mercatormap (20apr20)

git-svn-id: svn://tug.org/texlive/trunk@54812 c570f23f-e606-0410-a88d-b1316a301751
author: Karl Berry <karl@freefriends.org> 2020-04-20 21:10:20 +0000
committer: Karl Berry <karl@freefriends.org> 2020-04-20 21:10:20 +0000
commit: 36db81e567665da0b8e92831b69d2a71971312f3 (patch)
tree: c543aa6948c99b1ecb316c4386ee34dfeed4d384
parent: c01e3cc67bce910fad535c50c41da044fc23e882 (diff)
24 files changed, 7413 insertions, 1 deletions
diff --git a/Master/texmf-dist/doc/latex/mercatormap/README b/Master/texmf-dist/doc/latex/mercatormap/README
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+%% The LaTeX package mercatormap - version 1.00 (2020/04/20)
+%%
+%% -------------------------------------------------------------------------------------------
+%% Copyright (c) 2020 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% -------------------------------------------------------------------------------------------
+%%
+%% This work may be distributed and/or modified under the
+%% conditions of the LaTeX Project Public License, either version 1.3
+%% of this license or (at your option) any later version.
+%% The latest version of this license is in
+%%   http://www.latex-project.org/lppl.txt
+%% and version 1.3 or later is part of all distributions of LaTeX
+%% version 2005/12/01 or later.
+%%
+%% This work has the LPPL maintenance status `author-maintained'.
+%%
+%% This work consists of all files listed in README
+%%
+
+The package ...
+
+Contents of the package
+=======================
+  'README'                   this file
+  'mercatormap.sty'          LaTeX package file (style file)
+  'mercatorsupplier.def'     LaTeX package file (include file for style)
+  'mercatorpy.def'           LaTeX package file (Python generator)
+  'mercatormap.pdf'          Documentation
+  'mercatormap.tex'          Source code of the documentation (main file)
+  '*.doc.*'                  Source code of the documentation (include files)
+  'mercatormap-example.tex'  Source code of an example
+  'mercatormap.bib'          Bibliography of the documentation
+
+Installation
+============
+Copy the contents of the 'mercatormap.tds.zip' from CTAN to your local TeX file tree.
+
+Alternatively, put the files to their respective locations within the TeX installation:
+  'mercatormap.sty'       ->  /tex/latex/mercatormap
+  'mercatorpy.def'        ->  /tex/latex/mercatormap
+  'mercatorsupplier.def'  ->  /tex/latex/mercatormap
+
+  all other files         ->  /doc/latex/mercatormap
diff --git a/Master/texmf-dist/doc/latex/mercatormap/mercatormap-example.tex b/Master/texmf-dist/doc/latex/mercatormap/mercatormap-example.tex
new file mode 100644
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--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mercatormap/mercatormap-example.tex
@@ -0,0 +1,91 @@
+% \LaTeX-Main\
+% !TeX encoding=UTF-8
+%%
+%% The LaTeX package mercatormap - version 1.00 (2020/04/20)
+%% mercatormap-example.tex: Example document with a map
+%%
+%% -------------------------------------------------------------------------------------------
+%% Copyright (c) 2020 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% -------------------------------------------------------------------------------------------
+%%
+%% This work may be distributed and/or modified under the
+%% conditions of the LaTeX Project Public License, either version 1.3
+%% of this license or (at your option) any later version.
+%% The latest version of this license is in
+%%   http://www.latex-project.org/lppl.txt
+%% and version 1.3 or later is part of all distributions of LaTeX
+%% version 2005/12/01 or later.
+%%
+%% This work has the LPPL maintenance status `author-maintained'.
+%%
+%% This work consists of all files listed in README
+%%
+% arara: pdflatex: { shell: yes }
+%
+\def\mrcpkgprefix{}
+\documentclass{article}
+
+\usepackage[T1]{fontenc}
+\usepackage{lmodern}
+\usepackage[bookmarks,raiselinks,pageanchor,colorlinks]{hyperref}
+\usepackage[a4paper,margin=15mm,noheadfoot]{geometry}
+\usepackage{mercatormap}
+
+\pagestyle{empty}
+
+\mrcactivatescript% activates Python script
+
+\begin{document}
+
+\vspace*{\fill}
+\noindent
+\begin{tikzpicture}
+  \mrcNPdef{bbox-SW}{47.270111}{8.976350}
+  \mrcNPdef{bbox-NE}{50.564714}{13.839637}
+  \mrcmap
+  [
+    area = {bbox-SW, bbox-NE},
+    area to reference,
+    type   = reference,
+    flex reference scale = 2000000,
+    tex width  = \linewidth,
+    tex height = 22cm,
+    source     = topplusopen web,
+  ]{mercatormap-example}
+  \mrcdrawmap
+  \mrcdrawnetwork
+  \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+    {\mrcmapattribution};
+  \mrcclipmap
+
+  \draw[thick] (mrcmap.south west) rectangle (mrcmap.north east);
+
+  \mermapsetmarker{type=drop, draw=red, fill=red!20!white,
+    font=\sffamily\bfseries}
+  \mrcmarker{position=48.137222:11.575556, contents={M}}
+  \mrcmarker{position=48.537222:12.152222, contents={LA}}
+  \mrcmarker{position=49.017222:12.096944, contents={R}}
+  \mrcmarker{position=48.371667:10.898333, contents={A}}
+  \mrcmarker{position=49.300833:10.571667, contents={AN}}
+  \mrcmarker{position=49.948056:11.578333, contents={BT}}
+  \mrcmarker{position=49.948056:11.578333, contents={BT}}
+  \mrcmarker{position=49.794444:9.929444,  contents={W\"U}}
+
+  \node[below left=2mm,align=center,fill=white,draw=black,fill opacity=0.9,
+    text opacity=1,inner sep=2mm] at (mrcmap.north east)
+  {
+    \textbf{\Large Bayern}\\[1mm]
+    \mrcprettymapscale\\[1mm]
+    \begin{tikzpicture}
+    \mrcdrawscalebar[width-in-km=100]
+    \path[every node/.style={above,inner sep=0.5mm,font=\sffamily\tiny}]
+      (mrcscalebar.north west) -- (mrcscalebar.north east)
+      node[pos=0]{0} node[pos=0.2]{20} node[pos=0.4]{40} node[pos=0.6]{60}
+      node[pos=0.8]{80} node[pos=1]{100} node[pos=1,right,yshift=-1mm]{km};
+    \end{tikzpicture}
+  };
+
+\end{tikzpicture}
+\vspace*{\fill}
+
+\end{document}
diff --git a/Master/texmf-dist/doc/latex/mercatormap/mercatormap.bib b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.bib
new file mode 100644
index 00000000000..ef2e9b62131
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.bib
@@ -0,0 +1,48 @@
+% Encoding: UTF-8
+% include file of mercatormap.tex (manual of the LaTeX package mercatormap)
+
+@Report{Sturm:2020,
+  author      = {Thomas F. Sturm},
+  title       = {Some Principles of Web Mercator Maps and their Computation},
+  type        = {Monograph},
+  institution = {Universit\"{a}t der Bundeswehr M\"{u}nchen},
+  date        = {2020-03-05},
+  language    = {english},
+  location    = {Neubiberg},
+  pagetotal   = {44},
+  doi         = {10.18726/2020_3},
+}
+
+
+@manual{package:tikz,
+   author    = {Till Tantau},
+   title     = {The TikZ and PGF Packages},
+   subtitle  = {Manual for version 3.1.5b},
+   url       = {http://mirrors.ctan.org/graphics/pgf/base/doc/pgfmanual.pdf},
+   date      = {2020-01-08},
+}
+
+
+@manual{package:xparse,
+   author    = {{The \LaTeX3 Project}},
+   title     = {The xparse package},
+   subtitle  = {Document command parser},
+   url       = {http://mirrors.ctan.org/macros/latex/contrib/l3packages/xparse.pdf},
+   date      = {2020-03-06},
+}
+
+
+@manual{package:siunitx,
+   author    = {Joseph Wright},
+   title     = {siunitx -- A comprehensive (SI) units package},
+   url       = {http://mirrors.ctan.org/macros/latex/contrib/siunitx/siunitx.pdf},
+   date      = {2020-02-25},
+}
+
+
+@manual{package:expl3,
+   author    = {{The \LaTeX3 Project}},
+   title     = {The expl3 package and \LaTeX3 programming},
+   url       = {http://mirrors.ctan.org/macros/latex/contrib/l3kernel/expl3.pdf},
+   date      = {2020-04-06},
+}
diff --git a/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.abstract.tex b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.abstract.tex
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--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.abstract.tex
@@ -0,0 +1,106 @@
+% !TeX root = mercatormap.tex
+% !TeX encoding=UTF-8
+% !TeX spellcheck=en_US
+% include file of mercatormap.tex (manual of the LaTeX package mercatormap)
+
+\thispagestyle{empty}
+\begin{tcboutputlisting}
+\begin{tcolorbox}[spread,blankest]
+\mermapset{flex tile size=40mm}
+\begin{tikzpicture}
+\mrcmap[type=areafit,west=5,east=15,south=46,north=54,
+  source = opentopomap,
+  flex area scale=4 000 000,
+  tex width=\tcbtextwidth,
+  tex height=\tcbtextheight,
+  ]{title}
+\mrcclipmap
+\ExplSyntaxOn
+\sys_gset_rand_seed:n {15}
+\int_set:Nn \l_tmpa_int {1}
+\int_until_do:nNnn \l_tmpa_int > {77}
+  {
+    \fp_set:Nn \l_tmpa_fp {\tcbtextwidth/2
+      + \l_tmpa_int*2.5mm*cosd(18*\l_tmpa_int)}
+    \fp_set:Nn \l_tmpb_fp {\tcbtextheight/2
+      + \l_tmpa_int*2.5mm*sind(18*\l_tmpa_int)}
+    \node[inner~sep=0pt,draw=blue!50!gray,line~width=1mm,
+      at={(\fp_to_dim:N\l_tmpa_fp,\fp_to_dim:N\l_tmpb_fp)},
+      rotate=\fp_eval:n{18*\l_tmpa_int+10*rand()} ]
+        {\includegraphics[width=55mm,height=55mm]
+          {tiles/opentopomap_
+            \int_use:N \l__mermap_tile_zoom_int _
+            \fp_eval:n { randint(\l__mermap_tile_xmin_int,\l__mermap_tile_xmax_int) }_
+            \fp_eval:n { randint(\l__mermap_tile_ymin_int,\l__mermap_tile_ymax_int) }.png
+          }
+        };
+    \int_incr:N\l_tmpa_int
+  }
+\ExplSyntaxOff
+\node[font=\small\footnotesize,fill=white,opacity=0.75,text opacity=1]
+  at (\tcbtextwidth/2,1cm) {\mrcmapattribution};
+\node at (\tcbtextwidth/2,\tcbtextheight*0.667)
+  {\begin{tcolorbox}[
+    center upper, fontupper=\bfseries,boxsep=15mm, boxrule=4mm,
+    sharp corners, oversize=5mm,
+    colback=white, colframe=blue!50!gray,
+    enhanced jigsaw, opacityback=0.8, opacityframe=0.9 ]
+      {\Huge The mercatormap package\par}
+      \vspace{1cm}
+      Manual for version \version\ (\datum)\par
+      \vspace{5mm}
+      Thomas F.~Sturm
+  \end{tcolorbox}};
+\end{tikzpicture}
+\end{tcolorbox}
+\end{tcboutputlisting}
+\tcbuselistingtext
+\tcbinputlisting{docexample,
+  listing options={style=mydocumentation,basicstyle=\ttfamily\scriptsize},
+  listing only,
+  title=Cover code}
+
+
+\clearpage
+\begin{center}
+\begin{tcolorbox}[enhanced,hbox,tikznode,left=8mm,right=8mm,boxrule=0.4pt,
+  colback=white,colframe=Blue_Gray,
+  drop lifted shadow=Blue_Gray!50,arc is angular,
+  before=\par\vspace*{5mm},after=\par\bigskip]
+{\bfseries\LARGE The mercatormap package}\\[3mm]
+{\large Manual for version \version\ (\datum)}
+\end{tcolorbox}
+{\large Thomas F.~Sturm%
+  \footnote{Prof.~Dr.~Dr.~Thomas F.~Sturm, Institut f\"{u}r Mathematik und Informatik,
+    Universit\"{a}t der Bundeswehr M\"{u}nchen, D-85577 Neubiberg, Germany;
+     email: \href{mailto:thomas.sturm@unibw.de}{thomas.sturm@unibw.de}}\par\medskip
+\normalsize\url{http://www.ctan.org/pkg/mercatormap}\par
+\url{https://github.com/T-F-S/mercatormap}
+}
+\end{center}
+\bigskip
+\begin{absquote}
+  \begin{center}\bfseries Abstract\end{center}
+  The \texttt{mercatormap} package extends \tikzname\ with tools to
+  create map graphics. The provided coordinate system relies on the
+  Web Mercator projection used on the Web by OpenStreetMap and others.
+  The package supports the seamless integration of graphics
+  from public map tile servers by a Python script. Also, common map
+  elements like markers, geodetic networks, bar scales, routes, orthodrome
+  pieces, and more are part of the package.
+\end{absquote}
+
+\begin{tcolorbox}[breakable,enhanced jigsaw,before=\par\bigskip\noindent,
+  title={Contents},fonttitle=\bfseries\Large,center title,
+  colback=Blue_Gray!2!white,
+  colframe=Blue_Gray,
+  colbacktitle=Blue_Gray!5!white,
+  coltitle=black,
+  boxrule=0.4pt,arc is angular,
+  enlargepage flexible=\baselineskip,pad at break*=3mm,
+  %drop fuzzy shadow
+  ]
+\makeatletter
+\@starttoc{toc}
+\makeatother
+\end{tcolorbox}
diff --git a/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.definition.tex b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.definition.tex
new file mode 100644
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--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.definition.tex
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+% !TeX root = mercatormap.tex
+% !TeX encoding=UTF-8
+% !TeX spellcheck=en_US
+% include file of mercatormap.tex (manual of the LaTeX package mercatormap)
+\clearpage
+\section{Map Definition and Map Coordinates}\label{sec:map_definition}%
+
+\tikzsetnextfilename{def_mrcdefinemap}%
+\begin{dispExample}
+\begin{tikzpicture}
+\mrcdefinemap{west=11,east=13,north=49,south=48}
+\mrcdrawmap[draw=path]
+\mrcdrawnetwork
+\draw       (mrc cs:latitude=48.53475,longitude=12.15087)   circle (2mm);
+\draw[red]  (mrc cs:lat=48.53475,lon=12.15087)              circle (3mm);
+\draw[blue] (mrcq cs:48.53475:12.15087)                     circle (4mm);
+\ifmrcinmap{48.53475}{12.15087}{     \draw[yellow] (mrcpos) circle (5mm);}{}
+\ifmrcinvicinity{48.53475}{12.15087}{\draw[cyan]   (mrcpos) circle (6mm);}{}
+\end{tikzpicture}
+\end{dispExample}
+
+%-------------------------------------------------------------------------------
+\subsection{Option Setting}
+\begin{docCommand}{mermapset}{\marg{options}}
+  Sets \meta{options} for all following maps inside the current \TeX\ group.
+  All options share the common prefix |/mermap/|, e.g. for setting
+  \refKey{/mermap/vicinity} use
+  \begin{dispListing}
+    \mermapset{vicinity=3cm}
+  \end{dispListing}
+  Also see  \refCom{mrcdefinemap}, \refCom{mermapsetsupply},
+  and \refCom{mermapsetmarker}.\par
+  Note that the options by \refCom{mermapset} are |expl3| \cite{package:expl3}
+  keys while \tikzname\ \cite{package:tikz} uses its own key management.
+\end{docCommand}
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Manual Map Definition}
+The following map definition is only relevant, if no script setup is used
+and maps are generated completely manually.
+See \Fullref{sec:automated_map} for script aided map definitions.
+
+\begin{docCommand}{mrcdefinemap}{\marg{options}}
+  Establishes a map inside a |tikzpicture| environment following
+  and applying the given \meta{options}.
+  All options share the common prefix |/mermap/mapdef/|.
+  After \refCom{mrcdefinemap} is applied, map drawing and map coordinates
+  can be used.
+  \begin{itemize}
+  \item\refCom{mrcdefinemap} can be used directly, if no tile download
+    and no script setup is intended.
+  \item\refCom{mrcdefinemap} is implicitly used with
+    \refCom{mrcapplymap} and \refCom{mrcmap}. In this case, all options are
+    also set implicitly.
+  \end{itemize}
+\end{docCommand}
+
+
+\begin{docMrcKey}{mapdef/north}{=\meta{map north latitude}}{no default, initially 50}
+  Northern latitude degree of the visible map, possibly negative for the southern hemisphere,
+  lower than $90$ but always larger than \refKey{/mermap/mapdef/south}.
+  It is accessible as \docAuxCommand{mrcmapnorth} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{mapdef/south}{=\meta{map south latitude}}{no default, initially 48}
+  Southern latitude degree of the visible map, possibly negative for the southern hemisphere,
+  larger than $-90$ but always lower than \refKey{/mermap/mapdef/north}.
+  It is accessible as \docAuxCommand{mrcmapsouth} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{mapdef/west}{=\meta{map west longitude}}{no default, initially 11}
+  Western longitude degree of the visible map, possibly negative for the western hemisphere,
+  possibly shifted periodically, but always lower than \refKey{/mermap/mapdef/east}.
+  It is accessible as \docAuxCommand{mrcmapwest} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{mapdef/east}{=\meta{map east longitude}}{no default, initially 13}
+  Eastern longitude degree of the visible map, possibly negative for the western hemisphere,
+  possibly shifted periodically, but always larger than \refKey{/mermap/mapdef/west}.
+  It is accessible as \docAuxCommand{mrcmapeast} (use read-only).
+\end{docMrcKey}
+
+
+%-------------------------------------------------------------------------------
+\subsection{Further Map Definition Options}
+
+
+The following options are typically implicitly set by \refCom{mrcapplymap}
+and not manually by \refCom{mrcdefinemap}. However, some values are
+computationally used in all cases. They can be ignored as pure technical
+information.
+
+\begin{docMrcKey}{mapdef/xmin}{=\meta{map tile x minimum}}{no default, initially 271}
+  Minimal $x$ coordinate of the map tiles.
+\end{docMrcKey}
+
+\begin{docMrcKey}{mapdef/xmax}{=\meta{map tile x maximum}}{no default, initially 275}
+  Maximal $x$ coordinate of the map tiles.
+\end{docMrcKey}
+
+\begin{docMrcKey}{mapdef/ymin}{=\meta{map tile y minimum}}{no default, initially 173}
+  Minimal $y$ coordinate of the map tiles.
+\end{docMrcKey}
+
+\begin{docMrcKey}{mapdef/ymax}{=\meta{map tile y maximum}}{no default, initially 177}
+  Maximal $y$ coordinate of the map tiles.
+\end{docMrcKey}
+
+\begin{docMrcKey}{mapdef/zoom}{=\meta{map zoom}}{no default, initially 9}
+  Map tile zoom factor alias $z$ coordinate of the map tiles.
+\end{docMrcKey}
+
+\begin{docMrcKey}{mapdef/pixelwidth}{=\meta{map width in pixels}}{no default, initially 100}
+  Width of the visible map expressed in pixels of the source file(s).
+  It is accessible as \docAuxCommand{mrcpixelwidth} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{mapdef/pixelheight}{=\meta{map height in tiles}}{no default, initially 100}
+  Height of the visible map expressed in pixels of the source file(s).
+  It is accessible as \docAuxCommand{mrcpixelheight} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{mapdef/westoffset}{=\meta{map tile offset (west)}}{no default, initially 0}
+  Distance of the visible map from the western edge of the most western tile
+  expressed in tiles (range from 0 to 1).
+\end{docMrcKey}
+
+\begin{docMrcKey}{mapdef/northoffset}{=\meta{map tile offset (north)}}{no default, initially 0}
+  Distance of the visible map from the northern edge of the most northern tile
+  expressed in tiles (range from 0 to 1).
+\end{docMrcKey}
+
+\begin{docMrcKey}{mapdef/southoffset}{=\meta{map tile offset (south)}}{no default, initially 0}
+  Distance of the visible map from the southern edge of the most southern tile
+  expressed in tiles (range from 0 to 1).
+\end{docMrcKey}
+
+\begin{docMrcKey}{mapdef/basename}{=\meta{map tile base name}}{no default, initially \texttt{tiles/tile}}
+  File base name for the tiles.
+\end{docMrcKey}
+
+\begin{docMrcKey}{mapdef/attribution}{=\meta{attribution text}}{no default, initially empty}
+  Attribution text for the map source. Typically, it acknowledges the copyright
+  of the map data provider. It may contain hyperlinks.
+  It is accessible as \docAuxCommand{mrcmapattribution} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{mapdef/attribution print}{=\meta{attribution text}}{no default, initially empty}
+  Attribution text for the map source.
+  In contrast to \refKey{/mermap/mapdef/attribution} it is intended for media
+  that does not support hyperlinks like printed posters, books, etc.
+  It is accessible as \docAuxCommand{mrcmapattributionprint} (use read-only).
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{mapdef/resource}{=\meta{map resource}}{no default, initially |none|}
+  Available map resource with following feasible values:
+  \begin{itemize}
+  \item\docValue{none}: No tiles and no merged map.
+  \item\docValue{tiles}: Map tiles locally available.
+  \item\docValue{mergedmap}: Single map picture file merged from tiles locally available.
+  \item\docValue{wmsmap}: Single map picture file locally available.
+  \end{itemize}
+\end{docMrcKey}
+
+\begin{docMrcKey}{mapdef/tile size}{=\meta{length}}{no default, initially |32.512mm|}
+  Typically set computationally. It is identical to \refKey{/mermap/tile size}
+  which is the recommended user option for manual setup.
+\end{docMrcKey}
+
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Map Coordinate System}
+After a map is defined inside a |tikzpicture| environment
+by \refCom{mrcdefinemap}, \refCom{mrcapplymap}, or \refCom{mrcmap},
+a Mercator map coordinate system can be used.
+The border of the visible map is denoted by a \tikzname\ node \docNode{mrcmap}.
+
+\tikzsetnextfilename{def_coordinate_system}%
+\begin{dispExample}
+\begin{tikzpicture}
+  \mrcNPdef{nuremberg}{49.45522}{11.07631}
+  \mermapset{tile size=2cm}
+  \mrcdefinemap{west=5,east=15,south=47,north=55,zoom=7}
+  \path[draw,fill=green!10] (mrcmap.south west) rectangle (mrcmap.north east);
+  \mrcdrawnetwork
+  \fill (mrc cs:latitude=48.137222,longitude=11.575556) circle (2pt)
+    node[below] {M\"unchen};
+  \fill (mrc cs:lat=53.550556,lon=9.993333) circle (2pt)
+    node[above] {Hamburg};
+  \fill (mrcq cs:52.518611:13.408333) circle (2pt)
+    node[left] {Berlin};
+  \fill (\mrcNPcs{nuremberg}) circle (2pt) node[above] {N\"urnberg};
+  \ifmrcinmap{50.938056}{6.956944}{
+    \fill (mrcpos) circle (2pt) node[right] {K\"oln};}{}
+  \ifmrcNPinmap{nuremberg}{\draw[red] (mrcpos) circle (1cm);}{}
+\end{tikzpicture}
+\end{dispExample}
+
+
+\medskip
+The |mrc cs| coordinate system defines a map point by
+\refKey{/mermap/cs/latitude} and \refKey{/mermap/cs/longitude}
+
+\begin{docMrcKey}{cs/latitude}{=\meta{latitude}}{no default}
+  Sets the \meta{latitude} of a map point.
+\end{docMrcKey}
+
+\begin{docMrcKey}{cs/longitude}{=\meta{longitude}}{no default}
+  Sets the \meta{longitude} of a map point.
+\end{docMrcKey}
+
+\begin{dispListing}
+  \fill (mrc cs:latitude=48.137222,longitude=11.575556) circle (2pt);
+\end{dispListing}
+
+\medskip
+A map point can also be defined by shorter variants
+\refKey{/mermap/cs/lat} and \refKey{/mermap/cs/lon}
+
+\begin{docMrcKey}{cs/lat}{=\meta{latitude}}{no default}
+  Sets the \meta{latitude} of a map point.
+\end{docMrcKey}
+
+\begin{docMrcKey}{cs/lon}{=\meta{longitude}}{no default}
+  Sets the \meta{longitude} of a map point.
+\end{docMrcKey}
+
+\begin{dispListing}
+  \fill (mrc cs:lat=48.137222,lon=11.575556) circle (2pt);
+\end{dispListing}
+
+\medskip
+A map point can be defined even quicker by
+|(mrcq cs:|\meta{latitude}|:|\meta{longitude}|)|.
+
+\begin{dispListing}
+  \fill (mrcq cs:48.137222:11.575556) circle (2pt);
+\end{dispListing}
+
+\medskip
+
+\begin{docCommand}{mrcpgfpoint}{\marg{latitude}\marg{longitude}}
+  Yields a low level |pgf| point location given by
+  \meta{latitude} and \meta{longitude}.
+  This can be used like |\pgfpoint|.
+  \begin{dispListing}
+    \pgfpathcircle{\mrcpgfpoint{49.45522}{11.07631}}{2pt}
+    \pgfusepath{fill}
+  \end{dispListing}
+\end{docCommand}
+
+
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Named Positions}\label{sec:names_positions}
+
+
+\begin{docCommand}{mrcNPdef}{\marg{name}\marg{latitude}\marg{longitude}}
+  A coordinate pair of \meta{latitude} and \meta{longitude}
+  can be saved as \emph{named position} (NP) to a \meta{name} for later use.
+  The \emph{named position} just stores the given values as evaluated
+  floating points but without coordinate system processing.
+  Therefore, a named position can be used outside a map definition
+  or |tikzpicture| environment, even as a preset for the whole document.
+  Note that this saving is not global but only effective inside the
+  current \TeX\ group.
+  \begin{dispListing}
+    \mrcNPdef{nuremberg}{49.45522}{11.07631}
+  \end{dispListing}
+\end{docCommand}
+
+
+\begin{docCommand}{mrcNPfrompoint}{\marg{name}\marg{\tikzname\ point}}
+  \emph{Latitude} and \emph{longitude} of a given \meta{\tikzname\ point} are
+  calculated and saved as \emph{named position} (NP) with given \meta{name}.
+  \refCom{mrcNPfrompoint} can only be used after a valid a map definition
+  inside a |tikzpicture| environment.
+  \begin{dispListing}
+    \mrcNPfrompoint{mapcenter}{mrcmap.center}
+    \mrcNPfrompoint{mytest}{[xshift=1cm,yshift=1cm]mrcmap.south west}
+  \end{dispListing}
+\end{docCommand}
+
+
+\begin{docCommand}{mrcNPcs}{\marg{name}}
+  A map point definition from the \meta{name} of a previously saved
+  \emph{named position} (NP).
+  \begin{dispListing}
+    \fill (\mrcNPcs{nuremberg}) circle (2pt) node[above] {N\"urnberg};
+  \end{dispListing}
+\end{docCommand}
+
+
+\begin{docCommand}{mrcNPlat}{\marg{name}}
+  Inserts the \emph{latitude} of a \emph{named position} with given \meta{name}.
+  \refCom{mrcNPlat} is expandable and may be used in floating point expressions.
+  \begin{dispExample}
+    \mrcNPdef{nuremberg}{49.45522}{11.07631}
+    Latitude: \mrcNPlat{nuremberg}\\
+    Longitude: \mrcNPlon{nuremberg}
+  \end{dispExample}
+\end{docCommand}
+
+
+\begin{docCommand}{mrcNPlon}{\marg{name}}
+  Inserts the \emph{longitude} of a \emph{named position} with given \meta{name}.
+  \refCom{mrcNPlon} is expandable and may be used in floating point expressions.
+\end{docCommand}
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Tests for Points to be inside or outside a Map}
+
+When a map is drawn, \refCom{mrcclipmap} can be used to set up a
+\tikzname\ clip environment which automatically removes all content which
+is not inside the defined map. However, the \tikzname\ position of a geographic
+point has to be computed first to decide, if this point is to be drawn.
+Since \TeX\ length registers do not allow large dimensions, compiler errors
+are possible to happen.
+
+The following tests check given geographic coordinates before they are
+transformed to \TeX\ dimensions and avoid such compiler errors.
+
+\begin{docCommand}{ifmrcinmap}{\marg{latitude}\marg{longitude}\marg{true}\marg{false}}
+  If the given \meta{latitude} and \meta{longitude} describes a point
+  inside the visible map, the \meta{true} code is executed, otherwise
+  the \meta{false} code.\par
+  Inside the \meta{true} code a \tikzname\ coordinate \docNode{mrcpos}
+  describes the given point. Also, \docNode{mrclastpos} denotes the
+  \emph{last} position before.
+  \begin{dispListing}
+    \ifmrcinmap{48.137222}{11.575556}{\fill (mrcpos) circle (2pt);}{}
+  \end{dispListing}
+\end{docCommand}
+
+\begin{docCommand}{ifmrcNPinmap}{\marg{name}\marg{true}\marg{false}}
+  If the given \emph{named position} (NP) \meta{name} describes a point
+  inside the visible map, the \meta{true} code is executed, otherwise
+  the \meta{false} code.
+  \begin{dispListing}
+    \mrcNPdef{munich}{48.137222}{11.575556}
+    \ifmrcNPinmap{munich}{\fill (mrcpos) circle (2pt);}{}
+  \end{dispListing}
+\end{docCommand}
+
+
+Very similar to \refCom{ifmrcinmap} is \refCom{ifmrcinvicinity}.
+
+\begin{docCommand}{ifmrcinvicinity}{\marg{latitude}\marg{longitude}\marg{true}\marg{false}}
+  If the given \meta{latitude} and \meta{longitude} describes a point
+  inside a vicinity of the visible map, i.e. the map \emph{plus} a margin of \refKey{/mermap/vicinity},
+  the \meta{true} code is executed, otherwise
+  the \meta{false} code.\par
+  Inside the \meta{true} code a \tikzname\ coordinate \docNode{mrcpos}
+  describes the given point. Also, \docNode{mrclastpos} denotes the
+  \emph{last} position before.\par
+  \refCom{ifmrcinvicinity} may be used for objects of a certain size like
+  markers which could be partly visible even when their reference point
+  is outside the visible map (but nearby).
+\begin{dispListing}
+  \ifmrcinvicinity{48.137222}{11.575556}{\fill (mrcpos) circle (2pt);}{}
+\end{dispListing}
+\end{docCommand}
+
+
+\begin{docCommand}{ifmrcNPinvicinity}{\marg{name}\marg{true}\marg{false}}
+  If the given \emph{named position} (NP) \meta{name} describes a point
+  inside a vicinity of the visible map, the \meta{true} code is executed, otherwise
+  the \meta{false} code, see \refCom{ifmrcinvicinity}.
+\begin{dispListing}
+  \mrcNPdef{munich}{48.137222}{11.575556}
+  \ifmrcNPinvicinity{munich}{\fill (mrcpos) circle (2pt);}{}
+\end{dispListing}
+\end{docCommand}
+
+
+\begin{docMrcKey}{vicinity}{=\meta{width}}{no default, initially |2cm|}
+  The vicinity of the map is the given map plus a border in all directions
+  with the given \meta{width}.
+\end{docMrcKey}
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Formatted Coordinate Output}
+
+\begin{docCommand}{mrcformlat}{\oarg{options}\marg{latitude}}
+  Formatted output for a given \meta{latitude} following given \meta{options}.
+  Formatting \meta{options} are described in the following.
+  \begin{dispExample}
+    Latitude from \mrcformlat{-24.29} to \mrcformlat{12.3456789}.
+  \end{dispExample}
+\end{docCommand}
+
+\begin{docCommand}{mrcformlon}{\oarg{options}\marg{longitude}}
+  Formatted output for a given \meta{longitude} following given \meta{options}.
+  Formatting \meta{options} are described in the following.
+  \begin{dispExample}
+    Longitude from \mrcformlon{-24.29} to \mrcformlon{12.3456789}.
+  \end{dispExample}
+\end{docCommand}
+
+
+\begin{docMrcKey}{format angle}{=\meta{type}}{no default, initially |decimal-4|}
+  The \meta{type} defines some formatting settings for
+  \refCom{mrcformlat} and \refCom{mrcformlon}. Internally, the |\ang| macro
+  from package |siunitx| \cite{package:siunitx} is used which can be controlled by further settings
+  of |siunitx| like digit grouping or changing the decimal marker.\par
+  Feasible values for \meta{type} are
+  \begin{itemize}
+  \item\docValue{decimal}: decimal output without rounding.
+    \begin{dispExample}
+      \mermapset{format angle=decimal}
+      Longitude from \mrcformlon{-24.29} to \mrcformlon{12.3456789}.
+    \end{dispExample}
+  \item\docValue{decimal-0}: decimal output with rounding to full degrees.
+    \begin{dispExample}
+      \mermapset{format angle=decimal-0}
+      Longitude from \mrcformlon{-24.29} to \mrcformlon{12.3456789}.
+    \end{dispExample}
+  \item\docValue{decimal-1}: decimal output with rounding to one place.
+    \begin{dispExample}
+      \mermapset{format angle=decimal-1}
+      Longitude from \mrcformlon{-24.29} to \mrcformlon{12.3456789}.
+    \end{dispExample}
+  \item\docValue{decimal-2}: decimal output with rounding to two places.
+    \begin{dispExample}
+      \mermapset{format angle=decimal-2}
+      Longitude from \mrcformlon{-24.29} to \mrcformlon{12.3456789}.
+    \end{dispExample}
+  \pagebreak
+  \item\docValue{decimal-3}: decimal output with rounding to three places.
+    \begin{dispExample}
+      \mermapset{format angle=decimal-3}
+      Longitude from \mrcformlon{-24.29} to \mrcformlon{12.3456789}.
+    \end{dispExample}
+  \item\docValue{decimal-4}: decimal output with rounding to four places.
+    \begin{dispExample}
+      \mermapset{format angle=decimal-4}
+      Longitude from \mrcformlon{-24.29} to \mrcformlon{12.3456789}.
+    \end{dispExample}
+  \item\docValue{degree}: output with rounding to full degrees.
+      This is an alias for \docValue{decimal-0}.
+    \begin{dispExample}
+      \mermapset{format angle=degree}
+      Longitude from \mrcformlon{-24.29} to \mrcformlon{12.3456789}.
+    \end{dispExample}
+  \item\docValue{minute}: output with rounding to degrees and full minutes.
+    \begin{dispExample}
+      \mermapset{format angle=minute}
+      Longitude from \mrcformlon{-24.29} to \mrcformlon{12.3456789}.
+    \end{dispExample}
+  \item\docValue{second}: output with rounding to degrees, minutes, and full seconds.
+    \begin{dispExample}
+      \mermapset{format angle=second}
+      Longitude from \mrcformlon{-24.29} to \mrcformlon{12.3456789}.
+    \end{dispExample}
+  \end{itemize}
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{format south}{=\meta{code}}{no default, initially \texttt{\#1\textbackslash,S}}
+  Defines the format \meta{code} for a negative latitude.
+  Use \texttt{\#1} to place the number (without sign).
+  \begin{dispExample}
+    \mermapset{format south={$-#1$}}
+    Latitude \mrcformlat{-24.29}.
+  \end{dispExample}
+\end{docMrcKey}
+
+\begin{docMrcKey}{format north}{=\meta{code}}{no default, initially \texttt{\#1\textbackslash,N}}
+  Defines the format \meta{code} for a non-negative latitude.
+  Use \texttt{\#1} to place the number.
+  \begin{dispExample}
+    \mermapset{format north={#1 North}}
+    Latitude \mrcformlat{12.3456789}.
+  \end{dispExample}
+\end{docMrcKey}
+
+\pagebreak
+\begin{docMrcKey}{format east}{=\meta{code}}{no default, initially \texttt{\#1\textbackslash,E}}
+  Defines the format \meta{code} for a positive longitude.
+  Use \texttt{\#1} to place the number (without sign).
+  \begin{dispExample}
+    \mermapset{format east={#1\,O}}
+    \sisetup{output-decimal-marker={,}}
+    L\"angengrad \mrcformlon{12.3456789}.
+  \end{dispExample}
+\end{docMrcKey}
+
+\begin{docMrcKey}{format west}{=\meta{code}}{no default, initially \texttt{\#1\textbackslash,W}}
+  Defines the format \meta{code} for a negative longitude.
+  Use \texttt{\#1} to place the number.
+  \begin{dispExample}
+    \mermapset{format west={West: #1}}
+    Longitude \mrcformlon{-24.29}.
+  \end{dispExample}
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{format NEWS numeric}{}{no value}
+  Defines the format for north, east, west, and south as numeric value
+  without N, E, W, S.
+  \begin{dispExample}
+    \mermapset{format NEWS numeric}
+    Longitude \mrcformlon{-24.29} and \mrcformlon{12.3456789}.\\
+    Latitude  \mrcformlat{-24.29} and \mrcformlat{12.3456789}.
+  \end{dispExample}
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{format NEWS absolute}{}{no value}
+  Defines the format for north, east, west, and south as absolute value
+  without N, E, W, S and without algebraic sign.
+  \begin{dispExample}
+    \mermapset{format NEWS absolute}
+    Longitude \mrcformlon{-24.29} and \mrcformlon{12.3456789}.\\
+    Latitude  \mrcformlat{-24.29} and \mrcformlat{12.3456789}.
+  \end{dispExample}
+\end{docMrcKey}
+
diff --git a/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.drawing.tex b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.drawing.tex
new file mode 100644
index 00000000000..a40131381f9
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.drawing.tex
@@ -0,0 +1,253 @@
+% !TeX root = mercatormap.tex
+% !TeX encoding=UTF-8
+% !TeX spellcheck=en_US
+% include file of mercatormap.tex (manual of the LaTeX package mercatormap)
+\clearpage
+\section{Map Drawing}
+
+%-------------------------------------------------------------------------------
+\subsection{Principal Drawing}
+
+\begin{docCommand}{mrcdrawmap}{\oarg{options}}
+  Inside a |tikzpicture| environment, \refCom{mrcdrawmap} draws a map
+  prepared by \refCom{mrcdefinemap}, \refCom{mrcapplymap}, or \refCom{mrcmap}.
+  All \meta{options} share the common prefix |/mermap/|.
+  This is the principal macro to draw a prepared map respectively
+  the background of the map. The background consists of downloaded map tiles
+  or just a color rectangle.
+\end{docCommand}
+
+\begin{docMrcKey}{draw}{=\meta{tile draw}}{no default, initially |auto|}
+  \begin{itemize}
+  \item\docValue{auto}: Draws the map according to \refKey{/mermap/mapdef/resource},
+    i.e. downloaded maps or tiles are used, if available.
+  \item\docValue{path}: Draws the map according to the style given by
+    \refKey{/mermap/map path}. Existing map tiles or merged maps are ignored
+  \item\docValue{tiles}: Draws the map with downloaded map tiles, if
+    available.
+  \item\docValue{mergedmap}: Draws the map with a merged picture, if
+    available.
+  \item\docValue{wmsmap}: Draws the map with a downloaded WMS picture, if
+    available.
+  \end{itemize}
+\end{docMrcKey}
+
+\begin{docMrcKey}{map path}{=\meta{options}}{no default, initially |upper left=green!50,|\\|upper right=green!25, lower left=green!50!black!50, lower right=green!25|}
+  Defines a \tikzname\ style for drawing the map without tiles.
+  \meta{options} are feasible \tikzname\ path options.
+\end{docMrcKey}
+
+\begin{docMrcKey}{map clip}{=\meta{code}}{no default, initially \refCom{mrcclipmap}}
+  Clipping options for the map. By default, the defined map is
+  clipped with the full map rectangle. Use this option only, if you not want to clip
+  the map to its specified size. \meta{code} is some \tikzname\ clipping code.
+\end{docMrcKey}
+
+\begin{docMrcKey}{map scope}{=\meta{options}}{no default, initially empty}
+  \refCom{mrcdrawmap} uses a |scope| environment inside which takes
+  the given \tikzname\ \meta{options}.
+\end{docMrcKey}
+
+
+\begin{docCommand}{mrcclipmap}{}
+  Clips all subsequent drawings against the applied map.\\
+  This is a shortcut macro identical to
+  \begin{dispListing}
+  \path[clip] (mrcmap.south west) rectangle (mrcmap.north east);
+  \end{dispListing}
+\end{docCommand}
+
+
+\begin{docCommand}{mrcboundmap}{}
+  Sets the picture bounding box according to the applied map.\\
+  This is a shortcut macro identical to
+  \begin{dispListing}
+  \path[use as bounding box]
+    (mrcmap.south west) rectangle (mrcmap.north east);
+  \end{dispListing}
+\end{docCommand}
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Flexible Tile Size}\label{sec:flexible_tile_size}
+
+Typically, the pixel size of a map tile is fixed and a map tile is a
+pixel graphics file. The actual size of such an included picture inside
+the document is freely selectable. Note that a very small
+\refKey{/mermap/tile size} results in very small map lettering,
+while a very large \refKey{/mermap/tile size} results results in
+very blurred images.
+
+The general idea of a \emph{flexible} tile size is to specify an aspired
+tile size called \refKey{/mermap/flex tile size} and to give \LaTeX\
+the freedom to select \refKey{/mermap/tile size} in \emph{about the same size}
+as \refKey{/mermap/flex tile size}.
+This freedom is used to achieve a \emph{pseudo zoom} called
+\refKey{/mermap/flex zoom} which is a nearly arbitrary rational number instead
+of \refKey{/mermap/supply/zoom} which is a natural number.
+
+This \emph{pseudo zoom} is applied by several options which share \emph{flex}
+in their names, e.g.
+\refKey{/mermap/flex scale}, \refKey{/mermap/named flex scale},
+\refKey{/mermap/supply/flex reference scale},
+\refKey{/mermap/supply/flex area scale},
+\refKey{/mermap/supply/flex area fit}.
+
+
+
+\begin{docMrcKey}{tile size}{=\meta{length}}{no default, initially |32.512mm|}
+  Width and height of a drawn tile picture are set to \meta{length}.
+  For standard tiles with 256 times 256 pixels a tile size of
+  \SI{32.512}{mm} = \SI{1.28}{in} results in an approximate
+  \SI{200}{dpi} output for the document.
+  For a |beamer| document, consider to use a \refKey{/mermap/tile size} of
+  \SI{21.333333}{mm} to get approximate 1:1 pixel input and output (depending on |beamer| settings
+  and used hardware). Also see \refKey{/mermap/mapdef/tile size}.
+\end{docMrcKey}
+
+\begin{docMrcKey}{flex tile size}{=\meta{length}}{no default, initially |32.512mm|}
+  Aspired width and height of a tile picture are set to \meta{length}.
+  This value is used while applying \refKey{/mermap/flex zoom}.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{flex zoom}{=\meta{pseudo zoom}}{style, no default}
+  This style sets \refKey{/mermap/supply/zoom} and \refKey{/mermap/tile size} in combination.
+  \begin{itemize}
+  \item
+    If \meta{pseudo zoom} is a natural number,
+    \refKey{/mermap/supply/zoom} is set to \meta{pseudo zoom} and
+    \refKey{/mermap/tile size} is set to \refKey{/mermap/flex tile size}.
+  \item Otherwise, \refKey{/mermap/supply/zoom} is set to the natural number
+    closest to \meta{pseudo zoom} and \refKey{/mermap/tile size} is such
+    enlarged or reduced that the \meta{pseudo zoom} value is simulated,
+    i.e. the \emph{impression} of a rational zoom factor is given.
+  \end{itemize}
+  Note that \refKey{/mermap/flex zoom} has to be used \emph{before}
+  \refCom{mrcsupplymap} or \refCom{mrcmap}, because the zoom setup is
+  adapted.
+\end{docMrcKey}
+
+
+\clearpage
+\begin{docMrcKey}{flex scale}{=\meta{scale denominator}:\meta{latitude}}{style, no default}
+  For different latitude scopes, an identical zoom factor produces maps of
+  different scale. With \refKey{/mermap/flex scale}, a \refKey{/mermap/flex zoom}
+  is computed to achieve the given \meta{scale denominator} at a given \meta{latitude}.
+  Note that this only applies to the center of a map. If the produced
+  map is not centered at \meta{latitude}, the produced scale may
+  differ from the intended one.
+  Also see \refKey{/mermap/supply/flex reference scale}.
+
+\tikzsetnextfilename{drawing_flex_scale}%
+\begin{dispExample}
+\begin{tikzpicture}
+  \mermapset{flex scale=250000:48.14}
+  \mrcmap[type=reference,latitude=48.14,longitude=11.57,
+    source=opentopomap,
+    tex width=\linewidth,tex height=5cm]{}
+  \mrcdrawmap
+  \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+        {\mrcmapattribution};
+  \mrcclipmap
+  \path[draw] (mrcmap.south west) rectangle (mrcmap.north east);
+  \node[below left=2mm, align=right, fill=white, fill opacity=0.5,
+      text opacity=1]
+    at (mrcmap.north east) {scale \mrcprettymapscale};
+\end{tikzpicture}
+\end{dispExample}
+\end{docMrcKey}
+
+
+
+\begin{docMrcKey}{named flex scale}{=\meta{scale denominator}:\meta{name}}{style, no default}
+  Identical to \refKey{/mermap/flex scale}, but used the \emph{named position}
+  \meta{name} to provide a \emph{latitude}, see \Fullref{sec:names_positions}.
+  \begin{dispListing}
+  \mrcNPdef{munich}{48.137222}{11.575556}
+  \mermapset{named flex scale=250000:munich} % identical to the following
+  \mermapset{flex scale=250000:\mrcNPlat{munich}}
+  \end{dispListing}
+\end{docMrcKey}
+
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Geodetic Network}
+
+\begin{docCommand}{mrcdrawnetwork}{\oarg{options}}
+  Draws a geodetic network with meridians and parallels.
+  All \meta{options} share the common prefix |/mermap/|.
+  The displayed lines are selected automatically according to some tuning
+  parameters.
+  The map is sliced in \emph{about} maximal \refKey{/mermap/network pieces} in each
+  direction. Meridians and parallels share a minimal distance of
+  \emph{about} \refKey{/mermap/network distance}. The algorithm is
+  allowed to violate these conditions \emph{somewhat}.
+
+  Note that oversized maps are not supported, i.e. maps which are wider
+  than \ang{360} in longitude. Here, meridians are expected to be missing
+  or misplaced.
+
+\tikzsetnextfilename{drawing_network}%
+\begin{dispExample*}{center lower}
+% \mrcsetapikey{openrouteservice}{YOUR-API-KEY}  % registered key
+\begin{tikzpicture}
+  \mrcmap[  type = boundaries,
+    west = -20, east = 40, south = 36, north = 65,
+    source=openrouteservice mapsurfer,
+    flex area scale=40 000 000 ]{}
+  \mrcdrawmap
+  \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+        {\mrcmapattribution};
+  \mrcclipmap
+  \mrcdrawnetwork
+  \path[draw] (mrcmap.south west) rectangle (mrcmap.north east);
+\end{tikzpicture}
+\end{dispExample*}
+\end{docCommand}
+
+
+\begin{docMrcKey}{network pieces}{=\meta{number}}{no default, initially |8|}
+  The map is sliced in \emph{about} maximal \meta{number} pieces in each
+  direction. \meta{number} may be exceeded \emph{somewhat}.
+  It is underrun to comply with \refKey{/mermap/network distance}.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{network distance}{=\meta{mesh width}}{no default, initially |2cm|}
+  Meridians and parallels share a minimal distance of
+  \emph{about} \meta{mesh width}.
+  \meta{mesh width} may be underrun \emph{somewhat}.
+  It is exceeded to comply with \refKey{/mermap/network pieces}.
+  For parallels on small scale maps, it refers to an averaged mesh width.
+\end{docMrcKey}
+
+\begin{docMrcKey}{network font}{=\meta{text}}{no default, initially
+  |\textbackslash fontsize\brackets{4pt}\brackets{4pt}\textbackslash sffamily|}
+  \meta{text} is some font setting for the latitude and longitude display.
+\end{docMrcKey}
+
+
+
+\subsection{Graphical Debug Overlay}
+
+\begin{docCommand}{mrcdrawinfo}{}
+  Draws some map information overlay for debugging purposes only.
+  \tikzsetnextfilename{drawing_mrcdrawinfo}%
+  \begin{dispExample}
+  \begin{tikzpicture}
+    \mrcNPdef{munich}{48.137222}{11.575556}
+    \mrcmap[type=reference, named position=munich, source=opentopomap,
+      flex reference scale=50000,
+      tex width=\linewidth,tex height=10cm]{}
+    \mrcdrawmap
+    \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+          {\mrcmapattribution};
+    \mrcclipmap
+    \mrcdrawinfo
+  \end{tikzpicture}
+  \end{dispExample}
+\end{docCommand}
diff --git a/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.examples.tex b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.examples.tex
new file mode 100644
index 00000000000..f2630fef152
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.examples.tex
@@ -0,0 +1,373 @@
+% !TeX root = mercatormap.tex
+% !TeX encoding=UTF-8
+% !TeX spellcheck=en_US
+% include file of mercatormap.tex (manual of the LaTeX package mercatormap)
+\clearpage
+\section{Examples}\label{sec:examples}%
+
+The following map examples may be used as tutorials and
+starting point for own applications.
+Also see |mercatormap-example.tex| for a compilable full example.
+Note to do all preparations documented in \Fullref{sec:python}.
+
+
+%-------------------------------------------------------------------------------
+\subsection{Reference Position}
+
+With \refKey{/mermap/supply/type}|=|\docValue{reference} a map with a
+\emph{reference position} is constructed. Here, Munich is taken as
+reference position and center of the map. Since the position is used
+more than once, it is stored with \refCom{mrcNPdef} for further reference.
+With \refKey{/mermap/supply/flex reference scale} the scale
+is set to 1:6\,000\,000. For the background map tiles, a
+\refKey{/mermap/supply/source} is selected for download.
+This setup is done by \refCom{mrcmap} while \refCom{mrcdrawmap} draws
+the downloaded map tiles.
+
+\tikzsetnextfilename{examples_reference}%
+\begin{dispExample*}{center lower, breakable}
+\begin{tikzpicture}
+  \sffamily
+  \mrcNPdef{munich}{48.137222}{11.575556}
+  \mrcNPdef{vienna}{48.208333}{16.373056}
+  \mrcNPdef{cologne}{50.938056}{6.956944}
+  \mrcNPdef{milano}{45.4625}{9.186389}
+  \mrcmap[type=reference,
+    named position=munich,
+    flex reference scale=6 000 000,
+    source=topplusopen web,
+    tex width=14cm,
+    tex height=14cm]{examples_reference}
+  \path[draw=yellow!50!gray,fill=yellow!20]
+    ([xshift=-2mm,yshift=-5mm]mrcmap.south west) rectangle
+    ([xshift=2mm,yshift=15mm]mrcmap.north east);
+  \mrcdrawmap
+  \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+    {\mrcmapattribution};
+  \path[draw=yellow!50!gray] (mrcmap.south west) rectangle (mrcmap.north east);
+
+  \mrcNPdraworthodrome[red,very thick]{munich}{milano}
+  \path[blue,very thick] (\mrcNPcs{munich}) --
+    node[red,fill=white,sloped,below] {\mrcNPprettyloxodistance{munich}{milano}}
+    (\mrcNPcs{milano});
+
+  \mermapsetmarker{type=pin, draw=red, fill=red!10, font=\sffamily\small}
+  \mrcmarker{named position=munich,  contents={M\"unchen}}
+  \mrcmarker{named position=vienna,  contents={Wien}}
+  \mrcmarker{named position=cologne, contents={K\"oln}}
+  \mrcmarker{named position=milano,  contents={Milano}}
+
+  \node[above left=5mm,font=\Large\bfseries] at (mrcmap.north east) {Munich};
+
+  \node[above right] at ([yshift=10mm]mrcmap.north west)
+    {Scale \mrcprettymapscale};
+
+  \mrcdrawscalebar[width-in-km=300,partitions=6,north-west-outside=0mm;5mm,
+    single, height=1mm, major style={yellow!50!gray!50!black}]
+  \path[every node/.style={above,inner sep=0.5mm,font=\sffamily\tiny}]
+    (mrcscalebar.north west) -- (mrcscalebar.north east)
+    node[pos=0]{0} node[pos=0.3333]{100} node[pos=0.6667]{200}
+    node[pos=1]{300\,km};
+
+  \mrcdrawscalebar[width-in-mile=200,partitions=8,
+    at={(mrcscalebar.south west)},placement=below right,
+    single, height=1mm, major style={yellow!50!gray!50!black}]
+  \path[every node/.style={below,inner sep=0.5mm,font=\sffamily\tiny}]
+    (mrcscalebar.south west) -- (mrcscalebar.south east)
+    node[pos=0]{0} node[pos=0.25]{50} node[pos=0.5]{100} node[pos=0.75]{150}
+    node[pos=1]{200\,miles};
+\end{tikzpicture}
+\end{dispExample*}
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Fitting Area}
+
+With \refKey{/mermap/supply/type}|=|\docValue{areafit} a map is constructed
+where a given area is fitted in. The following example lists some
+US-American cities and constructs an \refKey{/mermap/supply/area} which
+contains all of them. With \refKey{/mermap/supply/flex area fit}|=15mm| a
+border region is added.
+
+
+\tikzsetnextfilename{examples_fitting_area}%
+\begin{dispExample*}{center lower}
+\begin{tikzpicture}
+  \mrcNPdef{honolulu}{21.305225}{-157.867}
+  \mrcNPdef{fairbanks}{64.8379435}{-147.7192214}
+  \mrcNPdef{sandiego}{32.7146781}{-117.1640995}
+  \mrcNPdef{miami}{25.7599333}{-80.1951257}
+  \mrcNPdef{boston}{42.359744}{-71.061322}
+  \mrcNPdef{denver}{39.7372435}{-104.997378}
+  \mrcmap[type=areafit,
+    area={honolulu,fairbanks,sandiego,miami,boston,denver},
+    source=stamen terrain,
+    tex width=15cm, tex height=11cm,
+    flex area fit=15mm,
+    ]{examples_fitting_area}
+  \mrcdrawmap \mrcdrawnetwork
+  \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+    {\mrcmapattribution};
+  \node[below left,fill=white,opacity=0.8,text opacity=1] at (mrcmap.north east)
+    {Scale \mrcprettymapscale};
+  \path[draw] (mrcmap.south west) rectangle (mrcmap.north east);
+  \foreach \city in {honolulu,fairbanks,sandiego,miami,boston,denver}
+    {\mrcmarker{type=ringx, draw=red, fill=red!20, named position=\city}}
+\end{tikzpicture}
+\end{dispExample*}
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Fixed Boundaries}
+
+With \refKey{/mermap/supply/type}|=|\docValue{boundaries} a map is constructed
+with fixed boundaries. In contrast to the other map types, the document
+map size cannot be given directly but derives from the map setup. This bears
+the risk of too large maps. The following example is a map with exact
+boundaries \mrcformlat{-45} to \mrcformlat{-10}
+and \mrcformlon{110} to \mrcformlon{155}. A decent \refKey{/mermap/supply/zoom}
+is 5 (every zoom step doubles the map size in each direction).
+
+\tikzsetnextfilename{examples_boundaries}%
+\begin{dispExample*}{center lower,breakable}
+% \mrcsetapikey{openrouteservice}{YOUR-API-KEY}  % registered key
+\begin{tikzpicture}
+  \mrcmap[type=boundaries,
+    west=110,east=155,south=-45,north=-10,
+    zoom=5,
+    source=openrouteservice mapsurfer,
+    ]{examples_boundaries}
+  \mrcdrawmap
+  \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+    {\mrcmapattribution};
+  \mrcdrawnetwork
+  \mrcdrawscalebar[width-in-km=1000,partitions=4,south-west-inside=5mm,
+    major style={blue!50!gray!50!black}]
+  \path[every node/.style={below,inner sep=0.5mm,font=\sffamily\tiny}]
+    (mrcscalebar.south west) -- (mrcscalebar.south east)
+    node[pos=0]{0} node[pos=0.5]{500}
+    node[pos=1]{1000} node[pos=1,right,yshift=1mm]{km};
+  \mrcmarker{lat=-35.3,lon=149.116667,type=pictodropring,
+    draw=red,fill=red!10}
+\end{tikzpicture}
+\end{dispExample*}
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Map Without Map Tiles}
+
+There is no coercion to use downloaded map tiles, if they are not needed or
+wanted. With \refKey{/mermap/supply/target}|=none| no map tiles are downloaded.
+The following example draws a rough polygon shape of Germany using
+\refEnv{mrcroute*}.
+
+\tikzsetnextfilename{examples_routemap}%
+\begin{dispExample*}{center lower,breakable}
+\begin{tikzpicture}
+  \mrcNPdef{munich}{48.137222}{11.575556}
+  \mrcNPdef{cologne}{50.938056}{6.956944}
+  \mrcNPdef{hamburg}{53.550556}{9.993333}
+  \mrcNPdef{berlin}{52.518611}{13.408333}
+  \mrcmap[type=areafit,
+    west=5,east=15,south=47,north=55,
+    target=none,
+    tex width=14cm, tex height=14cm,
+    flex area fit=5mm
+    ]{examples_routemap}
+  \mrcclipmap
+  \path[draw,fill=yellow!5] (mrcmap.south west) rectangle (mrcmap.north east);
+  \begin{mrcroute*}[
+      preaction={fill=black,opacity=.5,
+          transform canvas={xshift=1mm,yshift=-1mm}},
+      draw         = green!50!black,
+      top color    = green!50!gray!5,
+      bottom color = green!50!gray!15]
+    \mrcpoint{47.57268069220318}{8.07968771809688}
+    \mrcpoint{47.55206513030159}{8.458302263852103}
+    \mrcpoint{47.60652271644701}{8.58564576447632}
+    \mrcpoint{47.65002478441761}{8.475977737743394}
+    \mrcpoint{47.8129149100372}{8.621611270810012}
+    \mrcpoint{47.70405949548734}{8.824753417980977}
+    \mrcpoint{47.57118357939037}{9.373387060586875}
+    \mrcpoint{47.57763968687206}{9.783024034250792}
+    \mrcpoint{47.46598581489455}{10.09335967295321}
+    \mrcpoint{47.28014625489598}{10.22678291669482}
+    \mrcpoint{47.32098723021947}{10.40092026792467}
+    \mrcpoint{47.52413897927237}{10.53589647271817}
+    \mrcpoint{47.5130331145614}{10.94403341747166}
+    \mrcpoint{47.39097338968944}{11.04734763681045}
+    \mrcpoint{47.42252867275465}{11.44170163808758}
+    \mrcpoint{47.57832219946236}{11.64025530020549}
+    \mrcpoint{47.65203740659043}{12.2451260343467}
+    \mrcpoint{47.64005851006706}{12.78135708694006}
+    \mrcpoint{47.42189293170733}{13.06242166895717}
+    \mrcpoint{47.68727761120528}{13.13421507093485}
+    \mrcpoint{47.70570852317097}{12.97737528172392}
+    \mrcpoint{47.86836520373472}{12.94442906710615}
+    \mrcpoint{48.06063312315187}{12.76937524145701}
+    \mrcpoint{48.33220372303314}{13.38497370385176}
+    \mrcpoint{48.57060635511297}{13.55281830406328}
+    \mrcpoint{48.51465473490364}{13.78916086481733}
+    \mrcpoint{48.74889509826911}{13.84448153318651}
+    \mrcpoint{48.95974762545411}{13.50952525317658}
+    \mrcpoint{49.37838143356481}{12.77000417129028}
+    \mrcpoint{49.78495654813383}{12.44617209199484}
+    \mrcpoint{49.93155217044134}{12.49159565814237}
+    \mrcpoint{50.13144236663469}{12.24546848540114}
+    \mrcpoint{50.28771270517358}{12.30810150664619}
+    \mrcpoint{50.40989390494432}{12.94903619964524}
+    \mrcpoint{50.65841629251407}{13.3075062965852}
+    \mrcpoint{50.76329878585482}{13.97452403458363}
+    \mrcpoint{51.02604511746936}{14.41278607347103}
+    \mrcpoint{50.79185062876172}{14.80477069337384}
+    \mrcpoint{51.15202957355457}{14.99270251686064}
+    \mrcpoint{51.34128169635556}{15.02098384386006}
+    \mrcpoint{51.53750266315752}{14.74120138252564}
+    \mrcpoint{51.81924062442433}{14.62724686001225}
+    \mrcpoint{52.11180711219343}{14.70514397703483}
+    \mrcpoint{52.39266284958671}{14.60756306378661}
+    \mrcpoint{52.60597277515545}{14.58725108586684}
+    \mrcpoint{52.88134471470577}{14.16977248675916}
+    \mrcpoint{53.14560306739344}{14.4215985570986}
+    \mrcpoint{53.43447627332744}{14.39440456086107}
+    \mrcpoint{53.76080228279986}{14.26477636730856}
+    \mrcpoint{54.07894830697219}{13.84113247149844}
+    \mrcpoint{54.34144910466647}{13.71477685386829}
+    \mrcpoint{54.57879841452108}{13.41784866398943}
+    \mrcpoint{54.38430816973541}{12.55218424463898}
+    \mrcpoint{54.16285895583508}{12.11170524536321}
+    \mrcpoint{54.11909611435144}{11.78253136604545}
+    \mrcpoint{53.9629318241985}{11.23001765303107}
+    \mrcpoint{54.02548042559235}{10.82100535035693}
+    \mrcpoint{54.20942342601608}{11.17572026938692}
+    \mrcpoint{54.42622022041155}{11.04601054827628}
+    \mrcpoint{54.31534430886417}{10.73027571352005}
+    \mrcpoint{54.4430955768925}{10.19233706975044}
+    \mrcpoint{54.8317448735389}{10.00757468096804}
+    \mrcpoint{54.87986478845961}{9.659528688958062}
+    \mrcpoint{54.8308224503691}{9.271730840012292}
+    \mrcpoint{54.92302453288877}{8.571394535898566}
+    \mrcpoint{54.49119535498197}{8.900730234661252}
+    \mrcpoint{54.34335254823343}{8.645116397508792}
+    \mrcpoint{54.22420563732749}{8.880431477246834}
+    \mrcpoint{53.87404422621243}{8.679945700393079}
+    \mrcpoint{53.54658560722722}{8.286556227539295}
+    \mrcpoint{53.7066272365128}{8.034813408953866}
+    \mrcpoint{53.78031118673399}{7.387421106389351}
+    \mrcpoint{53.51218238635882}{6.930006752473437}
+    \mrcpoint{53.25894778199789}{7.171145313101468}
+    \mrcpoint{52.64374200661974}{6.997019504055286}
+    \mrcpoint{52.55662475372522}{6.719778263650637}
+    \mrcpoint{52.38988292317155}{6.970320972580792}
+    \mrcpoint{51.92299983362206}{6.742905287863996}
+    \mrcpoint{51.88316670940459}{6.156741607019097}
+    \mrcpoint{51.79567780329431}{5.98801954642294}
+    \mrcpoint{51.43928428452571}{6.159613225461791}
+    \mrcpoint{51.0215877919207}{5.887936542477828}
+    \mrcpoint{50.79077378475993}{5.983374968822379}
+    \mrcpoint{50.59470107381249}{6.228393825507839}
+    \mrcpoint{50.33147032961352}{6.304617231833176}
+    \mrcpoint{50.15747573005454}{6.092865298740861}
+    \mrcpoint{49.97845765993797}{6.16527138749146}
+    \mrcpoint{49.78369815200002}{6.535162836379246}
+    \mrcpoint{49.45067080157749}{6.378063336429978}
+    \mrcpoint{49.11701097547841}{6.794068795882435}
+    \mrcpoint{49.14800972775451}{7.494253217695865}
+    \mrcpoint{49.03198382192998}{7.640486837553122}
+    \mrcpoint{48.92859396692077}{8.238456398546767}
+    \mrcpoint{48.61606185482966}{7.832853167339047}
+    \mrcpoint{48.05389084062409}{7.510556381211842}
+    \mrcpoint{47.56795313962416}{7.588782160556193}
+    \mrcpoint{47.57268069220318}{8.07968771809688}
+  \end{mrcroute*}
+  \foreach \city / \name in {munich/M\"unchen, cologne/K\"oln,
+    hamburg/Hamburg, berlin/Berlin}
+    {
+      \mrcmarker{named position=\city,type=knob,fill=red!20,draw=red,
+        radius=2mm}
+      \mrcmarker{named position=\city,type=pin,fill=blue!10,draw=blue,
+        contents=\name}
+    }
+\end{tikzpicture}
+\end{dispExample*}
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Alignment of the Reference Position}
+
+With \refKey{/mermap/supply/align} the reference position can be aligned
+at different map positions.
+
+\tikzsetnextfilename{examples_alignment}%
+\begin{dispExample*}{center lower}
+\mrcNPdef{munich}{48.137222}{11.575556}
+\foreach \a in {east,center,west,north} {
+\begin{tikzpicture}
+  \mrcmap[type=reference,
+    named position=munich,
+    flex reference scale=1 000 000,
+    source=opentopomap,
+    tex width=\linewidth,tex height=3cm,
+    align=\a]{examples_alignment_\a}
+  \mrcdrawmap
+  \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+    {\mrcmapattribution};   \mrcclipmap
+  \tikzset{every node/.style={fill=white,fill opacity=0.8,text opacity=1}}
+  \path[draw] (mrcmap.south west) rectangle (mrcmap.north east);
+  \ifmrcNPinvicinity{munich}{
+    \fill[red] (mrcpos) circle (4pt) node[below] {M\"unchen};}{}
+  \node[text=red,above left] at (mrcmap.south east) {align=\a};
+\end{tikzpicture}
+\par}
+\end{dispExample*}
+
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Flexible Zoom}
+
+Map tiles are only provided at fixed zoom levels with natural numbers,
+but the package allows a \refKey{/mermap/flex zoom} with rational numbers.
+The flexible zoom is realized by combining a suitable fixed zoom with
+an adapted document tile scaling, see \Fullref{sec:flexible_tile_size}.
+The following example shows a more or less smooth zoom increase.
+The same technique is used by all options starting with |flex|, e.g.
+\refKey{/mermap/supply/flex reference scale}
+or \refKey{/mermap/supply/flex area fit}
+as seen in the examples before.
+
+\tikzexternaldisable
+\tikzsetnextfilename{examples_flex_zoom}%
+\begin{dispExample*}{center lower,breakable}
+% \mrcsetapikey{thunderforest}{YOUR-API-KEY}  % registered key
+\mrcNPdef{munich}{48.137222}{11.575556}
+\foreach \zz in {7.0,7.2,...,9.0} {
+\edef\z{\fpeval{round(\zz,1)}}
+\begin{tikzpicture}
+  \mermapset{flex zoom=\z}
+  \mrcmap[type=reference,
+      named position=munich,
+      source=thunderforest outdoors,
+      tex width=\linewidth,
+      tex height=3cm
+    ]{examples_flex_zoom_\z}
+  \mrcdrawmap
+  \mrcclipmap
+  \tikzset{every node/.style={fill=white,fill opacity=0.5,text opacity=1}}
+  \node[above,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+      {\mrcmapattribution};
+  \path[draw] (mrcmap.south west) rectangle (mrcmap.north east);
+  \node[below left=2mm,align=right] at (mrcmap.north east)
+    {flex zoom=\fpeval{round(\z,1)}\\ scale \mrcprettymapscale};
+  \ifmrcNPinvicinity{munich}{
+    \fill (mrcpos) circle (2pt) node[below] {M\"unchen};}{}
+\end{tikzpicture}\par}
+\end{dispExample*}
+
+
+
diff --git a/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.intro.tex b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.intro.tex
new file mode 100644
index 00000000000..294f5e278fc
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.intro.tex
@@ -0,0 +1,150 @@
+% !TeX root = mercatormap.tex
+% !TeX encoding=UTF-8
+% !TeX spellcheck=en_US
+% include file of mercatormap.tex (manual of the LaTeX package mercatormap)
+\clearpage
+\section{Introduction}%
+
+The \texttt{mercatormap} package enables map drawing with the
+Web Mercator projection. This is done as an extension to
+\tikzname\ \cite{package:tikz} with is complemented by a map
+coordinate system and many additional commands and options to add elements
+like markers, geodetic networks, bar scales, routes, orthodrome
+pieces, distance calculations, etc. Also, the seamless integration of graphics
+from public map tile servers is provided through a Python script.
+
+If you are interested in the mathematical background of the Web Mercator projection
+and the algorithms of this packages, you are invited to read
+\enquote{\fullcite{Sturm:2020}}.
+
+With very few exceptions, the package is programmed with the
+|expl3| \cite{package:expl3} programming interface for \LaTeX3
+and loads the packages
+|xparse| \cite{package:xparse} and |siunitx| \cite{package:siunitx}.
+
+\medskip
+
+
+\tikzsetnextfilename{intro_example}%
+\begin{tikzpicture}
+  \mrcmap[
+      type=reference,
+      position=48.1579577:11.4980376,
+      align=west,
+      flex reference scale=20000,
+      tex width=\linewidth,
+      tex height=5cm,
+      source=topplusopen web
+    ]{intro_example}
+  \mrcdrawmap
+  \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south) {\mrcmapattribution};
+  \node[above right, font=\sffamily\footnotesize] at (mrcmap.north west) {\mrcprettymapscale};
+  \mrcdrawscalebar[width-in-meter=800,partitions=8,north-east-outside=5mm;1.5mm,
+    major style={black!75}]
+  \path[every node/.style={above,inner sep=0.5mm,font=\sffamily\tiny}]
+    (mrcscalebar.north west) -- (mrcscalebar.north east)
+    node[pos=0]{0} node[pos=0.25]{200} node[pos=0.5]{400} node[pos=0.75]{600}
+    node[pos=1]{800} node[pos=1,right,yshift=-1mm]{m};
+  \mrcdrawnetwork
+  \mrcmarker{type=pin, draw=Blue_Gray, fill=Blue_Gray!10, font=\sffamily\footnotesize,
+    position=48.1582513:11.5032997, contents={Nymphenburg}}
+  \mrcclipmap
+  \draw (mrcmap.south west) rectangle (mrcmap.north east);
+\end{tikzpicture}
+
+
+
+%-------------------------------------------------------------------------------
+\subsection{Quick Start}
+
+The package is accompanied with a Python script. You should read
+\Fullref{sec:python} for the Python preparations.
+The package can be used in three ways:
+\begin{itemize}
+\item Completely without the Python script.
+  This is not recommended, because the usage will be quite restricted.
+\item With Python script, but without map tile download.
+  There is no usage restriction, but you have to create all content yourself.
+  To prevent map tile download, set
+  \begin{dispListing}
+  \mermapset{supply/target=none}
+  \end{dispListing}
+\item With Python script and map tile download.
+  You need permission and access to a map tile server.
+  \Fullref{sec:maptileserver} lists a selection of servers with free
+  access (some require registration of an API key).
+\end{itemize}
+
+After Python is prepared, you may try to compile
+|mercatormap-example.tex| (found in the documentation directory)
+which contains a map of Bavaria with map tile download.
+\Fullref{sec:examples} exhibits further examples which may serve as
+tutorials what can be done. After the examples you find the reference
+manual for the package.
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Installation of Python and Packages}\label{sec:python}
+
+A Python~3 script is part of the |mercatormap| package.
+The main purpose of this script is to download selected map tiles for
+the maps of the document. Also, some coordinate system computation is
+done by this script.
+
+\subsubsection{Python 3}
+Python 3 is a required prerequisite and can be downloaded from\\
+\url{https://www.python.org/downloads/}\\
+On systems like Linux Python is typically already installed.\par
+To test your installation, type into a command or terminal window:
+\begin{dispListing}
+  python --version
+\end{dispListing}
+This should give a version number starting with 3. Otherwise, try
+\begin{dispListing}
+  python3 --version
+\end{dispListing}
+If this is successful, \refKey{/mermap/python} has to be adapted to |python3|
+
+\subsubsection{Python Packages}
+The Python packages |Pillow| (\url{https://pypi.org/project/Pillow/})
+and |requests| (\url{https://pypi.org/project/requests/}) have to be present.
+With some luck, they are already installed. With
+\begin{dispListing}
+  pip3 list
+\end{dispListing}
+and/or
+\begin{dispListing}
+  pip3 list --user
+\end{dispListing}
+the installed packages are listed. If |Pillow| and |requests| are not
+among these package, they have to be added by
+\begin{dispListing}
+  pip3 install --user Pillow
+  pip3 install --user requests
+\end{dispListing}
+or
+\begin{dispListing}
+  pip3 install Pillow
+  pip3 install requests
+\end{dispListing}
+The second choice needs administrative rights and may give conflicts
+with package managers. Pythonians know furthers installation methods.
+
+\subsubsection{Document Setup}
+For your map document you need the following:
+\begin{itemize}
+\item Add \refCom{mrcactivatescript} to the document preamble.
+  Without this command, the script is not active.
+\item Compile the map document with the |--shell-escape| compiler option.
+  This allows to execute external programs like the Python script.\\
+  \textbf{Be aware that |-||-shell-escape| should only be used
+    with trusted documents. Note that external programs can do anything!}
+\end{itemize}
+
+
+
+
+%\subsection{Tutorial: Map without external Graphics}
+
+
+%\subsection{Tutorial: Map with downloaded Map Tiles}
diff --git a/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.limitations.tex b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.limitations.tex
new file mode 100644
index 00000000000..7529f8db199
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.limitations.tex
@@ -0,0 +1,300 @@
+% !TeX root = mercatormap.tex
+% !TeX encoding=UTF-8
+% !TeX spellcheck=en_US
+% include file of mercatormap.tex (manual of the LaTeX package mercatormap)
+\clearpage
+\section{Limitations and Caveats}%
+
+%-------------------------------------------------------------------------------
+\subsection{No Polar Regions}
+  The standard Mercator projection is not suited for north or south polar
+  regions.
+  The Web Mercator projections only covers
+  positions between \mrcformlat{-85.0511} and \mrcformlat{85.0511}
+  with map tiles. Equally, the |mercatormap| package does only provide support for
+  this area.
+
+  If your map overlaps to south of \mrcformlat{-85.0511} or to north of  \mrcformlat{85.0511},
+  compiler errors are possible because of internal computation limitations.
+  In any case, there are no map tiles.
+
+  \tikzsetnextfilename{limit_polar}%
+  \begin{dispExample}
+    \begin{tikzpicture}
+      \mrcmap[type=reference,latitude=-85.0511,longitude=0,zoom=3,
+        source=opentopomap,
+        tex width=\linewidth, tex height=8cm]{}
+      \mrcdrawmap
+      \node[above=4mm,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+          {\mrcmapattribution};
+      \mrcclipmap
+      \mrcdrawnetwork[network pieces=10,network distance=10mm]
+      \path[draw] (mrcmap.south west) rectangle (mrcmap.north east);
+      \mrcmarker{type=pin,position=-85.0511:0,
+        contents={End of the mapped world}}
+    \end{tikzpicture}
+  \end{dispExample}
+
+%-------------------------------------------------------------------------------
+\clearpage
+\subsection{International Dateline (180th Meridian)}\label{sec:dateline}
+  If your map includes the 180th meridian (more or less the international dateline),
+  remember that the eastern hemisphere lies \emph{west} and
+  the western hemisphere lies \emph{east} for your map.
+  Consider the following example displaying Vladivostok and Anchorage.
+  Here, \refKey{/mermap/supply/west} is set to \ang{130}\,E (|130|)
+  and \refKey{/mermap/supply/east} is set to \ang{149}\,W (|211| instead of |-149|).
+
+  There is some automatic correction for positions to fit inside the
+  defined map (see Anchorage in the example below), but
+  \emph{west} should be lower than \emph{east}.
+
+  \tikzsetnextfilename{limit_dateline}%
+  \begin{dispExample}
+    % \mrcsetapikey{openrouteservice}{YOUR-API-KEY}  % registered key
+    \begin{tikzpicture}
+      \mrcmap[type=areafit,tex width=\linewidth,tex height=8cm,
+        source=openrouteservice mapsurfer,
+        south=42,north=62,west=130,east=-149+360]{}
+        \mrcdrawmap
+        \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+          {\mrcmapattribution};
+        \mrcclipmap
+      \draw (mrcmap.south west) rectangle (mrcmap.north east);
+      \draw (mrc cs:lat=\mrcmapsouth,lon=180)
+        -- node[sloped,above] {180th meridian}
+           node[sloped,below,red] {add 360 to longitude for eastern border}
+      (mrc cs:lat=\mrcmapnorth,lon=180);
+      \mrcmarker{type=pin,position=61.22:-149.88,contents={Anchorage}}
+      \mrcmarker{type=pin,position=43.12:131.9,  contents={Vladivostok}}
+    \end{tikzpicture}
+  \end{dispExample}
+
+%-------------------------------------------------------------------------------
+\clearpage
+\subsection{Very small Scale Maps}
+  If a map has a very small scale, a coordinate point may appear more than once
+  on the map. But, the map coordinates of this package will only
+  pilot to a single point:
+
+  \tikzsetnextfilename{limit_small_scale_1}%
+  \begin{dispExample}
+    \begin{tikzpicture}
+      \mrcmap[type=reference,latitude=48.14,longitude=11.57,
+        source=opentopomap,
+        tex width=\linewidth,tex height=4cm,zoom=1]{}
+      \mrcdrawmap
+      \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+        {\mrcmapattribution};   \mrcclipmap
+      \path[draw] (mrcmap.south west) rectangle (mrcmap.north east);
+      \mrcmarker{type=pin,position=61.22:-149.88,contents={Anchorage}}
+      \mrcmarker{type=pin,position=43.12:131.9,contents={Vladivostok}}
+    \end{tikzpicture}
+  \end{dispExample}
+
+  You cannot trust too much in figures from
+  \refCom{mrcprettymapscale},
+  \refCom{mrcprettymapwidth},
+  \refCom{mrcprettymapheight}, etc
+  for large and medium scale maps.
+  For small scale maps, these figures are worse and even misleading.
+  Better do not use them:
+
+  \tikzsetnextfilename{limit_small_scale_2}%
+  \begin{dispExample}
+    \mermapset{supply/source=opentopomap}
+    \begin{tikzpicture}
+      \mrcmap[type=reference,latitude=48.14,longitude=11.57,
+        tex width=\linewidth,tex height=6cm,zoom=2]{}
+      \mrcdrawmap
+      \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+        {\mrcmapattribution};   \mrcclipmap  \mrcdrawinfo
+    \end{tikzpicture}
+  \end{dispExample}
+
+
+%-------------------------------------------------------------------------------
+\clearpage
+\subsection{Zoom is not Scale}
+
+  Using the same zoom value for different latitudes can give completely
+  different scales. The following example for Oslo and Rio de Janeiro
+  at zoom 12 scales to 1:151000 and otherwise 1:277000.
+  \tikzexternaldisable
+
+  \tikzsetnextfilename{limit_zoom_scale_1}
+  \begin{dispExample}
+    \mermapsetsupply{source=stamen terrain, type=reference, zoom=12,
+      tex width=7cm, tex height=5cm}
+    \begin{tikzpicture}
+      \mrcmap[latitude=59.91,longitude=10.75]{oslo1}   \mrcdrawmap
+    \end{tikzpicture}\hfill\begin{tikzpicture}
+      \mrcmap[latitude=-22.91,longitude=-43.20]{rio1}  \mrcdrawmap
+    \end{tikzpicture}
+    \begin{center}\fontsize{7pt}{7pt}\sffamily\mrcmapattribution\end{center}
+  \end{dispExample}
+
+  Same example again, but with \refKey{/mermap/flex scale} which gives
+  1:150000 for both cities and comparable maps.
+
+  \tikzsetnextfilename{limit_zoom_scale_2}
+  \begin{dispExample}
+    \mermapsetsupply{source=stamen terrain, type=reference}
+    \begin{tikzpicture}
+      \mrcmap[latitude=59.91,longitude=10.75, flex reference scale=150000,
+        tex width=7cm, tex height=5cm]{oslo2}    \mrcdrawmap
+    \end{tikzpicture}\hfill\begin{tikzpicture}
+      \mrcmap[latitude=-22.91,longitude=-43.20, flex reference scale=150000,
+        tex width=7cm, tex height=5cm]{rio2}     \mrcdrawmap
+    \end{tikzpicture}
+    \begin{center}\fontsize{7pt}{7pt}\sffamily\mrcmapattribution\end{center}
+  \end{dispExample}
+
+
+%-------------------------------------------------------------------------------
+\clearpage
+\subsection{Distances}
+
+There are at least three kinds of distance measures between two points
+on the map:
+\begin{itemize}
+\item Measure the distance with a ruler on the printed (or displayed) map
+  and multiply with the \refCom{mrcmapscaledenominator}.
+  Note that the map scale denominator is only (approximately) correct
+  for the map center.
+\item Compute the loxodromic distance, e.g. with \refCom{mrcstoreloxodistance}
+  which gives the (approximated) distance following a loxodrome.
+  On our Mercator map, this would be equal to the ruler method from above,
+  if the map scale would be constant.
+\item Compute the orthodromic distance, e.g. with \refCom{mrcstoreorthodistance}
+  which gives the (approximated) shortest distance following an orthodrome.
+\end{itemize}
+Apart from the approximate nature of the implementation, these distances
+are expected to be quite identical for large scale maps, but not for
+(very) small scale maps.
+
+\clearpage
+\tikzsetnextfilename{limit_distance1}%
+\begin{dispExample*}{}
+\begin{tikzpicture}
+  \mrcNPdef{munich}{48.137222}{11.575556}
+  \mrcNPdef{fraunberg}{48.3685075}{11.9894209}
+  \mrcmap[type=reference, named position=munich,
+    flex reference scale=1000000,
+    source=topplusopen web,
+    tex width=\linewidth, tex height=10cm]{}
+  \mrcdrawmap
+  \node[below left,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south east)
+        {\mrcmapattribution};
+  \node[below right,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south west)
+        {\mrcprettymapscale};
+  \mrcclipmap
+  \path[draw] (\mrcNPcs{munich}) circle (\mrckmtotex{40});
+  \node[above,fill=white,opacity=0.85,text opacity=1]
+    at ([yshift=\mrckmtotex{40}]\mrcNPcs{munich}) {\SI{40}{km}};
+  \draw[blue,very thick] (\mrcNPcs{munich}) -- (\mrcNPcs{fraunberg});
+  \mrcNPdraworthodrome[red,very thick] {munich}{fraunberg}
+  \path (\mrcNPcs{munich}) --
+    node[sloped,above=3mm,red,fill=white,opacity=0.85,text opacity=1]
+         { \mrcNPprettyorthodistance{munich}{fraunberg} }
+    node[sloped,below=3mm,blue,fill=white,opacity=0.85,text opacity=1]
+         { \mrcNPprettyloxodistance{munich}{fraunberg} }
+    (\mrcNPcs{fraunberg});
+  \mrcmarker{type=pin,named position=munich,contents={M\"unchen}}
+  \mrcmarker{type=pin,named position=fraunberg,contents={Fraunberg}}
+\end{tikzpicture}
+\end{dispExample*}
+
+\clearpage
+The next example gives notable different distances. The aberration is
+dependent from the center angle.
+
+\tikzsetnextfilename{limit_distance2}%
+\begin{dispExample*}{breakable}
+\begin{tikzpicture}
+  \mrcNPdef{munich}{48.137222}{11.575556}
+  \mrcNPdef{barcelona}{41.3947688}{2.0787285}
+  \mrcmap[type=reference, named position=munich,
+    flex reference scale=25000000,
+    source=topplusopen web,
+    tex width=\linewidth, tex height=10cm]{}
+  \mrcdrawmap
+  \node[below left,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south east)
+        {\mrcmapattribution};
+  \node[below right,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south west)
+        {\mrcprettymapscale};
+  \mrcclipmap
+  \path[draw] (\mrcNPcs{munich}) circle (\mrckmtotex{1000});
+  \node[above,fill=white,opacity=0.85,text opacity=1]
+    at ([yshift=\mrckmtotex{1000}]\mrcNPcs{munich}) {\SI{1000}{km}};
+  \draw[blue,very thick] (\mrcNPcs{munich}) -- (\mrcNPcs{barcelona});
+  \mrcNPdraworthodrome[red,very thick] {munich}{barcelona}
+  \path (\mrcNPcs{munich}) --
+    node[sloped,above=3mm,red,fill=white,opacity=0.85,text opacity=1]
+         { \mrcNPprettyorthodistance{munich}{barcelona} }
+    node[sloped,below=3mm,blue,fill=white,opacity=0.85,text opacity=1]
+         { \mrcNPprettyloxodistance{munich}{barcelona} }
+    (\mrcNPcs{barcelona});
+  \mrcmarker{type=pin,named position=munich,contents={M\"unchen}}
+  \mrcmarker{type=pinflip,named position=barcelona,contents={Barcelona}}
+\end{tikzpicture}
+\end{dispExample*}
+
+
+\clearpage
+The following small scale example contains unacceptable deviations from
+the displayed circle radius of \SI{3000}{\kilo\meter}. The aberration is
+highly dependent from the center angle. For such small scale maps,
+displaying a distance circle should be avoided.
+
+
+\tikzsetnextfilename{limit_distance3}%
+\begin{dispExample*}{breakable}
+\begin{tikzpicture}
+  \mrcNPdef{munich}{48.137222}{11.575556}
+  \mrcNPdef{neskaup}{65.1446431}{-13.7420082}
+  \mrcNPdef{atyrau}{47.0971204}{51.866263}
+  \mrcNPdef{dakhla}{24.2026691}{-15.4883971}
+  \mrcmap[type=reference, named position=munich,
+    flex reference scale=75000000,
+    source=topplusopen web,
+    tex width=\linewidth, tex height=10cm]{}
+  \mrcdrawmap
+  \node[below left,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south east)
+        {\mrcmapattribution};
+  \node[below right,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south west)
+        {\mrcprettymapscale};
+  \mrcclipmap
+  \path[draw] (\mrcNPcs{munich}) circle (\mrckmtotex{3000});
+  \node[above,fill=white,opacity=0.85,text opacity=1]
+    at ([yshift=\mrckmtotex{3000}]\mrcNPcs{munich}) {\SI{3000}{km}};
+  \draw[blue,very thick] (\mrcNPcs{munich}) -- (\mrcNPcs{neskaup});
+  \mrcNPdraworthodrome[red,very thick] {munich}{neskaup}
+  \path (\mrcNPcs{munich}) --
+    node[sloped,above=3mm,red,fill=white,opacity=0.85,text opacity=1]
+         { \mrcNPprettyorthodistance{munich}{neskaup} }
+    node[sloped,below=3mm,blue,fill=white,opacity=0.85,text opacity=1]
+         { \mrcNPprettyloxodistance{munich}{neskaup} }
+    (\mrcNPcs{neskaup});
+  \draw[blue,very thick] (\mrcNPcs{munich}) -- (\mrcNPcs{atyrau});
+  \mrcNPdraworthodrome[red,very thick] {munich}{atyrau}
+  \path (\mrcNPcs{munich}) --
+    node[sloped,above=3mm,red,fill=white,opacity=0.85,text opacity=1]
+         { \mrcNPprettyorthodistance{munich}{atyrau} }
+    node[sloped,below=3mm,blue,fill=white,opacity=0.85,text opacity=1]
+         { \mrcNPprettyloxodistance{munich}{atyrau} }
+    (\mrcNPcs{atyrau});
+  \draw[blue,very thick] (\mrcNPcs{munich}) -- (\mrcNPcs{dakhla});
+  \mrcNPdraworthodrome[red,very thick] {munich}{dakhla}
+  \path (\mrcNPcs{munich}) --
+    node[sloped,above=3mm,red,fill=white,opacity=0.85,text opacity=1]
+         { \mrcNPprettyorthodistance{munich}{dakhla} }
+    node[sloped,below=3mm,blue,fill=white,opacity=0.85,text opacity=1]
+         { \mrcNPprettyloxodistance{munich}{dakhla} }
+    (\mrcNPcs{dakhla});
+  \mrcmarker{type=pinflip,named position=munich,contents={M\"unchen}}
+  \mrcmarker{type=pin,named position=neskaup,contents={Neskaupsta\dh ur}}
+  \mrcmarker{type=pin,named position=atyrau,contents={Atyrau}}
+  \mrcmarker{type=pinflip,named position=dakhla,contents={Ad-Dakhla}}
+\end{tikzpicture}
+\end{dispExample*}
diff --git a/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.maptiles.tex b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.maptiles.tex
new file mode 100644
index 00000000000..c5289f537c2
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.maptiles.tex
@@ -0,0 +1,934 @@
+% !TeX root = mercatormap.tex
+% !TeX encoding=UTF-8
+% !TeX spellcheck=en_US
+% include file of mercatormap.tex (manual of the LaTeX package mercatormap)
+\clearpage
+\section{Automated Map Definition and Map Tiles}\label{sec:automated_map}%
+
+\begin{center}
+\begin{tikzpicture}[every node/.style={minimum width=3cm,minimum height=2cm,
+  align=center,fill=red!5,draw=red!50!gray}]
+\node (A) {Map Supply};
+\node[at=(A.east),right=8mm] (B) {Python Script};
+\node[at=(B.east),right=8mm] (C) {Map Apply};
+\node[at=(C.east),right=8mm] (D) {Map Drawing};
+\begin{scope}[->,very thick,Blue_Gray]
+\draw (A)--(B); \draw (B)--(C); \draw (C)--(D);
+\end{scope}
+\end{tikzpicture}
+\end{center}
+
+As illustrated above, the script aided map definition is a process with
+several stages.
+
+\begin{itemize}
+\item Map Supply: \refCom{mrcsupplymap} is the replacement of the manual setup by
+  \refCom{mrcdefinemap}. Actually, it is quite similar to \refCom{mrcdefinemap}.
+  With \refCom{mrcsupplymap} directions for the following Python script
+  are formulated.
+\item Python Script: The script is executed by \refCom{mrcsupplymap} during
+  compilation. It does some coordinate system computations and downloads
+  map tiles from a Web server. Finally, it writes a map definition into
+  a file \meta{id}|.def|.
+\item Map Apply: \refCom{mrcapplymap} reads and applies the
+  map definition from \meta{id}|.def|.
+\item Map Drawing: Afterwards, the map can be drawn by \refCom{mrcdrawmap}
+  and other commands.
+\end{itemize}
+
+A map can be applied more than once, e.g. reused later in the document.
+If this is not needed, map supply and map apply can be combined by
+\refCom{mrcmap}.
+
+
+%-------------------------------------------------------------------------------
+\subsection{Script Activation}
+
+Remember to install Python beforehand, see \Fullref{sec:python}.
+
+\begin{docCommand}{mrcactivatescript}{}
+  Use this inside the preamble of your document to activate the
+  accompanying Python script.
+  Without this command, the script is not executed!
+  If the document is final (or the maps are final),
+  this line could be removed and the document
+  should be compilable without script.
+\end{docCommand}
+
+
+\begin{docMrcKey}{python}{=\meta{python}}{no default, initially |python|}
+  Names the Python~3 interpreter as \meta{python}. If your Python~3 interpreter
+  is not called |python|, but e.g. |python3|, then use
+  \begin{dispListing}
+  \mermapset{python=python3}
+  \end{dispListing}
+\end{docMrcKey}
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Map Types}
+Currently, there are three methods provided how a map is computed by the
+accompanying Python script. The technical background is documented in
+\cite[Section~5]{Sturm:2020}.
+
+\begin{enumerate}
+\item \refKey{/mermap/supply/type}|=|\docValue{reference}:
+  \tcbsidebyside[sidebyside adapt=left,blankest,grow to left by=1cm]
+  {
+  \tikzexternaldisable
+  \begin{tikzpicture}
+  \useasboundingbox (0,0) rectangle (3,2);
+  \path[draw,fill=yellow!10] (0,0) rectangle (3,2);
+  \path[fill=red] (1.5,1) circle [radius=1mm];
+  \end{tikzpicture}
+  }{
+  The default method determines the map dimensions from a reference
+  position and given document map dimensions.
+  Also, a zoom level \refKey{/mermap/supply/zoom}
+  is required which relates to the Web Mercator map tile covering of the Earth.
+  A higher zoom level gives a growing number of smaller map tiles.
+  Alternative to the zoom level, a \meta{scale denominator} can be provided
+  by \refKey{/mermap/supply/flex area scale}, \refKey{/mermap/flex scale}
+  or \refKey{/mermap/supply/flex reference scale} which determines
+  the zoom level implicitly.
+  As default, the reference position is the center of the map, but can be
+  aligned at the map borders. This method is quite safe to use and could
+  be the preferred one for many applications like showing the neighborhood
+  of a route target.
+  Finding the best reference point for depicting a certain area could
+  be more tricky.
+  }
+
+\item \refKey{/mermap/supply/type}|=|\docValue{areafit}:
+  \tcbsidebyside[sidebyside adapt=left,blankest,grow to left by=1cm]
+  {
+  \tikzexternaldisable
+  \begin{tikzpicture}
+  \useasboundingbox (0,0) rectangle (3,2);
+  \path[draw,fill=yellow!10] (0,0) rectangle (3,2);
+  \path[draw=red,line width=0.5mm] (0.2,0.5) rectangle (2.8,1.5);
+  \end{tikzpicture}
+  }
+  {
+  The map dimensions are determined by an area with
+  latitude and longitude boundaries which is fitted into given
+  document map dimensions. The zoom level is computed accordingly
+  for a fixed document tile size or by \refKey{/mermap/supply/flex area fit}.
+  In any case, the map contains the target area plus some protrusion.
+  This method is also quite safe to use and may be
+  the preferred one for many applications like showing a map which contains
+  a bunch of markers (e.g. for locations of universities).
+  If the map borders are required to exactly meet the boundaries,
+  the third method can be regarded.
+  }
+
+\item \refKey{/mermap/supply/type}|=|\docValue{boundaries}:
+  \tcbsidebyside[sidebyside adapt=left,blankest,grow to left by=1cm]
+  {
+  \tikzexternaldisable
+  \begin{tikzpicture}
+  \useasboundingbox (0,0) rectangle (3,2);
+  \path[draw=red,line width=0.5mm,fill=yellow!10] (0.2,0.5) rectangle (2.8,1.5);
+  \end{tikzpicture}
+  }{
+  The most obvious method determines the map dimensions from
+  latitude and longitude boundaries. For this, a corresponding zoom level
+  \refKey{/mermap/supply/zoom}
+  is required which relates to the Web Mercator map tile covering of the Earth.
+  Alternative to the zoom level, a \meta{scale denominator} can be provided
+  by \refKey{/mermap/supply/flex area scale}
+  or \refKey{/mermap/supply/flex reference scale} which determines
+  the zoom level implicitly.
+  Note that a too high zoom level imposes the risk of downloading an unwanted
+  high quantity of map tiles resulting in a much too large document map.
+  Therefore, this most obvious method is \emph{not recommended} for the
+  beginner and may be explored after some experience.
+  }
+\end{enumerate}
+
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Map Supply}
+
+\begin{docCommand}{mrcsupplymap}{\oarg{options}\marg{definition}}
+  The \meta{options} provide parameters for the Python~3 script to supply all
+  materials for a map.
+  All options share the common prefix |/mermap/supply/|.\par
+  The map is identified by\\
+  \meta{id}=\refKey{/mermap/definition prefix}+\meta{definition}\\
+  for later drawing.
+  This identifier \meta{id} has to be unique for the document.
+  It corresponds to generated files \meta{id}|.def|, \meta{id}|.md5|, and
+  possibly \meta{id}|.png|.
+  Do not use spaces or special characters like umlauts for \meta{definition}.
+  \par
+  If \refCom{mrcactivatescript} is used inside the preamble,
+  \refCom{mrcsupplymap} executes the Python~3 script, otherwise nothing happens.
+\end{docCommand}
+
+
+\begin{docCommand}{mermapsetsupply}{\marg{options}}
+  Sets \meta{options} for all following maps inside the current \TeX\ group.
+  All options share the common prefix |/mermap/supply/|, e.g. for setting
+  \refKey{/mermap/supply/type} use
+  \begin{dispListing}
+    \mermapsetsupply{type=reference}
+  \end{dispListing}
+  Also see \refCom{mermapset} and \refCom{mermapsetmarker}.
+\end{docCommand}
+
+
+\begin{docMrcKey}{definition prefix}{=\meta{definition prefix}}{no default, initially |maps/|}
+  Prefix for map identifiers and generated map files, see \refCom{mrcsupplymap}
+  and \refCom{mrcapplymap}.
+  Note that \refKey{/mermap/definition prefix} is not to be used inside
+  the option list for \refCom{mrcsupplymap}.
+\end{docMrcKey}
+
+\begin{docMrcKey}{supply/type}{=\meta{type}}{no default, initially |reference|}
+  The \meta{type} defines the basic computation for the map. Feasible values are
+  \begin{itemize}
+  \item\docValue{reference}: \flqq map with reference position\frqq\\
+    The map is constructed from a given reference position
+    \refKey{/mermap/supply/latitude},\\
+    \refKey{/mermap/supply/longitude},\\
+    a zoom level \refKey{/mermap/supply/zoom},\\
+    map dimensions\\
+    \refKey{/mermap/supply/width},\\
+    \refKey{/mermap/supply/height},\\
+    and alignment \refKey{/mermap/supply/align}.
+  \item\docValue{areafit}: \flqq map fitting an area\frqq\\
+    The map is constructed from a given area boundaries\\
+    \refKey{/mermap/supply/west},\\
+    \refKey{/mermap/supply/east},\\
+    \refKey{/mermap/supply/north},\\
+    \refKey{/mermap/supply/south},\\
+    map dimensions\\
+    \refKey{/mermap/supply/width},\\
+    \refKey{/mermap/supply/height},\\
+    and alignment \refKey{/mermap/supply/align}.
+  \item\docValue{boundaries}: \flqq map with boundaries\frqq\\
+    The map is constructed from given boundaries\\
+    \refKey{/mermap/supply/west},\\
+    \refKey{/mermap/supply/east},\\
+    \refKey{/mermap/supply/north},\\
+    \refKey{/mermap/supply/south},\\
+    and zoom level \refKey{/mermap/supply/zoom}.
+  \end{itemize}
+\end{docMrcKey}
+
+\begin{docMrcKey}{supply/zoom}{=\meta{setup zoom}}{no default, initially |9|}
+  Map tile zoom factor alias $z$ coordinate of the map tiles.
+  Used for map types \docValue{boundaries} and \docValue{reference}.
+\end{docMrcKey}
+
+\begin{docMrcKey}{supply/north}{=\meta{setup north latitude}}{no default, initially |50|}
+  Northern latitude degree, possibly negative for the southern hemisphere,
+  lower than $90$ but always larger than \refKey{/mermap/supply/south}.
+  Used for map types \docValue{boundaries} and \docValue{areafit}.
+\end{docMrcKey}
+
+\begin{docMrcKey}{supply/south}{=\meta{setup south latitude}}{no default, initially |48|}
+  Southern latitude degree, possibly negative for the southern hemisphere,
+  larger than $-90$ but always lower than \refKey{/mermap/supply/north}.
+  Used for map types \docValue{boundaries} and \docValue{areafit}.
+\end{docMrcKey}
+
+\begin{docMrcKey}{supply/west}{=\meta{setup west longitude}}{no default, initially |11|}
+  Western longitude degree, possibly negative for the western hemisphere,
+  possibly shifted periodically, but always lower than \refKey{/mermap/supply/east}.
+  Used for map types \docValue{boundaries} and \docValue{areafit}.
+\end{docMrcKey}
+
+\begin{docMrcKey}{supply/east}{=\meta{setup east longitude}}{no default, initially |13|}
+  Eastern longitude degree, possibly negative for the western hemisphere,
+  possibly shifted periodically, but always larger than \refKey{/mermap/supply/west}.
+  Used for map types \docValue{boundaries} and \docValue{areafit}.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{supply/area}{=\marg{comma separated list of named positions}}{no default}
+  Sets
+  \refKey{/mermap/supply/north}, \refKey{/mermap/supply/south},
+  \refKey{/mermap/supply/west}, \refKey{/mermap/supply/east}
+  according to the given \meta{comma separated list of named positions}, i.e.
+  the described area contains all these positions.
+  Note that you need at least two points inside the list.
+  Also note to take special care, if the international dateline is on your
+  resulting map, see \Fullref{sec:dateline}.
+  Used for map types \docValue{boundaries} and \docValue{areafit}.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{supply/add area}{=\marg{comma separated list of named positions}}{no default}
+  Nearly identical to \refKey{/mermap/supply/area}, but
+  the given \meta{comma separated list of named positions}
+  does not reset the current area, i.e. the positions are added to the
+  current area which possibly grows to fit all positions.
+  Used for map types \docValue{boundaries} and \docValue{areafit}.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{supply/area to reference}{}{no value, initially unset}
+  The map settings
+  \refKey{/mermap/supply/north}, \refKey{/mermap/supply/south},
+  \refKey{/mermap/supply/west}, \refKey{/mermap/supply/east}
+  are taken to compute the map center. This center position is saved
+  to \refKey{/mermap/supply/latitude} and \refKey{/mermap/supply/longitude}.
+  Used for map type \docValue{reference}.
+\end{docMrcKey}
+
+
+
+\begin{docMrcKey}{supply/latitude}{=\meta{setup latitude}}{no default, initially |49|}
+  Latitude degree of a reference point, possibly negative for the southern hemisphere.
+  Used for map type \docValue{reference}.
+\end{docMrcKey}
+
+\begin{docMrcKey}{supply/longitude}{=\meta{setup longitude}}{no default, initially |12|}
+  Longitude degree of a reference point, possibly negative for the western hemisphere.
+  Used for map type \docValue{reference}.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{supply/position}{=\meta{setup latitude}:\meta{setup longitude}}{no default, initially |49:12|}
+  Latitude degree and longitude of a reference point.
+  Used for map type \docValue{reference}.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{supply/named position}{=\meta{name}}{style, no default}
+  The \emph{named position} given by \meta{name} describes
+  a reference point, see \Fullref{sec:names_positions}.
+  Used for map type \docValue{reference}.
+\end{docMrcKey}
+
+
+\pagebreak
+\begin{docMrcKey}{supply/width}{=\meta{setup width in tiles}}{no default, initially |4|}
+  Width of the map as multiplicity of map tiles.
+  Used for map types \docValue{reference} and \docValue{areafit}.
+\end{docMrcKey}
+
+\begin{docMrcKey}{supply/tex width}{=\meta{width}}{style, no default}
+  Width of the map as \TeX\ dimension.
+  This is a style to compute \refKey{/mermap/supply/width} according to
+  the current \refKey{/mermap/tile size}.
+\end{docMrcKey}
+
+\begin{docMrcKey}{supply/height}{=\meta{setup height in tiles}}{no default, initially |4|}
+  Height of the map as multiplicity of map tiles.
+  Used for map types \docValue{reference} and \docValue{areafit}.
+\end{docMrcKey}
+
+\begin{docMrcKey}{supply/tex height}{=\meta{width}}{style, no default}
+  Height of the map as \TeX\ dimension.
+  This is a style to compute \refKey{/mermap/supply/height} according to
+  the current \refKey{/mermap/tile size}.
+\end{docMrcKey}
+
+\begin{docMrcKey}{supply/align}{=\meta{setup alignment}}{no default, initially |center|}
+  Alignment of reference point or area for map types \docValue{reference} and \docValue{areafit}.
+  Feasible values are
+  \docValue{northwest}, \docValue{north}, \docValue{northeast}, \docValue{west},
+  \docValue{center}, \docValue{east}, \docValue{southwest},\docValue{south}, \docValue{southeast}.
+\end{docMrcKey}
+
+\begin{docMrcKey}{supply/target}{=\meta{setup target}}{no default, initially |tiles|}
+  Defines the type of output for the Python~3 script. Feasible values are:
+  \begin{itemize}
+  \item\docValue{none}: No tiles are downloaded and no merged map is generated, just map computation.
+    This is the fastest method and needs no tile supplier.
+  \item\docValue{tiles}: Download map tiles from a tile map service (TMS) \refKey{/mermap/supply/url}.
+    Compilation of a document with map tile takes longer than compilation
+    with a merged map and transparency should not be used with tiles,
+    but the resulting document is smaller than a document with merged maps.
+  \item\docValue{mergedmap}: Download map tiles from a tile map service (TMS)
+    \refKey{/mermap/supply/url} and merge them into a single map picture.
+    This speeds compilation and allows transparency effects, but
+    the resulting document is possibly larger than a document with map tiles,
+    because map tiles often are optimized 8-bit image files while the merged
+    image is a 24-bit PNG file. Additionally, synergy effects of using the same map tiles
+    for different maps are lost.
+    Also, since the pixel map is clipped to full pixels, the resulting map
+    may differ (shift/size) from the more accurate tile representation by
+    one pixel.
+  \item\docValue{wmsmap}: Download a single map from a web map service (WMS)
+    \refKey{/mermap/supply/url}. Internally, the package treats a WMS like
+    a tile map service including all tile calculations. Actually, a single
+    file is downloaded.
+  \end{itemize}
+\end{docMrcKey}
+
+
+\clearpage
+\begin{docMrcKey}{supply/url}{=\meta{setup URL}}{no default, initially empty}
+  Here, the url format with placeholder |{z}{x}{y}| for map tile download is defined.
+  \textbf{Be sure that you have the permission to download, save, and use
+  the map tiles from that URL. Illegal downloads are not endorsed in any
+  way.}
+  \begin{dispListing}
+    url={https://abc.efg.hij/{z}/{x}/{y}.png?apikey=12345678},
+  \end{dispListing}
+  See \Fullref{sec:maptileserver} for predefined URLs.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{supply/url with api key}{=\marg{prefix}\marg{name}\marg{postfix}}{no default}
+  This is an alternative version of \refKey{/mermap/supply/url}.
+  The URL is constructed from some fixed \meta{prefix} and \meta{postfix} with
+  an API key in between. The API key is retrieved by \meta{name} from a
+  repository filled by \refCom{mrcsetapikey}.
+  \begin{dispListing}
+    url={https://abc.efg.hij/{z}/{x}/{y}.png?apikey=}{myservice}{},
+  \end{dispListing}
+  See \Fullref{sec:maptileserver} for predefined URLs.
+\end{docMrcKey}
+
+
+\begin{docCommand}{mrcsetapikey}{\marg{name}\marg{value}}
+  Stores an API key \meta{value} for access with the given \meta{name}.
+  Typically, \meta{value} is a received ID from a map tile service provider
+  after personal registration. \meta{name} is a placeholder which is used
+  inside \refKey{/mermap/supply/url with api key} to mark the insertion
+  point for the API key.
+  \begin{dispListing}
+    \mrcsetapikey{myservice}{....K942XY....}
+  \end{dispListing}
+\end{docCommand}
+
+
+
+\begin{docMrcKey}{supply/attribution}{=\meta{attribution text}}{no default, initially empty}
+  Attribution text for the map source. Typically, it acknowledges the copyright
+  of the map data provider. It may contain hyperlinks.
+  It is used to set up \refKey{/mermap/mapdef/attribution} afterwards
+  and it is accessible as \docAuxCommand{mrcmapattribution} (use read-only).\par
+  For technical reasons, do not use \verb+"+. \docAuxCommand{mrcumlaut}
+  may be used for masking umlauts, e.g. use \verb+\mrcumlaut{u}+ instead of
+  \verb+\"{u}+, but umlauts can also be used directly, e.g. as UTF-8 coded characters.
+\end{docMrcKey}
+
+\begin{docMrcKey}{supply/attribution print}{=\meta{attribution text}}{no default, initially empty}
+  Attribution text for the map source.
+  In contrast to \refKey{/mermap/supply/attribution} it is intended for media
+  that does not support hyperlinks like printed posters, books, etc.
+  It is used to set up \refKey{/mermap/mapdef/attribution print} afterwards
+  and it is accessible as \docAuxCommand{mrcmapattributionprint} (use read-only).
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{supply/basename}{=\meta{setup tile base name}}{no default, initially \texttt{tiles/tile}}
+  Prefix for local tile files, e.g. '|tiles/map|' for '|tiles/map_10_10_10.png|'.
+\end{docMrcKey}
+
+
+\clearpage
+\begin{docMrcKey}{supply/flex reference scale}{=\meta{scale denominator}}{no default}
+  With the given \meta{scale denominator}, an appropriate \refKey{/mermap/supply/zoom}
+  and \refKey{/mermap/tile size} is computed. Note that
+  the \meta{scale denominator}
+  always applies to the current \refKey{/mermap/supply/latitude}
+  and is used for map type \docValue{boundaries} and \docValue{reference}.
+  For example, if the reference point is on the north side of the map,
+  also the \meta{scale denominator}
+  applies to the most northern latitude.
+
+  Note to take special care to the order of the options.
+  \begin{itemize}
+  \item The reference point has to be set \emph{before}
+    \refKey{/mermap/supply/flex reference scale}, e.g. by
+    \refKey{/mermap/supply/latitude}, \refKey{/mermap/supply/position},
+    \refKey{/mermap/supply/named position}.
+  \item \refKey{/mermap/supply/tex height}, \refKey{/mermap/supply/tex width}
+    (only for map type \docValue{reference})
+    have to be set \emph{after} \refKey{/mermap/supply/flex reference scale},
+    because the \refKey{/mermap/tile size} is adapted.
+  \end{itemize}
+  Also see \refKey{/mermap/flex tile size}, \refKey{/mermap/flex zoom},
+  and \refKey{/mermap/flex scale}.
+\tikzsetnextfilename{maptiles_flex_reference_scale}%
+\begin{dispExample}
+\begin{tikzpicture}
+  \mrcmap[type=reference,latitude=48.14,longitude=11.57,
+    flex reference scale=250000,
+    source=opentopomap,
+    tex width=\linewidth,tex height=5cm]{}
+  \mrcdrawmap
+  \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+        {\mrcmapattribution};
+  \mrcclipmap
+  \path[draw] (mrcmap.south west) rectangle (mrcmap.north east);
+  \node[below left=2mm,align=right,fill=white,fill opacity=0.5,
+    text opacity=1] at (mrcmap.north east) {scale \mrcprettymapscale};
+\end{tikzpicture}
+\end{dispExample}
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{supply/flex area scale}{=\meta{scale denominator}}{no default}
+  This is a shortcut for setting \refKey{/mermap/supply/area to reference}
+  and \refKey{/mermap/supply/flex reference scale}=\meta{scale denominator}.
+  Used for map type \docValue{boundaries} and \docValue{reference}.
+
+  Note to take special care to the order of the options.
+  \begin{itemize}
+  \item The reference point has to be set \emph{before}
+    \refKey{/mermap/supply/flex area scale}.
+  \item \refKey{/mermap/supply/tex height}, \refKey{/mermap/supply/tex width}
+    (only for map type \docValue{reference})
+    have to be set \emph{after} \refKey{/mermap/supply/flex reference scale}.
+  \end{itemize}
+\end{docMrcKey}
+
+
+\clearpage
+\begin{docMrcKey}{supply/flex area fit}{\colOpt{=\meta{size}}}{default |0pt|}
+  This key can be used for map type \docValue{areafit} as \emph{final}
+  option \emph{after} all other options.
+  It applies a fine tuning to \refKey{/mermap/tile size},
+  \refKey{/mermap/supply/width}, and \refKey{/mermap/supply/height} such
+  that the defined area fits exactly into the map region.
+  If a \meta{size} is specified, width and height are reduced for the
+  calculation by this \meta{size}, e.g. \meta{size}|=1cm| ensures a
+  border of |5mm| on each side.
+  Also see \refKey{/mermap/flex tile size} and \refKey{/mermap/flex zoom}.
+
+\tikzsetnextfilename{maptiles_flex_area_fit}%
+\begin{dispExample}
+\begin{tikzpicture}
+  \mrcNPdef{munich}{48.14}{11.58}
+  \mrcNPdef{rio}{-22.91}{-43.20}
+  \mrcNPdef{newyork}{40.71}{-74.01}
+  \mrcmap[  type = areafit, area = {munich,rio,newyork},
+    source=topplusopen web grau,
+    tex width=\linewidth, tex height=7cm,
+    flex area fit=1cm ]{}
+  \mrcdrawmap
+  \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+        {\mrcmapattribution};
+  \draw[yellow] ([xshift=5mm,yshift=5mm]mrcmap.south west) rectangle
+                ([xshift=-5mm,yshift=-5mm]mrcmap.north east);
+  \draw[red,fill=red!50!gray!50!white,fill opacity=0.25]
+    (\mrcNPcs{newyork}) -- (\mrcNPcs{rio}) -- (\mrcNPcs{munich}) -- cycle;
+\end{tikzpicture}
+\end{dispExample}
+\end{docMrcKey}
+
+
+
+
+\clearpage
+\begin{docMrcKey}{supply/pixel}{=\meta{setup pixel size}}{no default, initially |256|}
+  Pixel width (and height) of a tile. It is especially needed for
+  target \docValue{mergedmap} and also \docValue{wmsmap}.
+  For \docValue{wmsmap}, it is multiplied with a pseudo tile calculation
+  to compute the actual picture size to download.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{supply/dpi}{=\meta{dpi value}}{style, no default}
+  This style sets \refKey{/mermap/supply/pixel} such that the given \meta{dpi value}
+  is resulting (approximately).
+  \begin{itemize}
+  \item Note that this only applies for WMS Servers and not for
+    TMS (Tile Map Service) Servers,
+    because there \refKey{/mermap/supply/pixel} is a fixed number depending on
+    Server settings and cannot be chosen arbitrarily.
+  \item A high \meta{dpi value} results in large downloaded map files.
+    If the server does not provide a high resolution map, you will get
+    unnecessary large files with blurred content.
+  \item The \meta{dpi value} for TMS data can be changed by adapting
+    \refKey{/mermap/tile size} or \refKey{/mermap/flex tile size}.
+  \end{itemize}
+
+\tikzsetnextfilename{maptiles_dpi_value}
+\begin{dispExample}
+\begin{tikzpicture}
+  \mrcmap[type=reference,latitude=48.14,longitude=11.57,
+    flex reference scale=250000,
+    source=topplusopen p250, target=wmsmap, dpi=300,
+    tex width=\linewidth,tex height=5cm]{dpi_value}
+  \mrcdrawmap
+  \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+        {\mrcmapattribution};
+  \mrcclipmap
+  \path[draw] (mrcmap.south west) rectangle (mrcmap.north east);
+\end{tikzpicture}
+\end{dispExample}
+
+\end{docMrcKey}
+
+
+
+
+
+%-------------------------------------------------------------------------------
+\subsection{Map Apply}
+
+\begin{docCommand}{mrcapplymap}{\marg{definition}}
+  A map which is supplied by \refCom{mrcsupplymap} is applied
+  inside a |tikzpicture| environment by
+  \refCom{mrcapplymap} where \meta{definition} identifies the map.
+  \refCom{mrcapplymap} replaces a manual setup by \refCom{mrcdefinemap}.
+  The same map can be applied more than once inside a document.
+  Note that applying a map does not mean to draw the map, but to prepare
+  everything for drawing.
+\end{docCommand}
+
+
+\begin{docCommand}{mrcmap}{\oarg{options}\marg{definition}}
+  This is a combination of
+  \refCom{mrcsupplymap} with the given \meta{options}
+  followed immediately by \refCom{mrcapplymap}.
+  If \meta{definition} is left empty, an automated unique identifier is
+  inserted.
+  If a map is to be used just once, \refCom{mrcmap} may be preferred.
+\end{docCommand}
+
+
+
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Map Tile Server}\label{sec:maptileserver}
+
+
+To use map tiles with this package you obviously need access to a map tile server.
+Thanks to all the many contributors to
+\href{https://openstreetmap.org/copyright}{OpenStreetMap},
+map data is free for everyone to use.
+\textbf{But, map tile servers based on OpenStreetMap are not necessarily free}.
+
+A list of online raster tile servers based on OpenStreetMap data is found here:\\
+\url{https://wiki.openstreetmap.org/wiki/Tile_servers}
+
+\begin{itemize}
+\item\bfseries I do not run a map tile server.
+\item I do not and cannot grant any permission to access a map tile server.
+\item I do not and cannot grant any permission to use map tiles in
+  private, academic, free, or commercial publications.
+\item All operators of map tile servers require to mention an attribution
+  for their maps.
+\end{itemize}
+
+The following option allows easy usage of very few selected tile servers.
+The tile server of \href{https://openstreetmap.org/copyright}{OpenStreetMap}
+is not included because of its
+\href{https://operations.osmfoundation.org/policies/tiles/}{Tile Usage Policy}.
+I am aware that the following list could be enlarged much more, but I do not
+want to add more to avoid any legal uncertainties.
+
+\begin{itemize}
+\item\bfseries I will remove an entry immediately, if the tile server operator
+  asks for it.
+\item\mdseries If \textbf{YOU} operate a tile server and you want an entry here, I would be
+  glad to add it to the following list.
+\end{itemize}
+
+\medskip
+\begin{docMrcKey}{supply/source}{=\meta{source}}{style, no default}
+  This style sets \refKey{/mermap/supply/url}, \refKey{/mermap/supply/attribution},\\
+  \refKey{/mermap/supply/attribution print} and \refKey{/mermap/supply/basename}.\\
+  Feasible values for \meta{source} are:
+  %\mermapset{tile size=3.2512cm}
+  \newcommand{\mapexample}[3][]{%
+    \begingroup
+    \mermapset{supply/source=#2}%
+    \begin{itemize}
+    \item Required attribution (\docAuxCommand{mrcmapattribution}):
+      \begin{tcolorbox}[sharp corners,size=fbox,colback=yellow!8,colframe=yellow!80!gray,halign=flush left]
+        \mrcmapattribution\end{tcolorbox}
+    \item Required attribution for media without hyperlinks (\docAuxCommand{mrcmapattributionprint}):
+      \begin{tcolorbox}[sharp corners,size=fbox,colback=yellow!8,colframe=yellow!80!gray,halign=flush left]
+        \mrcmapattributionprint\end{tcolorbox}
+    %\par\smallskip\
+    \end{itemize}
+    \endgroup\par\smallskip\tikzsetnextfilename{maptiles_#3}%
+    \begin{tikzpicture}
+    \mrcmap[source=#2,
+      type=reference,latitude=48.14,longitude=11.58,zoom=7,
+      tex width=\linewidth,tex height=2cm,#1]{#3}
+      \mrcdrawmap
+      \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+        {\mrcmapattribution};
+    \end{tikzpicture}\par%
+  }%
+  \begin{itemize}
+
+  \item\docValue{dummy}:\\
+    Dummy tile server at loopback |127.0.0.1| for test purposes.
+
+  \item\docValue{opentopomap}:\\
+    Tile server (TMS) of \href{http://opentopomap.org/}{OpenTopoMap}.
+    \begin{itemize}
+    \item Usage (German language): \url{https://opentopomap.org/about#verwendung}
+    \end{itemize}
+    \mapexample{opentopomap}{opentopomap}
+
+\clearpage
+  \item\docValue{openrouteservice mapsurfer}:\\
+    Tile server of \href{https://openrouteservice.org/}{OpenRouteService}.\\
+    A registered \meta{api-key} is needed (free plan available)
+    which is applied by\\
+    \refCom{mrcsetapikey}\brackets{\docValue{openrouteservice}}\marg{api-key}.\\
+    Usage: \url{https://openrouteservice.org/terms-of-service/}\\
+    API documentation: \url{https://openrouteservice.org/dev/#/api-docs}
+    \mapexample{openrouteservice mapsurfer}{openrouteservice_mapsurfer}
+
+  \item\docValue{stamen terrain}:\\
+    Tile server of \href{http://stamen.com}{Stamen Design}.\\
+    Usage: \url{http://maps.stamen.com/#terrain}
+    \mapexample{stamen terrain}{stamen_terrain}
+
+  \item\docValue{stamen terrain-background}:\\
+    Tile server of \href{http://stamen.com}{Stamen Design}.\\
+    Usage: \url{http://maps.stamen.com/#terrain-background}
+    \mapexample{stamen terrain-background}{stamen_terrain-background}
+
+\clearpage
+  \item\docValue{stamen terrain-labels}:\\
+    Tile server of \href{http://stamen.com}{Stamen Design}.\\
+    Usage: \url{http://maps.stamen.com/#terrain-labels}
+    \mapexample{stamen terrain-labels}{stamen_terrain-labels}
+
+  \item\docValue{stamen terrain-lines}:\\
+    Tile server of \href{http://stamen.com}{Stamen Design}.\\
+    Usage: \url{http://maps.stamen.com/#terrain-lines}
+    \mapexample{stamen terrain-lines}{stamen_terrain-lines}
+
+  \item\docValue{stamen toner}:\\
+    Tile server of \href{http://stamen.com}{Stamen Design}.\\
+    Usage: \url{http://maps.stamen.com/#toner}
+    \mapexample{stamen toner}{stamen_toner}
+
+\clearpage
+  \item\docValue{stamen toner-lite}:\\
+    Tile server of \href{http://stamen.com}{Stamen Design}.\\
+    Usage: \url{http://maps.stamen.com/#toner-lite}
+    \mapexample{stamen toner-lite}{stamen_toner-lite}
+
+  \item\docValue{stamen toner-hybrid}:\\
+    Tile server of \href{http://stamen.com}{Stamen Design}.\\
+    Usage: \url{http://maps.stamen.com/#toner-hybrid}
+    \mapexample{stamen toner-hybrid}{stamen_toner-hybrid}
+
+  \item\docValue{stamen toner-background}:\\
+    Tile server of \href{http://stamen.com}{Stamen Design}.\\
+    Usage: \url{http://maps.stamen.com/#toner-background}
+    \mapexample{stamen toner-background}{stamen_toner-background}
+
+\clearpage
+  \item\docValue{stamen toner-labels}:\\
+    Tile server of \href{http://stamen.com}{Stamen Design}.\\
+    Usage: \url{http://maps.stamen.com/#toner-labels}
+    \mapexample{stamen toner-labels}{stamen_toner-labels}
+
+  \item\docValue{stamen toner-lines}:\\
+    Tile server of \href{http://stamen.com}{Stamen Design}.\\
+    Usage: \url{http://maps.stamen.com/#toner-lines}
+    \mapexample{stamen toner-lines}{stamen_toner-lines}
+
+  \item\docValue{stamen watercolor}:\\
+    Tile server of \href{http://stamen.com}{Stamen Design}.\\
+    Usage: \url{http://maps.stamen.com/#watercolor}
+    \mapexample{stamen watercolor}{stamen_watercolor}
+
+\clearpage
+  \item\docValue{thunderforest opencyclemap}:\\
+    Tile server of \href{https://www.thunderforest.com}{Thunderforest}.\\
+    A registered \meta{api-key} is needed (free plan available)
+    which is applied by\\
+    \refCom{mrcsetapikey}\brackets{\docValue{thunderforest}}\marg{api-key}.
+    \begin{itemize}
+    \item Usage: \url{https://www.thunderforest.com/terms}
+    \item API documentation: \url{https://www.thunderforest.com/maps/opencyclemap}
+    \end{itemize}
+    \mapexample{thunderforest opencyclemap}{thunderforest_opencyclemap}
+
+  \item\docValue{thunderforest transport}:\\
+    Tile server of \href{https://www.thunderforest.com}{Thunderforest}.\\
+    A registered \meta{api-key} is needed (free plan available)
+    which is applied by\\
+    \refCom{mrcsetapikey}\brackets{\docValue{thunderforest}}\marg{api-key}.
+    \begin{itemize}
+    \item Usage: \url{https://www.thunderforest.com/terms}
+    \item API documentation: \url{https://www.thunderforest.com/maps/transport}
+    \end{itemize}
+    \mapexample{thunderforest transport}{thunderforest_transport}
+
+  \item\docValue{thunderforest landscape}:\\
+    Tile server of \href{https://www.thunderforest.com}{Thunderforest}.\\
+    A registered \meta{api-key} is needed (free plan available)
+    which is applied by\\
+    \refCom{mrcsetapikey}\brackets{\docValue{thunderforest}}\marg{api-key}.
+    \begin{itemize}
+    \item Usage: \url{https://www.thunderforest.com/terms}
+    \item API documentation: \url{https://www.thunderforest.com/maps/landscape}
+    \end{itemize}
+    \mapexample{thunderforest landscape}{thunderforest_landscape}
+
+\clearpage
+  \item\docValue{thunderforest outdoors}:\\
+    Tile server of \href{https://www.thunderforest.com}{Thunderforest}.\\
+    A registered \meta{api-key} is needed (free plan available)
+    which is applied by\\
+    \refCom{mrcsetapikey}\brackets{\docValue{thunderforest}}\marg{api-key}.
+    \begin{itemize}
+    \item Usage: \url{https://www.thunderforest.com/terms}
+    \item API documentation: \url{https://www.thunderforest.com/maps/outdoors}
+    \end{itemize}
+    \mapexample{thunderforest outdoors}{thunderforest_outdoors}
+
+  \item\docValue{thunderforest transport-dark}:\\
+    Tile server of \href{https://www.thunderforest.com}{Thunderforest}.\\
+    A registered \meta{api-key} is needed (free plan available)
+    which is applied by\\
+    \refCom{mrcsetapikey}\brackets{\docValue{thunderforest}}\marg{api-key}.
+    \begin{itemize}
+    \item Usage: \url{https://www.thunderforest.com/terms}
+    \item API documentation: \url{https://www.thunderforest.com/maps/transport-dark}
+    \end{itemize}
+    \mapexample{thunderforest transport-dark}{thunderforest_transport-dark}
+
+  \item\docValue{thunderforest spinal-map}:\\
+    Tile server of \href{https://www.thunderforest.com}{Thunderforest}.\\
+    A registered \meta{api-key} is needed (free plan available)
+    which is applied by\\
+    \refCom{mrcsetapikey}\brackets{\docValue{thunderforest}}\marg{api-key}.
+    \begin{itemize}
+    \item Usage: \url{https://www.thunderforest.com/terms}
+    \item API documentation: \url{https://www.thunderforest.com/maps/spinal-map}
+    \end{itemize}
+    \mapexample{thunderforest spinal-map}{thunderforest_spinal-map}
+
+\clearpage
+  \item\docValue{thunderforest pioneer}:\\
+    Tile server of \href{https://www.thunderforest.com}{Thunderforest}.\\
+    A registered \meta{api-key} is needed (free plan available)
+    which is applied by\\
+    \refCom{mrcsetapikey}\brackets{\docValue{thunderforest}}\marg{api-key}.
+    \begin{itemize}
+    \item Usage: \url{https://www.thunderforest.com/terms}
+    \item API documentation: \url{https://www.thunderforest.com/maps/pioneer}
+    \end{itemize}
+    \mapexample{thunderforest pioneer}{thunderforest_pioneer}
+
+  \item\docValue{thunderforest mobile-atlas}:\\
+    Tile server of \href{https://www.thunderforest.com}{Thunderforest}.\\
+    A registered \meta{api-key} is needed (free plan available)
+    which is applied by\\
+    \refCom{mrcsetapikey}\brackets{\docValue{thunderforest}}\marg{api-key}.
+    \begin{itemize}
+    \item Usage: \url{https://www.thunderforest.com/terms}
+    \item API documentation: \url{https://www.thunderforest.com/maps/mobile-atlas}
+    \end{itemize}
+    \mapexample{thunderforest mobile-atlas}{thunderforest_mobile-atlas}
+
+  \item\docValue{thunderforest neighbourhood}:\\
+    Tile server of \href{https://www.thunderforest.com}{Thunderforest}.\\
+    A registered \meta{api-key} is needed (free plan available)
+    which is applied by\\
+    \refCom{mrcsetapikey}\brackets{\docValue{thunderforest}}\marg{api-key}.
+    \begin{itemize}
+    \item Usage: \url{https://www.thunderforest.com/terms}
+    \item API documentation: \url{https://www.thunderforest.com/maps/neighbourhood}
+    \end{itemize}
+    \mapexample{thunderforest neighbourhood}{thunderforest_neighbourhood}
+
+\clearpage
+  \item\docValue{topplusopen web}:\\
+    Tile server (TMS) of \href{http://www.bkg.bund.de}{Bundesamt f\"{u}r Kartographie und Geod\"{a}sie}.
+    \begin{itemize}
+    \item Covers world / Europe / Germany depending on zoom level
+    \item Usage (German language): \url{https://gdz.bkg.bund.de/index.php/default/webdienste/topplus-produkte/wmts-topplusopen-wmts-topplus-open.html}
+    \end{itemize}
+    \mapexample{topplusopen web}{topplusopen_web}
+
+  \item\docValue{topplusopen web grau}:\\
+    Tile server (TMS) of \href{http://www.bkg.bund.de}{Bundesamt f\"{u}r Kartographie und Geod\"{a}sie}.
+    \begin{itemize}
+    \item Covers world / Europe / Germany depending on zoom level
+    \item Usage (German language): \url{https://gdz.bkg.bund.de/index.php/default/webdienste/topplus-produkte/wmts-topplusopen-wmts-topplus-open.html}
+    \end{itemize}
+    \mapexample{topplusopen web grau}{topplusopen_web_grau}
+
+\end{itemize}
+
+\clearpage
+\begin{tcolorbox}[spartan,colback=white]
+The following sources are Web map server (WMS). Therefore,
+\refKey{/mermap/supply/target} can only be set to \docValue{wmsmap}
+or \docValue{none}.
+\end{tcolorbox}
+
+\begingroup
+\ExplSyntaxOn
+\int_gzero:N \g_tmpa_int
+\NewDocumentCommand \cleanstep {}
+{
+  \fp_compare:nNnT { \g_tmpa_int-trunc(\g_tmpa_int/3)*3 } = 0
+    {
+      \int_compare:nNnT \g_tmpa_int > 0
+        {
+          \clearpage
+        }
+    }
+  \int_gincr:N \g_tmpa_int
+}
+\ExplSyntaxOff
+
+  \begin{itemize}
+
+\foreach \name / \scdenom / \xtra in {p5/5000,p10/10000,p17.5/17500,p25/25000,p50/50000,p100/100000,p250/250000}
+{
+\cleanstep
+  \item\docValue{topplusopen \name}:\\
+    Web map server (WMS) of \href{http://www.bkg.bund.de}{Bundesamt f\"{u}r Kartographie und Geod\"{a}sie}.
+    \begin{itemize}
+    \item 1:\scdenom, covers Europe / Germany depending on zoom level
+    \item Usage (German language): \url{https://gdz.bkg.bund.de/index.php/default/webdienste/topplus-produkte/wmts-topplusopen-wmts-topplus-open.html}
+    \end{itemize}
+    \mapexample[target=wmsmap]{topplusopen \name}{topplusopen_\name}
+
+\cleanstep
+  \item\docValue{topplusopen \name\ grau}:\\
+    Web map server (WMS) of \href{http://www.bkg.bund.de}{Bundesamt f\"{u}r Kartographie und Geod\"{a}sie}.
+    \begin{itemize}
+    \item 1:\scdenom, covers Europe / Germany depending on zoom level
+    \item Usage (German language): \url{https://gdz.bkg.bund.de/index.php/default/webdienste/topplus-produkte/wmts-topplusopen-wmts-topplus-open.html}
+    \end{itemize}
+    \def\grau{ grau}%
+    \mapexample[target=wmsmap]{topplusopen \name\grau}{topplusopen_\name_grau}
+}
+
+  \end{itemize}
+\endgroup
+
+\end{docMrcKey}
+
+
+
+\begin{docCommand}{mrcnewsupplysource}{\marg{source}\marg{options}}
+  Adds a new \meta{source} value to \refKey{/mermap/supply/source}.
+  The \meta{options} should set the keys
+  \refKey{/mermap/supply/url}, \refKey{/mermap/supply/attribution},\\
+  \refKey{/mermap/supply/attribution print} and \refKey{/mermap/supply/basename}.
+  It is recommend to use |x ...| for \meta{source} to avoid conflicts
+  with future official additions to \refKey{/mermap/supply/source}.
+  \begin{dispListing}
+  \mrcnewsupplysource{x example}
+  {
+    url               = http://127.0.0.1/dummy/{z}/{x}/{y}.png,
+    attribution       = {Dummy tile server},
+    attribution print = {Dummy tile server},
+    basename          = tiles/dummy,
+  }
+  \end{dispListing}
+\end{docCommand}
+
+
diff --git a/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.marker.tex b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.marker.tex
new file mode 100644
index 00000000000..070b12acdac
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.marker.tex
@@ -0,0 +1,552 @@
+% !TeX root = mercatormap.tex
+% !TeX encoding=UTF-8
+% !TeX spellcheck=en_US
+% include file of mercatormap.tex (manual of the LaTeX package mercatormap)
+\clearpage
+\section{Markers}%
+As described before, a map can be amended by arbitrary \tikzname\ code
+using map coordinates.
+For highlighting places or adding markers, the \refCom{mrcmarker} macro
+may be helpful which provides some predefined marker types.
+
+%-------------------------------------------------------------------------------
+\subsection{Marker Settings}
+
+\begin{docCommand}{mrcmarker}{\marg{options}}
+  Places a marker according to the given \meta{options} on the map.
+  All \meta{options} share the common prefix |/mermap/marker/|.
+  Different \refKey{/mermap/marker/type} settings are available which are
+  more or less customizable.
+
+\tikzsetnextfilename{marker_mrcmarker}%
+\begin{dispExample}
+% \mrcsetapikey{thunderforest}{YOUR-API-KEY} % registered key
+\begin{tikzpicture}
+  \mrcmap[type=reference, position=48.15:11.6,
+    flex reference scale=500 000,
+    source=thunderforest neighbourhood,
+    tex width=\linewidth,tex height=4cm]{}
+  \mrcdrawmap
+  \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+    {\mrcmapattribution};
+  \mrcdrawnetwork
+  \mrcclipmap
+  \mermapsetmarker{draw=red, fill=red!20!white, font=\sffamily\footnotesize}
+  \mrcmarker{type=classic, position=48.15:11.2, contents={A}, radius=0.5mm}
+  \mrcmarker{type=pin,     position=48.15:11.3, contents={B}}
+  \mrcmarker{type=pinflip, position=48.15:11.4, contents={C}}
+  \mrcmarker{type=drop,    position=48.15:11.5, contents={D}}
+  \mrcmarker{type=knob,    position=48.15:11.6, contents={E}}
+  \mrcmarker{type=pictodropring, position=48.15:11.7, contents={F}}
+  \mrcmarker{type=pictoknobring, position=48.15:11.8, contents={G}}
+  \mrcmarker{type=ringx,   position=48.15:11.9, contents={H}}
+  \mrcmarker{type=markx,   position=48.15:12,   contents={I}}
+\end{tikzpicture}
+\end{dispExample}
+\end{docCommand}
+
+
+\begin{docCommand}{mermapsetmarker}{\marg{options}}
+  Sets \meta{options} for all following markers inside the current \TeX\ group.
+  All options share the common prefix |/mermap/marker/|, e.g. for setting
+  \refKey{/mermap/marker/type} use
+  \begin{dispListing}
+    \mermapsetmarker{type=pin}
+  \end{dispListing}
+  Also see \refCom{mermapset} and \refCom{mermapsetsupply}.
+\end{docCommand}
+
+\pagebreak
+
+\begin{docMrcKey}{marker/first options}{=\meta{options}}{no default, initially unset}
+  The given list of \meta{options} is used inside every \refCom{mrcmarker}
+  \emph{before} the options of \refCom{mrcmarker}.
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/last options}{=\meta{options}}{no default, initially unset}
+  The given list of \meta{options} is used inside every \refCom{mrcmarker}
+  \emph{after} the options of \refCom{mrcmarker}.
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/latitude}{=\meta{latitude}}{no default, initially |12|}
+  Latitude degree of the place marker.
+  It is accessible as \docAuxCommand{mrcmarkerlatitude} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/lat}{=\meta{latitude}}{no default, initially |12|}
+  Alias for \refKey{/mermap/marker/latitude}.
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/longitude}{=\meta{longitude}}{no default, initially |49|}
+  Longitude degree of the place marker.
+  It is accessible as \docAuxCommand{mrcmarkerlongitude} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/lon}{=\meta{longitude}}{no default, initially |49|}
+  Alias for \refKey{/mermap/marker/longitude}.
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/position}{=\meta{place latitude}:\meta{place longitude}}{no default, initially |12:49|}
+  Sets the latitude degree and the longitude degree of the place marker.
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/named position}{=\meta{name}}{style, no default}
+  Sets the latitude degree and the longitude degree of the place marker
+  to the \emph{named position} denoted by \meta{name}, see \Fullref{sec:names_positions}.
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/use inside}{=\meta{area}}{no default, initially |map|}
+  The place marker is used or ignored according to its belonging inside the
+  given \meta{area}. Feasible values for \meta{area} are:
+  \begin{itemize}
+  \item\docValue{map}: Use inside map.
+  \item\docValue{vicinity}: Use inside map plus vicinity, see \refKey{/mermap/vicinity}.
+  \end{itemize}
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{marker/contents}{=\meta{text}}{no default, initially empty}
+  Sets \meta{text} for displaying inside the marker, if
+  the marker type supports such a thing.
+  It is accessible as \docAuxCommand{mrcmarkercontents} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/pictocontents}{=\meta{code}}{no default, initially empty}
+  Sets \tikzname\ \meta{code} for displaying inside the marker, if
+  the marker type supports such a thing.
+  It is accessible as \docAuxCommand{mrcmarkerpictocontents} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/alias}{=\meta{text}}{no default, initially |noname|}
+  The position of the marker is available as \tikzname\ coordinate by
+  the given \meta{text}, e.g. to draw to or from the marker.
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/uuid}{=\meta{uuid}}{no default, initially empty}
+  Sets a \meta{uuid} for unique identification of markers.
+  It is accessible as \docAuxCommand{mrcmarkeruuid} (use read-only).
+  The \meta{uuid} is provided for user applications.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{marker/category}{=\meta{category}}{no default, initially empty}
+  Sets a \meta{category} to group markers.
+  It is accessible as \docAuxCommand{mrcmarkercategory} (use read-only).
+\end{docMrcKey}
+
+\clearpage
+
+\begin{docMrcKey}{marker/show}{\colOpt{=true\textbar false}}{default |true|, initially |true|}
+  If set to |true|, the marker is shown, if it lies inside the map (or vicinity).
+  Otherwise, the place marker is not used.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{marker/hide}{\colOpt{=true\textbar false}}{default |true|, initially |false|}
+  If set to |true|, the marker is not used.
+  \refKey{/mermap/marker/hide} is inverse to \refKey{/mermap/marker/show}.
+\end{docMrcKey}
+
+
+
+\begin{docMrcKey}{marker/show category}{=\meta{category}}{style, no default}
+  Sets \refKey{/mermap/marker/show} to |true|, if \refKey{/mermap/marker/category} equals \meta{category}.
+  Otherwise, nothing happens.
+  \refKey{/mermap/marker/category} has to be set \emph{before}.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{marker/show all but category}{=\meta{category}}{style, no default}
+  Sets \refKey{/mermap/marker/show} to |true|, if \refKey{/mermap/marker/category} does not equal \meta{category}.
+  Otherwise, nothing happens.
+  \refKey{/mermap/marker/category} has to be set \emph{before}.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{marker/hide category}{=\meta{category}}{style, no default}
+  Sets \refKey{/mermap/marker/show} to |false|, if \refKey{/mermap/marker/category} equals \meta{category}.
+  Otherwise, nothing happens.
+  \refKey{/mermap/marker/category} has to be set \emph{before}.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{marker/hide all but category}{=\meta{category}}{style, no default}
+  Sets \refKey{/mermap/marker/show} to |false|, if \refKey{/mermap/marker/category} does not equal \meta{category}.
+  Otherwise, nothing happens.
+  \refKey{/mermap/marker/category} has to be set \emph{before}.
+  \tikzsetnextfilename{marker_hide}%
+  \begin{dispExample}
+  \begin{tikzpicture}
+    \mrcmap[tex width=4cm, tex height=4cm,
+      latitude=48.14, longitude=11.57, target=none]{}
+    \mrcdrawmap[draw=path]
+    \mermapsetmarker{last options={hide all but category=A}}
+    \mrcmarker{type=knob,position=48.00:11.43,fill=blue,category=A}
+    \mrcmarker{type=knob,position=48.28:11.43,fill=red,category=B}
+    \mrcmarker{type=knob,position=48.00:11.71,fill=blue,category=A}
+    \mrcmarker{type=knob,position=48.28:11.71,fill=red,category=B}
+  \end{tikzpicture}
+  \end{dispExample}
+\end{docMrcKey}
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Marker Types}
+
+\begin{docMrcKey}{marker/type}{=\meta{type}}{no default, initially |classic|}
+  Decides about the basic shape and style of the marker.
+  Feasible values for \meta{type} are listed in the following.
+  More values can be defined by \refCom{mrcnewmarkertype}.
+  \begin{itemize}
+  %
+  \item\docValue{classic}:
+    \tikzsetnextfilename{marker_classic}%
+    \begin{dispExample}
+    \begin{tikzpicture}
+    \mrcmap[tex width=8cm, tex height=4cm, zoom=10,
+      latitude=48.14, longitude=11.48, target=none]{}
+    \mrcdrawmap[draw=path]
+    \mermapsetmarker{type=classic}
+    \mrcmarker{position=48.14:11.36, contents={Germering}}
+    \mermapsetmarker{type=classic, text=blue, font=\sffamily\footnotesize}
+    \mrcmarker{position=48.14:11.57, contents={M\"unchen}, angle=-30}
+    \end{tikzpicture}
+    \end{dispExample}
+  %
+  \item\docValue{pin}:
+    \tikzsetnextfilename{marker_pin}%
+    \begin{dispExample}
+    \begin{tikzpicture}
+    \mrcmap[tex width=8cm, tex height=4cm, zoom=10,
+      latitude=48.14, longitude=11.48, target=none]{}
+    \mrcdrawmap[draw=path]
+    \mermapsetmarker{type=pin}
+    \mrcmarker{position=48.14:11.36, contents={Germering}}
+    \mermapsetmarker{type=pin, draw=blue, fill=blue!20!white,
+      font=\sffamily\footnotesize}
+    \mrcmarker{position=48.14:11.57, contents={M\"unchen}, alias={munich}}
+    \end{tikzpicture}
+    \end{dispExample}
+  %
+  \clearpage
+  \item\docValue{pinflip}:
+    \tikzsetnextfilename{marker_pinflip}%
+    \begin{dispExample}
+    \begin{tikzpicture}
+    \mrcmap[tex width=8cm, tex height=4cm, zoom=10,
+      latitude=48.14, longitude=11.48, target=none]{}
+    \mrcdrawmap[draw=path]
+    \mermapsetmarker{type=pinflip}
+    \mrcmarker{position=48.14:11.36, contents={Germering}}
+    \mermapsetmarker{type=pinflip, draw=red, fill=red!20!white,
+      font=\sffamily\footnotesize}
+    \mrcmarker{position=48.14:11.57, contents={M\"unchen}, shift=4mm}
+    \end{tikzpicture}
+    \end{dispExample}
+  %
+  \item\docValue{drop}:
+    \tikzsetnextfilename{marker_drop}%
+    \begin{dispExample}
+    \begin{tikzpicture}
+    \mrcmap[tex width=8cm, tex height=4cm, zoom=10,
+      latitude=48.14, longitude=11.48, target=none]{}
+    \mrcdrawmap[draw=path]
+    \mermapsetmarker{type=drop}
+    \mrcmarker{position=48.14:11.36, contents={Germering}}
+    \mermapsetmarker{type=drop, fill=blue, draw=blue!20!white, text=white,
+      font=\sffamily\small\bfseries,
+      path style={line join=round, thin, draw=mrcmarkerfill,
+        double=mrcmarkerdraw,double distance=0.6pt}  }
+    \mrcmarker{position=48.14:11.57, contents={M}, alias={munich}}
+    \end{tikzpicture}
+    \end{dispExample}
+  %
+  \clearpage
+  \item\docValue{pictodrop}:
+    \tikzsetnextfilename{marker_pictodrop}%
+    \begin{dispExample}
+    \begin{tikzpicture}
+    \mrcmap[tex width=8cm, tex height=4cm, zoom=10,
+      latitude=48.14, longitude=11.48, target=none]{}
+    \mrcdrawmap[draw=path]
+    \mermapsetmarker{type=pictodrop, pictocontents={
+      \draw[fill=red!70!gray,draw=white]
+        (-0.2,-0.2)--(0.2,-0.2)--(0.2,0.1)--(0,0.2)--(-0.2,0.1) -- cycle;
+    }}
+    \mrcmarker{position=48.14:11.36, contents={Germering}}
+    \mermapsetmarker{type=pictodrop,
+      fill=blue!75!gray!30, draw=blue,
+      radius=4mm, shift=-1mm}
+    \mrcmarker{position=48.14:11.57,
+      pictocontents={
+      \node {\includegraphics[width=6mm]{alertmessage-warning.png}};
+    }}
+    \end{tikzpicture}
+    \end{dispExample}
+  %
+  \item\docValue{pictodropring}:
+    \tikzsetnextfilename{marker_pictodropring}%
+    \begin{dispExample}
+    \begin{tikzpicture}
+    \mrcmap[tex width=8cm, tex height=4cm, zoom=10,
+      latitude=48.14, longitude=11.48, target=none]{}
+    \mrcdrawmap[draw=path]
+    \mermapsetmarker{type=pictodropring}
+    \mrcmarker{position=48.14:11.36, contents={Germering}}
+    \mermapsetmarker{type=pictodropring,
+      fill=red!50!gray, draw=red!75!white,
+      shift=-1mm}
+    \mrcmarker{position=48.14:11.57}
+    \end{tikzpicture}
+    \end{dispExample}
+  %
+  \clearpage
+  \item\docValue{knob}:
+    \tikzsetnextfilename{marker_knob}%
+    \begin{dispExample}
+    \begin{tikzpicture}
+    \mrcmap[tex width=8cm, tex height=4cm, zoom=10,
+      latitude=48.14, longitude=11.48, target=none]{}
+    \mrcdrawmap[draw=path]
+    \mermapsetmarker{type=knob}
+    \mrcmarker{position=48.14:11.36, contents={Germering}}
+    \mermapsetmarker{type=knob, radius=2mm,
+      fill=blue, draw=blue!20!white,
+      text=white, path style={draw=mrcmarkerfill, double=mrcmarkerdraw,
+        double distance=0.6pt}  }
+    \mrcmarker{position=48.14:11.57, contents={M}}
+    \end{tikzpicture}
+    \end{dispExample}
+  %
+  \item\docValue{pictoknob}:
+    \tikzsetnextfilename{marker_pictoknob}%
+    \begin{dispExample}
+    \begin{tikzpicture}
+    \mrcmap[tex width=8cm, tex height=4cm, zoom=10,
+      latitude=48.14, longitude=11.48, target=none]{}
+    \mrcdrawmap[draw=path]
+    \mermapsetmarker{type=pictoknob}
+    \mrcmarker{position=48.14:11.36, contents={Germering}}
+    \mermapsetmarker{type=pictoknob, radius=2mm,
+      fill=blue, draw=blue!20!white,
+      path style={draw=mrcmarkerfill, double=mrcmarkerdraw,
+        double distance=0.6pt}  }
+    \mrcmarker{position=48.14:11.57, alias={munich}}
+    \end{tikzpicture}
+    \end{dispExample}
+  %
+  \clearpage
+  \item\docValue{pictoknobring}:
+    \tikzsetnextfilename{marker_pictoknobring}%
+    \begin{dispExample}
+    \begin{tikzpicture}
+    \mrcmap[tex width=8cm, tex height=4cm, zoom=10,
+      latitude=48.14, longitude=11.48, target=none]{}
+    \mrcdrawmap[draw=path]
+    \mermapsetmarker{type=pictoknobring}
+    \mrcmarker{position=48.14:11.36, contents={Germering}}
+    \mermapsetmarker{type=pictoknobring, radius=2mm, inner radius=1mm,
+      draw=blue, fill=blue!20!white,
+      pictocontents={\node[above] at (0,\mrcmarkerradius)
+        {\mrcmarkercontents};}
+      }
+    \mrcmarker{position=48.14:11.57, contents={M\"unchen}}
+    \end{tikzpicture}
+    \end{dispExample}
+  %
+  \item\docValue{ringx}:
+    \tikzsetnextfilename{marker_ringx}%
+    \begin{dispExample}
+    \begin{tikzpicture}
+    \mrcmap[tex width=8cm, tex height=4cm, zoom=10,
+      latitude=48.14, longitude=11.48, target=none]{}
+    \mrcdrawmap[draw=path]
+    \mermapsetmarker{type=ringx}
+    \mrcmarker{position=48.14:11.36, contents={Germering}}
+    \mermapsetmarker{type=ringx, radius=4mm, inner radius=3mm,
+      draw=red, fill=red!50!white,
+      path style={draw=mrcmarkerdraw, very thin, double=white,
+        double distance=0.6pt}
+        }
+    \mrcmarker{position=48.14:11.57, alias={munich}}
+    \end{tikzpicture}
+    \end{dispExample}
+  %
+  \clearpage
+  \item\docValue{markx}:
+    \tikzsetnextfilename{marker_markx}%
+    \begin{dispExample}
+    \begin{tikzpicture}
+    \mrcmap[tex width=8cm, tex height=4cm, zoom=10,
+      latitude=48.14, longitude=11.48, target=none]{}
+    \mrcdrawmap[draw=path]
+    \mermapsetmarker{type=markx}
+    \mrcmarker{position=48.14:11.36, contents={Germering}}
+    \mermapsetmarker{type=markx, radius=4mm, inner radius=3mm,
+      draw=red, fill=red!50!white, path style={very thin}
+        }
+    \mrcmarker{position=48.14:11.57, alias={munich}}
+    \end{tikzpicture}
+    \end{dispExample}
+  %
+  \end{itemize}
+\end{docMrcKey}
+
+\medskip
+The different marker types can be customized by some additional options:
+
+\begin{docMrcKey}{marker/font}{=\meta{font}}{no default, initially \texttt{\textbackslash sffamily\textbackslash small}}
+  Font of the marker text
+  (\docValue{classic}, \docValue{pin}, \docValue{pinflip}, \docValue{drop}, \docValue{knob}).
+  It is accessible as \docAuxCommand{mrcmarkerfont} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/text}{=\meta{color}}{no default, initially |black|}
+  Color of the marker text
+  (\docValue{classic}, \docValue{pin}, \docValue{pinflip}, \docValue{drop}, \docValue{knob}).
+  It is accessible as \docColor{mrcmarkertext} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/draw}{=\meta{color}}{no default, initially |gray|}
+  Color of the marker frame
+  (\docValue{pin}, \docValue{pinflip}, \docValue{drop}, \docValue{pictodrop},
+    \docValue{pictodropring}, \docValue{knob}, \docValue{pictoknob}, \docValue{pictoknobring},
+    \docValue{ringx}, \docValue{markx}).
+  It is accessible as \docColor{mrcmarkerdraw} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/fill}{=\meta{color}}{no default, initially |gray!20|}
+  Color of the marker interior
+  (\docValue{pin}, \docValue{pinflip}, \docValue{drop}, \docValue{pictodrop},
+    \docValue{pictodropring}, \docValue{knob}, \docValue{pictoknob}, \docValue{pictoknobring},
+    \docValue{ringx}, \docValue{markx}).
+  It is accessible as \docColor{mrcmarkerfill} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/angle}{=\meta{angle}}{no default, initially |90|}
+  Angle of the marker (\docValue{classic}).
+  It is accessible as \docAuxCommand{mrcmarkerangle} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/shift}{=\meta{length}}{no default, initially |0pt|}
+  Shift of the marker text
+  (\docValue{pin}, \docValue{pinflip}).
+  It also shifts the drop center
+  (\docValue{drop}, \docValue{pictodrop}, \docValue{pictodropring}).
+  It is accessible as \docAuxCommand{mrcmarkershift} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/radius}{=\meta{length}}{no default, initially |3mm|}
+  Radius of the marker
+  (\docValue{classic}, \docValue{drop}, \docValue{pictodrop},
+    \docValue{pictodropring}, \docValue{knob}, \docValue{pictoknob}, \docValue{pictoknobring},
+    \docValue{ringx}, \docValue{markx}).
+  It is accessible as \docAuxCommand{mrcmarkerradius} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/inner radius}{=\meta{length}}{no default, initially |2.25mm|}
+  Inner radius of the marker
+  (\docValue{pictodropring}, \docValue{pictoknobring}, \docValue{ringx}).
+  It is accessible as \docAuxCommand{mrcmarkerinnerradius} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/path style}{=\marg{options}}{no default, initially empty}
+  \tikzname\ \meta{options} which are added to (some) path elements of
+  of the marker
+  (\docValue{pin}, \docValue{pinflip}, \docValue{drop}, \docValue{pictodrop},
+    \docValue{pictodropring}, \docValue{knob}, \docValue{pictoknob}, \docValue{pictoknobring},
+    \docValue{ringx}, \docValue{markx}).
+  It is accessible as \tikzname\ option \docValue{mrcpathstyle} (use read-only).
+\end{docMrcKey}
+
+\begin{docMrcKey}{marker/node style}{=\marg{options}}{no default, initially empty}
+  \tikzname\ \meta{options} which are added to the node element of
+  of the marker
+  (\docValue{classic}, \docValue{pin}, \docValue{pinflip}, \docValue{drop}, \docValue{knob}).
+  It is accessible as \tikzname\ option \docValue{mrcnodestyle} (use read-only).
+\end{docMrcKey}
+
+
+
+%-------------------------------------------------------------------------------
+\subsection{New Marker Types}
+
+\begin{docCommand}{mrcnewmarkertype}{\marg{type name}\marg{\tikzname\ code}}
+  Creates a new \refKey{/mermap/marker/type} value \meta{type name} using the
+  given \meta{\tikzname\ code} for drawing a place marker.
+  To avoid future name clashes, you should start a private \meta{type name}
+  with letter |x|. For \meta{\tikzname\ code} settings like
+  \docAuxCommand{mrcmarkercontents},
+  \docAuxCommand{mrcmarkerfont}, or \docColor{mrcmarkerfill} may be used
+  or ignored.
+
+  \tikzsetnextfilename{marker_xmark}%
+  \begin{dispExample}
+  \mrcnewmarkertype{xmark}{
+    \path[draw=mrcmarkerdraw,thick] circle (\mrcmarkerradius);
+    \path[draw=mrcmarkerdraw,thick]
+       (45:2*\mrcmarkerradius)--(225:2*\mrcmarkerradius)
+       (135:2*\mrcmarkerradius)--(315:2*\mrcmarkerradius);
+  }
+  \begin{tikzpicture}
+  \mrcmap[tex width=4cm, tex height=4cm,
+    latitude=48.14, longitude=11.57, target=none]{}
+  \mrcdrawmap[draw=path]
+  \mrcmarker{type=xmark,
+    position=48.14:11.57,alias={munich},
+    draw=red}
+  \end{tikzpicture}
+  \end{dispExample}
+\end{docCommand}
+
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{New Marker Styles}
+
+\begin{docCommand}{mrcnewmarkerstyle}{\marg{style name}\marg{options}}
+  Creates a new \refKey{/mermap/marker/style} value \meta{style name} using the
+  given \meta{options} for drawing a place marker.
+  All \meta{options} share the common prefix |/mermap/marker/|. Here, a \emph{style}
+  has the same concept as a \tikzname\ style.
+
+  \tikzsetnextfilename{marker_markerstyle}%
+  \begin{dispExample}
+  \begin{tikzpicture}
+  \mrcmap[tex width=8cm, tex height=4cm, zoom=10,
+    latitude=48.14, longitude=11.48, target=none]{}
+  \mrcdrawmap[draw=path]
+  \mrcnewmarkerstyle{one}{type=pin, draw=blue, fill=blue!20!white,
+    font=\sffamily\footnotesize}
+  \mrcnewmarkerstyle{two}{type=pinflip, draw=red, fill=red!20!white,
+    font=\sffamily\footnotesize}
+  \mrcmarker{style=one, position=48.14:11.36, contents={Germering}}
+  \mrcmarker{style=two, position=48.14:11.57, contents={M\"unchen}}
+  \end{tikzpicture}
+  \end{dispExample}
+
+  A \emph{style} can have one parameter, but note the small difference
+  in applying this parameter compared to \tikzname:
+
+  \tikzsetnextfilename{marker_markerstyle2}%
+  \begin{dispExample}
+  \begin{tikzpicture}
+  \mrcmap[tex width=8cm, tex height=4cm, zoom=10,
+    latitude=48.14, longitude=11.48, target=none]{}
+  \mrcdrawmap[draw=path]
+  \mrcnewmarkerstyle{color}{type=pin, draw=#1, fill=#1!20!white,
+    font=\sffamily\footnotesize}
+  \mrcmarker{style/color=blue, position=48.14:11.36, contents={Germering}}
+  \mrcmarker{style/color=red, position=48.14:11.57, contents={M\"unchen}}
+  \end{tikzpicture}
+  \end{dispExample}
+\end{docCommand}
+
+
+\begin{docMrcKey}{marker/style}{=\meta{style name}}{no default, initially unset}
+  Applies a given \meta{style name}, i.e. all options which were stored
+  by \refCom{mrcnewmarkerstyle} under this name.
+\end{docMrcKey}
+
diff --git a/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.orthodromes.tex b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.orthodromes.tex
new file mode 100644
index 00000000000..17855158412
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.orthodromes.tex
@@ -0,0 +1,169 @@
+% !TeX root = mercatormap.tex
+% !TeX encoding=UTF-8
+% !TeX spellcheck=en_US
+% include file of mercatormap.tex (manual of the LaTeX package mercatormap)
+\clearpage
+\section{Orthodromes and Loxodromes}\label{sec:orthodromes}%
+
+A loxodrome is a curve which crosses all meridians with
+a constant angle. On Mercator maps, loxodromes are depicted as straight lines
+and can be drawn by simple \tikzname\ |path| elements.
+
+On a sphere, the shortest path
+from one point to another runs along an orthodrome where
+an orthodrome is a great-circle.
+
+The mathematical background and further information are found in \cite{Sturm:2020}.
+
+
+%-------------------------------------------------------------------------------
+\subsection{Orthodrome Drawing}
+
+\begin{docMrcKey}{samples}{=\meta{number}}{no default, initially |100|}
+  An orthodrome curve is approximated by a polygon trajectory with
+  \meta{number} pieces.
+\end{docMrcKey}
+
+
+\begin{docTikzKey}{mermap samples}{=\meta{number}}{style, no default}
+  \tikzname\ variant to set \refKey{/mermap/samples}.
+\end{docTikzKey}
+
+
+\begin{docCommand}{mrcdraworthodrome}{\oarg{options}\marg{lat1}\marg{lon1}\marg{lat2}\marg{lon2}}
+  Draws an orthodrome curve from a point with
+  latitude \meta{lat1} and longitude \meta{lon1}
+  to a point with
+  latitude \meta{lat2} and longitude \meta{lon2}.
+  This is a \tikzname\ path object where \meta{options} are
+  \tikzname\ settings for this path. There are two orthodrome pieces connecting
+  two positions (forming a great-circle). \refCom{mrcdraworthodrome} does
+  not necessarily choose the shorter one, see \cite{Sturm:2020}.
+  The drawn orthodrome is a spherical approximation instead of an ellipsoidal
+  one.
+  \tikzsetnextfilename{ortho_orthodrome1}%
+  \begin{dispExample}
+    \begin{tikzpicture}
+      \mrcmap[type=areafit,
+          south=40.7,north=48.2,west=-74.1,east=11.6,
+          source=topplusopen web,
+          tex width=\linewidth,tex height=6cm,
+        ]{ortho_orthodrome1}
+        \mrcdrawmap
+        \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+          {\mrcmapattribution};
+        \mrcclipmap
+      \draw (mrcmap.south west) rectangle (mrcmap.north east);
+      \mrcdraworthodrome[red,very thick,mermap samples=100]
+        {48.14}{11.58}{40.71}{-74.01}
+      \node[red,fill=white] at ([above=1.3cm]mrcmap) {
+        \mrcprettyorthodistance{48.14}{11.58}{40.71}{-74.01} };
+    \end{tikzpicture}
+  \end{dispExample}
+\end{docCommand}
+
+
+\clearpage
+\begin{docCommand}{mrcNPdraworthodrome}{\oarg{options}\marg{name1}\marg{name2}}
+  Identical to \refCom{mrcdraworthodrome}, but the start and end point are
+  described by named positions \meta{name1} and \meta{name2}.
+
+  \tikzsetnextfilename{ortho_orthodrome2}%
+  \begin{dispExample}
+    \begin{tikzpicture}
+      \mrcNPdef{munich}{48.14}{11.58}
+      \mrcNPdef{newyork}{40.71}{-74.01}
+      \mrcmap[type=areafit, area={munich,newyork},
+          source=topplusopen web,
+          tex width=\linewidth,tex height=6cm,
+          ]{ortho_orthodrome2}
+        \mrcdrawmap
+        \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+          {\mrcmapattribution};
+        \mrcclipmap
+      \draw (mrcmap.south west) rectangle (mrcmap.north east);
+      \mrcmarker{type=pin,named position=munich,contents={M\"unchen}}
+      \mrcmarker{type=pinflip,shift=5mm,named position=newyork,
+        contents={New York City}}
+      \mrcNPdraworthodrome[red,very thick] {munich}{newyork}
+      \draw[blue,very thick] (\mrcNPcs{munich}) -- (\mrcNPcs{newyork});
+      \node[red,fill=white] at ([above=1.3cm]mrcmap) {
+        \mrcNPprettyorthodistance{munich}{newyork} };
+      \node[blue,fill=white] at ([below=5mm]mrcmap) {
+        \mrcNPprettyloxodistance{munich}{newyork} };
+    \end{tikzpicture}
+  \end{dispExample}
+\end{docCommand}
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Orthodromic and Loxodromic Distances}
+
+\begin{docCommand}{mrcprettyorthodistance}{\marg{lat1}\marg{lon1}\marg{lat2}\marg{lon2}}
+  Approximate orthodromic distance between two points
+  with latitude \meta{lat1}, longitude \meta{lon1}
+  and latitude \meta{lat2}, longitude \meta{lon2}
+  with three valid digits.
+  \begin{dispExample}
+  \mrcprettyorthodistance{48.14}{11.58}{40.71}{-74.01}
+  \end{dispExample}
+\end{docCommand}
+
+
+\begin{docCommand}{mrcNPprettyorthodistance}{\marg{name1}\marg{name2}}
+  Approximate orthodromic distance between two named positions
+  \meta{name1} and \meta{name2} with three valid digits.
+  \begin{dispExample}
+  \mrcNPdef{munich}{48.14}{11.58}
+  \mrcNPdef{newyork}{40.71}{-74.01}
+  \mrcNPprettyorthodistance{munich}{newyork}
+  \end{dispExample}
+\end{docCommand}
+
+
+\begin{docCommand}{mrcstoreorthodistance}{\marg{macro}\marg{lat1}\marg{lon1}\marg{lat2}\marg{lon2}}
+  Stores the approximate orthodromic distance (in kilometers) between two points
+  with latitude \meta{lat1}, longitude \meta{lon1}
+  and latitude \meta{lat2}, longitude \meta{lon2}
+  to a given \meta{macro}.
+  \begin{dispExample}
+  \mrcstoreorthodistance\mydist{48.14}{11.58}{40.71}{-74.01}
+  \mydist
+  \end{dispExample}
+\end{docCommand}
+
+
+\begin{docCommand}{mrcprettyloxodistance}{\marg{lat1}\marg{lon1}\marg{lat2}\marg{lon2}}
+  Approximate loxodromic distance between two points
+  with latitude \meta{lat1}, longitude \meta{lon1}
+  and latitude \meta{lat2}, longitude \meta{lon2}
+  with three valid digits.
+  \begin{dispExample}
+  \mrcprettyloxodistance{48.14}{11.58}{40.71}{-74.01}
+  \end{dispExample}
+\end{docCommand}
+
+
+\begin{docCommand}{mrcNPprettyloxodistance}{\marg{name1}\marg{name2}}
+  Approximate loxodromic distance between two named positions
+  \meta{name1} and \meta{name2} with three valid digits.
+  \begin{dispExample}
+  \mrcNPdef{munich}{48.14}{11.58}
+  \mrcNPdef{newyork}{40.71}{-74.01}
+  \mrcNPprettyloxodistance{munich}{newyork}
+  \end{dispExample}
+\end{docCommand}
+
+
+\begin{docCommand}{mrcstoreloxodistance}{\marg{macro}\marg{lat1}\marg{lon1}\marg{lat2}\marg{lon2}}
+  Stores the approximate loxodromic distance (in kilometers) between two points
+  with latitude \meta{lat1}, longitude \meta{lon1}
+  and latitude \meta{lat2}, longitude \meta{lon2}
+  to a given \meta{macro}.
+  \begin{dispExample}
+  \mrcstoreloxodistance\mydist{48.14}{11.58}{40.71}{-74.01}
+  \mydist
+  \end{dispExample}
+\end{docCommand}
+
diff --git a/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.routes.tex b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.routes.tex
new file mode 100644
index 00000000000..f7a26cf0628
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.routes.tex
@@ -0,0 +1,130 @@
+% !TeX root = mercatormap.tex
+% !TeX encoding=UTF-8
+% !TeX spellcheck=en_US
+% include file of mercatormap.tex (manual of the LaTeX package mercatormap)
+\clearpage
+\section{Routes}\label{sec:routes}%
+
+Routes are \tikzname\ |path| objects which can be drawn with the appropriate
+\tikzname\ macros and the coordinate system documented in
+\Fullref{sec:map_definition}.
+Nevertheless, in the following some alternatives are described which allow
+to specify a path by a sequence of points (\refCom{mrcpoint}).
+The idea is that such a sequence of points is exported by a third-party
+application for inclusion in a \LaTeX\ map, see \Fullref{sec:routes_gpx}.
+
+
+%-------------------------------------------------------------------------------
+\subsection{Route Path Definition}
+
+\begin{docEnvironment}{mrcroute}{\oarg{options}}
+  This environment creates a \tikzname\ |path| with given \tikzname\ \meta{options}.
+  The \meta{environment content} is a sequence of points made by \refCom{mrcpoint}.
+  \begin{dispListing}
+  \begin{mrcroute}[red, very thick]
+     \mrcpoint{48.137222}{11.575556}
+     \mrcpoint{49.019479}{12.0976942}
+     ...
+  \end{mrcroute}
+  \end{dispListing}
+  Note that a map definition by \refCom{mrcdefinemap}, \refCom{mrcmap},
+  or \refCom{mrcapplymap} is needed before a route |path| can be drawn.\par
+  %A |path| can be closed by adding \docAuxCommand{pgfpathclose} as last entry
+  %after all \refCom{mrcpoint} macros. Further |pgf| commands may be added,
+  %but the sequence should start with a \refCom{mrcpoint}.
+\end{docEnvironment}
+
+
+\begin{docEnvironment}{mrcroute*}{\oarg{options}}
+  Identical to \refEnv{mrcroute}, but the created \tikzname\ |path| is
+  closed.
+\end{docEnvironment}
+
+
+\begin{docCommand}{mrcrouteinput}{\oarg{options}\marg{filename}}
+  Identical to \refEnv{mrcroute}, but the sequence of points is included
+  from a file with the given \meta{filename}.
+\end{docCommand}
+
+\begin{docCommand}{mrcrouteinput*}{\oarg{options}\marg{filename}}
+  Identical to \refCom{mrcrouteinput}, but the created \tikzname\ |path| is
+  closed.
+\end{docCommand}
+
+
+\begin{docCommand}{mrcpoint}{\marg{latitude}\marg{longitude}}
+  Specifies a single coordinate point with given \meta{latitude} and
+  \meta{longitude} as part of sequence inside \refEnv{mrcroute}.\par
+  This is a wrapper for |\pgfpathmoveto| respectively |\pgfpathlineto|.
+\end{docCommand}
+
+
+\begin{docMrcKey}{every route}{=\meta{options}}{no default, initially empty}
+  Sets \tikzname\ \meta{options} which are applied to every
+  \refEnv{mrcroute} and \refCom{mrcrouteinput}.
+\end{docMrcKey}
+
+
+\tikzsetnextfilename{routes_example}%
+\begin{dispExample*}{center lower}
+% \mrcsetapikey{thunderforest}{YOUR-API-KEY}  % registered key
+\begin{tikzpicture}
+  \mrcmap[type=areafit,
+    west=5,east=15,south=47,north=55,
+    source=thunderforest neighbourhood,
+    tex width=14cm, tex height=14cm,
+    flex area fit=5mm
+    ]{routes_example}
+  \mrcdrawmap
+  \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+    {\mrcmapattribution};
+  \mrcclipmap
+  \path[draw] (mrcmap.south west) rectangle (mrcmap.north east);
+  \begin{mrcroute}[blue,line width=0.4mm,line cap=round,
+        line join=round,double=blue!5!white,double distance=0.4mm]
+     \mrcpoint{48.137222}{11.575556}
+     \mrcpoint{49.019479}{12.0976942}
+     \mrcpoint{49.45522}{11.07631}
+     \mrcpoint{50.978056}{11.029167}
+     \mrcpoint{52.518611}{13.408333}
+  \end{mrcroute}
+\end{tikzpicture}
+\end{dispExample*}
+
+
+\clearpage
+%-------------------------------------------------------------------------------
+\subsection{Example Python Conversion Scripts for gpx}\label{sec:routes_gpx}
+The following scripts are examples for conversions from a standard
+routes and tracks of |gpx| files to \LaTeX\ include files
+(assuming a single route/track per file).
+
+\begin{dispListing*}{title=Python 3 script to convert \texttt{route.gpx} to
+  a sequence of points file \texttt{route.inc},
+  documentation minted language=python}
+import xmltodict
+
+with open('route.gpx', encoding='utf-8') as gpx:
+    doc = xmltodict.parse(gpx.read())
+    with open('route.inc', "w", encoding="utf-8") as inc:
+        for rtept in doc['gpx']['rte']['rtept']:
+            lat = rtept['@lat']
+            lon = rtept['@lon']
+            inc.write(f'\\mrcpoint{{{lat}}}{{{lon}}}\n')
+\end{dispListing*}
+
+
+\begin{dispListing*}{title=Python 3 script to convert \texttt{track.gpx} to
+  a sequence of points file \texttt{track.inc},
+  documentation minted language=python}
+import xmltodict
+
+with open('track.gpx', encoding='utf-8') as gpx:
+    doc = xmltodict.parse(gpx.read())
+    with open('track.inc', "w", encoding="utf-8") as inc:
+        for trkpt in doc['gpx']['trk']['trkseg']['trkpt']:
+            lat = trkpt['@lat']
+            lon = trkpt['@lon']
+            inc.write(f'\\mrcpoint{{{lat}}}{{{lon}}}\n')
+\end{dispListing*}
+
diff --git a/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.scales.tex b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.scales.tex
new file mode 100644
index 00000000000..4c139d14490
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.scales.tex
@@ -0,0 +1,401 @@
+% !TeX root = mercatormap.tex
+% !TeX encoding=UTF-8
+% !TeX spellcheck=en_US
+% include file of mercatormap.tex (manual of the LaTeX package mercatormap)
+\clearpage
+\section{Scales and Sizes}%
+
+Inside a defined map several size values and scaling options are
+available. Please note that due to the nature of the Mercator projection and several
+simplifying assumptions all specifications for map scale, map width, map height,
+etc. are imprecise in the best case and even misleading in the worst case.
+They are suited for representative diagrams,
+but not for critical navigation purposes etc.
+
+\subsection{Map Sizes and Document Sizes}
+
+\begin{docCommand}{mrctexwidth}{}
+  \TeX\ length denoting the document width of the current map.
+\end{docCommand}
+
+\begin{docCommand}{mrctexheight}{}
+  \TeX\ length denoting the document width of the current map.
+\end{docCommand}
+
+\begin{docCommand}{mrcscale}{}
+  Scaling factor between map and real world.
+  A \TeX\ length given in |pt|, but stripped from that unit,
+  multiplied by \refCom{mrcscale} corresponds to a real world length
+  given in kilometers.
+  Note that this is \emph{not} the map scale.
+  Actually, it is reciprocal proportional to the map scale
+  and proportional to the map scale denominator, see \refCom{mrcmapscaledenominator}.
+\end{docCommand}
+
+\begin{docCommand}{mrctextokm}{\marg{length}}
+  Computes a given \TeX\ \meta{length} (with unit) into the corresponding
+  real world length in kilometers (without unit).
+  \begin{dispListing}
+  Map width: \mrctextokm{\mrctexwidth}\,km
+  \end{dispListing}
+\end{docCommand}
+
+\begin{docCommand}{mrctextomile}{\marg{length}}
+  Computes a given \TeX\ \meta{length} (with unit) into the corresponding
+  real world length in miles (without unit).
+  \begin{dispListing}
+  Map width: \mrctextomile{\mrctexwidth}\,mi
+  \end{dispListing}
+\end{docCommand}
+
+\begin{docCommand}{mrckmtotex}{\marg{number}}
+  Computes real world length \meta{number} in kilometers (without unit)
+  to a \TeX\ length (with unit).
+  \begin{dispListing}
+  % draw a circle with radius 20km
+  \draw (mrcpos) circle (\mrckmtotex{20});
+  \end{dispListing}
+\end{docCommand}
+
+\begin{docCommand}{mrcmiletotex}{\marg{number}}
+  Computes real world length \meta{number} in miles (without unit)
+  to a \TeX\ length (with unit).
+  \begin{dispListing}
+  % draw a circle with radius 20 miles
+  \draw (mrcpos) circle (\mrcmiletotex{20});
+  \end{dispListing}
+\end{docCommand}
+
+\begin{docCommand}{mrcmapscaledenominator}{}
+  Approximate map scale denominator.
+  \SI{1}{cm} on the map corresponds approximately to
+  \mbox{\refCom{mrcmapscaledenominator}$\cdot$\SI{1}{cm}} in the real world.
+  Do not confuse with \refCom{mrcscale}.
+  \begin{dispListing}
+  Map scale: 1:\mrcmapscaledenominator
+  \end{dispListing}
+\end{docCommand}
+
+
+\subsection{Pretty Size Output}
+
+
+\begin{docCommand}{mrcprettymapscale}{}
+  Approximate map scale given with three valid digits
+  with a representation like |1:1000|.
+  \begin{dispListing}
+  Map scale: \mrcprettymapscale
+  \end{dispListing}
+\end{docCommand}
+
+\begin{docCommand}{mrcprettymapwidth}{}
+  Approximate map width in kilometers (or meters) with three valid digits:
+  \begin{dispListing}
+  Map width: \mrcprettymapwidth
+  \end{dispListing}
+  To create a pretty printing to your own liking, you can do like the
+  following:
+  \begin{dispListing}
+  \newcommand{\myprettymapwidth}{\SI[round-mode=figures,round-precision=3]%
+    {\mrctextokm{\mrctexwidth}}{km}}
+  \end{dispListing}
+\end{docCommand}
+
+\begin{docCommand}{mrcprettymapheight}{}
+  Approximate map height in kilometers (or meters) with three valid digits:
+  \begin{dispListing}
+  Map height: \mrcprettymapheight
+  \end{dispListing}
+\end{docCommand}
+
+
+\begin{docCommand}{mrcprettymapresolution}{}
+  Approximate map resolution in dpi (dots per inch):
+  \begin{dispListing}
+  Map resolution: \mrcprettymapresolution
+  \end{dispListing}
+\end{docCommand}
+
+\begin{docCommand}{mrcprettytilesize}{}
+  Approximate tile size inside the document (\TeX\ size) in millimeters:
+  \begin{dispListing}
+  \TeX\ tile size: \mrcprettytilesize
+  \end{dispListing}
+\end{docCommand}
+
+
+\tikzsetnextfilename{scales_example}%
+\begin{dispExample}
+\begin{tikzpicture}
+  \mrcNPdef{rome}{41.89300}{12.48557}
+  \mermapset{named flex scale=2000000:rome}
+  \mrcmap[type=reference, named position=rome, source=topplusopen web,
+    tex width=\linewidth, tex height=10cm]{scales_example}
+  \mrcdrawmap
+  \node[below,font=\fontsize{7pt}{7pt}\sffamily] at (mrcmap.south)
+        {\mrcmapattribution};
+  \mrcclipmap
+  \path[draw] (\mrcNPcs{rome}) circle (\mrckmtotex{50});
+  \node[above] at ([yshift=\mrckmtotex{50}]\mrcNPcs{rome}) {\SI{50}{km}};
+  \node[above right,fill=white,fill opacity=0.5,text opacity=1,align=center,
+    line width=0pt, inner sep=2mm]
+    at (mrcmap.south west) { \begin{tabular}{rl}
+      scale:           & \mrcprettymapscale\\
+      map width:       & \mrcprettymapwidth\\
+      map height:      & \mrcprettymapheight\\
+      \TeX\ tile size: & \mrcprettytilesize\\
+      resolution:      & \mrcprettymapresolution
+      \end{tabular}\\
+      \begin{tikzpicture}
+      \mrcdrawscalebar[width-in-km=100]
+      \path[every node/.style={above,inner sep=0.5mm,font=\sffamily\tiny}]
+        (mrcscalebar.north west) -- (mrcscalebar.north east)
+        node[pos=0]{0} node[pos=0.2]{20} node[pos=0.4]{40} node[pos=0.6]{60}
+        node[pos=0.8]{80} node[pos=1]{100} node[pos=1,right,yshift=-1mm]{km};
+      \end{tikzpicture}
+    };
+\end{tikzpicture}
+\end{dispExample}
+
+
+\clearpage
+\subsection{Scale Bars}
+
+
+\begin{docCommand}{mrcdrawscalebar}{\oarg{options}}
+  Draws a scale bar according to the given \meta{options}.
+  All \meta{options} share the common prefix |/mermap/scalebar/|.
+  The most essential option is the \emph{width} of the scale bar.
+
+  \tikzsetnextfilename{scales_scalebar1}
+  \begin{dispExample}
+  \begin{tikzpicture}
+    \mrcNPdef{munich}{48.137222}{11.575556}
+    \mrcNPdef{vienna}{48.208333}{16.373056}
+    \mrcmap[tex width=\linewidth, tex height=4cm, target=none,
+      type=areafit, area={munich,vienna}, flex area fit=2cm]{}
+    \mrcdrawmap
+    \mrcmarker{named position=munich, contents={M\"unchen}}
+    \mrcmarker{named position=vienna, contents={Wien}}
+    \mrcdrawscalebar[width-in-km=100, solid,
+      at={([xshift=-10mm,yshift=5mm]mrcmap.south east)},
+      placement={above left},  ]
+  \end{tikzpicture}
+  \end{dispExample}
+
+  The size, position, and appearance of the scale bar can be customized by
+  setting the various \meta{options}. The shape of the scale bar
+  is denoted by a \tikzname\ node \docNode{mrcscalebar} which can be used
+  for lettering.
+
+  \enlargethispage*{1cm}
+  \tikzsetnextfilename{scales_scalebar2}
+  \begin{dispExample}
+  \begin{tikzpicture}
+    \mrcNPdef{munich}{48.137222}{11.575556}
+    \mrcNPdef{vienna}{48.208333}{16.373056}
+    \mrcmap[tex width=\linewidth, tex height=4cm, target=none,
+      type=areafit, area={munich,vienna}, flex area fit=2cm]{}
+    \mrcdrawmap
+    \mrcmarker{named position=munich, contents={M\"unchen}}
+    \mrcmarker{named position=vienna, contents={Wien}}
+    \mrcdrawscalebar[width-in-km=100,solid,south-west-inside=10mm;3mm ]
+    \path[every node/.style={above,inner sep=0.5mm,font=\sffamily\tiny}]
+      (mrcscalebar.north west) -- (mrcscalebar.north east)
+      node[pos=0]{0} node[pos=0.2]{20} node[pos=0.4]{40} node[pos=0.6]{60}
+      node[pos=0.8]{80} node[pos=1]{100} node[pos=1,right,yshift=-1mm]{km};
+  \end{tikzpicture}
+  \end{dispExample}
+
+\end{docCommand}
+
+
+\begin{docMrcKey}{scalebar/width-in-km}{=\meta{number}}{no default, initially |0|}
+  Sets the width of the scale bar to match the real word length \meta{number}
+  in kilometers.
+\end{docMrcKey}
+
+\begin{docMrcKey}{scalebar/width-in-kilometer}{=\meta{number}}{no default, initially |0|}
+  Alias for \refKey{/mermap/scalebar/width-in-km}
+\end{docMrcKey}
+
+\begin{docMrcKey}{scalebar/width-in-meter}{=\meta{number}}{no default, initially |0|}
+  Sets the width of the scale bar to match the real word length \meta{number}
+  in meters.
+\end{docMrcKey}
+
+\begin{docMrcKey}{scalebar/width-in-mile}{=\meta{number}}{no default, initially |0|}
+  Sets the width of the scale bar to match the real word length \meta{number}
+  in miles.
+\end{docMrcKey}
+
+\begin{docMrcKey}{scalebar/width-in-yard}{=\meta{number}}{no default, initially |0|}
+  Sets the width of the scale bar to match the real word length \meta{number}
+  in yards.
+\end{docMrcKey}
+
+\begin{docMrcKey}{scalebar/partitions}{=\meta{number}}{no default, initially |5|}
+  Determines the \meta{number} of partitions for the scale bar. If \meta{number}
+  is set to 1, there is no partitioning.
+\end{docMrcKey}
+
+\begin{docMrcKey}{scalebar/height}{=\meta{length}}{no default, initially |2mm|}
+  Sets the height of the scale bar to the given \TeX\ \meta{length}.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{scalebar/at}{=\marg{\tikzname\ coordinate}}{no default,
+    initially \texttt{\brackets{(0,0)}}}
+  The scale bar is positioned at the given \meta{\tikzname\ coordinate}.
+  The placement is done with the \refKey{/mermap/scalebar/placement} option.
+  Both option correspond to the \tikzname\ options for positioning nodes.
+  The scale bar can be positioned outside the map (e.g. below), but
+  remember to use \refCom{mrcclipmap} \emph{after} the scale bar
+  in this case, if needed.
+
+%  \begin{dispListing}
+%  \mrcdrawscalebar[
+%     at        = {([xshift=-10mm,yshift=5mm]mrcmap.south east)},
+%     placement = above left,
+%    ]
+%  \end{dispListing}
+
+  \tikzsetnextfilename{scales_scalebar3}
+  \begin{dispExample}
+  \begin{tikzpicture}
+    \mrcNPdef{munich}{48.137222}{11.575556}
+    \mrcNPdef{vienna}{48.208333}{16.373056}
+    \mrcmap[tex width=\linewidth, tex height=4cm, target=none,
+      type=areafit, area={munich,vienna}, flex area fit=2cm]{}
+    \mrcdrawmap
+    \mrcmarker{named position=munich, contents={M\"unchen}}
+    \mrcmarker{named position=vienna, contents={Wien}}
+    \mrcdrawscalebar[width-in-km=200, partitions=8,
+      at={([xshift=5mm,yshift=-2mm]mrcmap.south west)},
+      placement=below right   ]
+    \path[every node/.style={below,inner sep=0.5mm,font=\sffamily\tiny}]
+      (mrcscalebar.south west) -- (mrcscalebar.south east)
+      node[pos=0]{0} node[pos=0.25]{50} node[pos=0.5]{100} node[pos=0.75]{150}
+      node[pos=1]{200} node[pos=1,right,yshift=1mm]{km};
+  \end{tikzpicture}
+  \end{dispExample}
+\end{docMrcKey}
+
+\pagebreak
+
+\begin{docMrcKey}{scalebar/placement}{=\meta{\tikzname\ positioning}}{no default, initially empty}
+  \meta{\tikzname\ positioning} of a scale bar in combination with
+  \refKey{/mermap/scalebar/at}. All \tikzname\ placement options for nodes
+  can be used, e.g. \texttt{above left} or \texttt{anchor=mid west}, etc.
+  Actually, \emph{any} node option could be applied here, but the intended use
+  is for placement options only.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{scalebar/south-east-inside}{\colOpt{=\meta{x shift};\meta{y shift}}}{default |0pt;0pt|, initially unset}
+  Shortcut for placing the scale bar at the south east corner of the map.
+  The optional \mbox{\meta{x shift}} and \meta{y shift} denote the
+  absolute shift values in each direction, i.e. the algebraic sign is
+  automatically complemented.
+  If only \meta{x shift} is given, then \meta{y shift} is set
+  to the same value. \refKey{/mermap/scalebar/at} and \refKey{/mermap/scalebar/placement}
+  are set by this option.
+\end{docMrcKey}
+
+\begin{docMrcKey}{scalebar/south-east-outside}{\colOpt{=\meta{x shift};\meta{y shift}}}{default |0pt;0pt|, initially unset}
+  Shortcut for placing the scale bar below the south east corner of the map.
+\end{docMrcKey}
+
+\begin{docMrcKey}{scalebar/south-west-inside}{\colOpt{=\meta{x shift};\meta{y shift}}}{default |0pt;0pt|, initially unset}
+  Shortcut for placing the scale bar at the south west corner of the map.
+\end{docMrcKey}
+
+\begin{docMrcKey}{scalebar/south-west-outside}{\colOpt{=\meta{x shift};\meta{y shift}}}{default |0pt;0pt|, initially unset}
+  Shortcut for placing the scale bar below the south west corner of the map.
+\end{docMrcKey}
+
+\begin{docMrcKey}{scalebar/north-west-inside}{\colOpt{=\meta{x shift};\meta{y shift}}}{default |0pt;0pt|, initially unset}
+  Shortcut for placing the scale bar at the north west corner of the map.
+\end{docMrcKey}
+
+\begin{docMrcKey}{scalebar/north-west-outside}{\colOpt{=\meta{x shift};\meta{y shift}}}{default |0pt;0pt|, initially unset}
+  Shortcut for placing the scale bar above the north west corner of the map.
+\end{docMrcKey}
+
+\begin{docMrcKey}{scalebar/north-east-inside}{\colOpt{=\meta{x shift};\meta{y shift}}}{default |0pt;0pt|, initially unset}
+  Shortcut for placing the scale bar at the north east corner of the map.
+\end{docMrcKey}
+
+\begin{docMrcKey}{scalebar/north-east-outside}{\colOpt{=\meta{x shift};\meta{y shift}}}{default |0pt;0pt|, initially unset}
+  Shortcut for placing the scale bar above the north east corner of the map.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{scalebar/major style}{=\marg{\tikzname\ options}}{no default, initially empty}
+  The \emph{major} part of the scale bar is a single \tikzname\ path object
+  which can be customized by the given \meta{\tikzname\ options}.
+  The \emph{major} part consists of the black area in the default case.
+  \tikzsetnextfilename{scales_scalebar4}
+  \begin{dispExample}
+  \begin{tikzpicture}
+    \mrcdrawscalebar[scale=2000000, width-in-km=100,
+        major style={left color=red,right color=blue}   ]
+  \end{tikzpicture}
+  \end{dispExample}
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{scalebar/minor style}{=\marg{\tikzname\ options}}{no default, initially empty}
+  The \emph{minor} part of the scale bar is a single \tikzname\ path object
+  which can be customized by the given \meta{\tikzname\ options}.
+  The \emph{minor} part is seen as holes in the default case.
+  \refKey{/mermap/scalebar/minor style} has only an effect, if
+  the minor part is drawn \refKey{/mermap/scalebar/solid}.
+  \tikzsetnextfilename{scales_scalebar5}
+  \begin{dispExample}
+  \begin{tikzpicture}
+    \mrcdrawscalebar[scale=2000000, width-in-km=100, solid,
+         minor style={yellow}  ]
+  \end{tikzpicture}
+  \end{dispExample}
+\end{docMrcKey}
+
+
+\pagebreak
+\begin{docMrcKey}{scalebar/double}{\colOpt{=true\textbar false}}{default |true|, initially |true|}
+  If set to |true|, the scale bar is drawn as a double ruler.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{scalebar/single}{\colOpt{=true\textbar false}}{default |true|, initially |false|}
+  If set to |true|, the scale bar is drawn as a single ruler.
+  \refKey{/mermap/scalebar/single} is inverse to \refKey{/mermap/scalebar/double}.
+  \tikzsetnextfilename{scales_scalebar6}
+  \begin{dispExample}
+  \begin{tikzpicture}
+    \mrcdrawscalebar[scale=2000000, width-in-km=100, single, height=1mm]
+  \end{tikzpicture}
+  \end{dispExample}
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{scalebar/transparent}{\colOpt{=true\textbar false}}{default |true|, initially |true|}
+  If set to |true|, the \emph{minor} part of the scale bar is drawn transparent,
+  i.e. as holes inside the ruler.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{scalebar/solid}{\colOpt{=true\textbar false}}{default |true|, initially |false|}
+  If set to |true|, the \emph{minor} part of the scale bar is drawn opaque.
+  It is drawn white or according to \refKey{/mermap/scalebar/minor style}.
+  \refKey{/mermap/scalebar/solid} is inverse to \refKey{/mermap/scalebar/transparent}.
+\end{docMrcKey}
+
+
+\begin{docMrcKey}{scalebar/scale}{=\meta{scale denominator}}{no default, initially unset}
+  Sets or overwrites the \meta{scale denominator} setting.
+  \textbf{Using this key is not needed and may even lead to erroneous displays
+    inside a |tikzpicture| with a defined map setting.}
+  This key is helpful, if a scale bar is used without a defined map.
+\end{docMrcKey}
+
diff --git a/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.sty b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.sty
new file mode 100644
index 00000000000..e2ecc0fe9fa
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.sty
@@ -0,0 +1,104 @@
+% !TeX root = mercatormap.tex
+% include file (style) of mercatormap.tex (manual of the LaTeX package mercatormap)
+\renewcommand*\l@subsection{\@dottedtocline{2}{1.5em}{2.7em}}
+\renewcommand*\l@subsubsection{\@dottedtocline{3}{4.2em}{3.2em}}
+
+\RequirePackage[T1]{fontenc}
+\RequirePackage[utf8]{inputenc}
+\RequirePackage[english]{babel}
+\RequirePackage{lmodern,parskip,array}
+\RequirePackage[svgnames,table,hyperref]{xcolor}
+\RequirePackage{tikz}
+\RequirePackage{varioref}
+\RequirePackage[makeindex]{imakeidx}
+\RequirePackage[bookmarks,raiselinks,pageanchor,hyperindex,colorlinks]{hyperref}
+\RequirePackage{varwidth,cleveref,incgraph}
+
+\RequirePackage[a4paper,left=2.5cm,right=2.5cm,top=1.5cm,bottom=1.5cm,
+    marginparsep=3mm,marginparwidth=18mm,
+    headheight=0mm,headsep=0cm,
+    footskip=1.5cm,includeheadfoot%,showframe
+    ]{geometry}
+\RequirePackage{fancyhdr}
+\fancyhf{}
+\fancyfoot[C]{\thepage}%
+\renewcommand{\headrulewidth}{0pt}
+\renewcommand{\footrulewidth}{0pt}
+\pagestyle{fancy}
+\tolerance=2000%
+\setlength{\emergencystretch}{20pt}%
+
+\RequirePackage{array,tabularx,booktabs}
+\RequirePackage{lipsum}
+\RequirePackage[extendedchars,encoding,filenameencoding=utf-8]{grffile}
+\RequirePackage{siunitx,xfp}
+
+\RequirePackage{tcolorbox}
+\tcbuselibrary{skins,xparse,minted,breakable,documentation,raster}
+
+\providecommand\mrcpkgprefix{}
+\RequirePackage{\mrcpkgprefix mercatormap}
+\IfFileExists{../private/privatekeys.tex}{\input{../private/privatekeys.tex}}{}
+
+\RequirePackage{csquotes}
+\RequirePackage[%style=authoryear,
+  style=numeric-comp,
+  sorting=nyt,urldate=long,
+  maxnames=8,minnames=8,abbreviate=false,backend=biber]{biblatex}
+\DeclareFieldFormat{url}{\newline\url{#1}}%
+\DeclareListFormat{language}{}%
+\setlength{\bibitemsep}{\smallskipamount}
+
+
+\definecolor{Green_Dark}{rgb}{0.078431,0.407843,0.176471}
+\definecolor{Blue_Dark}{rgb}{0.090196,0.211765,0.364706}
+\definecolor{Blue_Bright}{rgb}{0.858824,0.898039,0.945098}
+
+\colorlet{Blue_Gray}{blue!50!gray}
+
+\tcbset{skin=enhanced,
+  doc head={colback=yellow!10!white,interior style=fill},
+  doc head key={colback=magenta!5!white,interior style=fill},
+  color key=DarkViolet,
+  color value=Teal,
+  color color=Teal,
+  color counter=Orange!85!black,
+  color length=Orange!85!black,
+  index colorize,
+  index annotate,
+  beforeafter example/.style={
+    before skip=4pt plus 2pt minus 1pt,
+    after skip=8pt plus 4pt minus 2pt
+  },
+  docexample/.style={bicolor,
+    beforeafter example,
+    arc=0.66mm,
+    boxrule=0.33mm,
+    fonttitle=\bfseries,
+    fontlower=\footnotesize,
+    colframe=Blue_Gray,
+    colback=Blue_Gray!5!white,
+    colbacklower=white,
+    drop small lifted shadow,
+    listing engine=minted,
+    documentation minted options={tabsize=2,fontsize=\small,breaklines,autogobble},
+    documentation minted style=colorful,
+    },
+}
+\urlstyle{sf}
+
+\newtcblisting{fullexample}[1]{docexample,minted style=colorful,
+  listing and comment,pdf comment,freeze pdf,compilable listing,#1}
+
+\DeclareTotalTCBox{\myverb}{ O{} v }{tile,fontupper=\ttfamily,nobeforeafter,
+  tcbox raise base,boxsep=0.5mm,top=0pt,bottom=0pt,left=0pt,right=0pt,boxrule=0.3mm,
+  colback=yellow!10,
+  borderline horizontal={0.3mm}{0pt}{red!50},
+  #1}{#2}
+
+\tcbmakedocSubKey{docMrcKey}{mermap}
+\tcbmakedocSubKey{docTikzKey}{tikz}
+
+\def\tikzname{\textup{Ti\textit{k}Z}}
+
+\let\docNode\docValue
diff --git a/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.versionhistory.tex b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.versionhistory.tex
new file mode 100644
index 00000000000..9d5ece4dff5
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.doc.versionhistory.tex
@@ -0,0 +1,11 @@
+% !TeX root = mercatormap.tex
+% !TeX encoding=UTF-8
+% !TeX spellcheck=en_US
+% include file of mercatormap.tex (manual of the LaTeX package mercatormap)
+\clearpage
+\section{Version History}%
+
+\section*{v1.00 (2020/04/20)}
+\begin{itemize}
+\item Initial public release.
+\end{itemize}
diff --git a/Master/texmf-dist/doc/latex/mercatormap/mercatormap.pdf b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.pdf
new file mode 100644
index 00000000000..15bb306604f
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.pdf
diff --git a/Master/texmf-dist/doc/latex/mercatormap/mercatormap.tex b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.tex
new file mode 100644
index 00000000000..cba748e1815
--- /dev/null
+++ b/Master/texmf-dist/doc/latex/mercatormap/mercatormap.tex
@@ -0,0 +1,98 @@
+% \LaTeX-Main\
+% !TeX encoding=UTF-8
+% !TeX spellcheck=en_US
+%%
+%% The LaTeX package mercatormap - version 1.00 (2020/04/20)
+%% mercatormap.tex: Manual
+%%
+%% -------------------------------------------------------------------------------------------
+%% Copyright (c) 2020 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% -------------------------------------------------------------------------------------------
+%%
+%% This work may be distributed and/or modified under the
+%% conditions of the LaTeX Project Public License, either version 1.3
+%% of this license or (at your option) any later version.
+%% The latest version of this license is in
+%%   http://www.latex-project.org/lppl.txt
+%% and version 1.3 or later is part of all distributions of LaTeX
+%% version 2005/12/01 or later.
+%%
+%% This work has the LPPL maintenance status `author-maintained'.
+%%
+%% This work consists of all files listed in README
+%%
+% arara: pdflatex: { shell: yes }
+% arara: biber
+% arara: pdflatex: { shell: yes }
+% arara: pdflatex: { shell: yes }
+% arara: pdflatex: { shell: yes, synctex: yes }
+\documentclass[a4paper,11pt]{ltxdoc}
+\usepackage{mercatormap.doc}
+
+% The following personal API-keys are needed for compilation
+% \mrcsetapikey{openrouteservice}{YOUR-API-KEY}  % registered key
+% \mrcsetapikey{thunderforest}{YOUR-API-KEY}     % registered key
+
+\def\version{1.00}%
+\def\datum{2020/04/20}%
+
+\mrcactivatescript% activates Python script
+
+\addbibresource{mercatormap.bib}
+
+\hypersetup{
+  pdftitle={Manual for the mercatormap package},
+  pdfauthor={Thomas F. Sturm},
+  pdfsubject={Map drawing based on pixel map tiles with mercator projection},
+  pdfkeywords={map tiles, mercator projection, map drawing}
+}
+
+\makeindex
+
+\usetikzlibrary{external}
+\tikzsetexternalprefix{_figures/}
+\tikzexternalize
+\tikzexternaldisable% for final version
+\tcbset{shield externalize}
+
+\nocite{Sturm:2020,package:tikz,package:xparse,package:siunitx,package:expl3}
+
+\pdfsuppresswarningpagegroup=1
+
+%\includeonly{mercatormap.doc.intro}
+%\includeonly{mercatormap.doc.examples}
+%\includeonly{mercatormap.doc.definition}
+%\includeonly{mercatormap.doc.maptiles}
+%\includeonly{mercatormap.doc.drawing}
+%\includeonly{mercatormap.doc.scales}
+%\includeonly{mercatormap.doc.marker}
+%\includeonly{mercatormap.doc.routes}
+%\includeonly{mercatormap.doc.orthodromes}
+%\includeonly{mercatormap.doc.limitations}
+%\includeonly{mercatormap.doc.versionhistory}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\begin{document}
+
+\input{mercatormap.doc.abstract.tex}
+\include{mercatormap.doc.intro}
+\include{mercatormap.doc.examples}
+\include{mercatormap.doc.definition}
+\include{mercatormap.doc.maptiles}
+\include{mercatormap.doc.drawing}
+\include{mercatormap.doc.scales}
+\include{mercatormap.doc.marker}
+\include{mercatormap.doc.routes}
+\include{mercatormap.doc.orthodromes}
+\include{mercatormap.doc.limitations}
+\include{mercatormap.doc.versionhistory}
+
+\clearpage
+\phantomsection
+\printbibliography[heading=bibintoc]
+
+\clearpage
+\phantomsection
+\printindex
+
+\end{document}
diff --git a/Master/texmf-dist/tex/latex/mercatormap/mercatormap.sty b/Master/texmf-dist/tex/latex/mercatormap/mercatormap.sty
new file mode 100644
index 00000000000..d05872b77fe
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/mercatormap/mercatormap.sty
@@ -0,0 +1,2294 @@
+%% The LaTeX package mercatormap - version 1.00 (2020/04/20)
+%% mercatormap.sty: geographic coordinates (Mercator projection) and map tiles for TikZ pictures
+%%
+%% -------------------------------------------------------------------------------------------
+%% Copyright (c) 2020 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% -------------------------------------------------------------------------------------------
+%%
+%% This work may be distributed and/or modified under the
+%% conditions of the LaTeX Project Public License, either version 1.3
+%% of this license or (at your option) any later version.
+%% The latest version of this license is in
+%%   http://www.latex-project.org/lppl.txt
+%% and version 1.3 or later is part of all distributions of LaTeX
+%% version 2005/12/01 or later.
+%%
+%% This work has the LPPL maintenance status `author-maintained'.
+%%
+%% This work consists of all files listed in README
+%%
+\RequirePackage{expl3}[2020/02/25]
+\RequirePackage{xparse}
+\ProvidesExplPackage{mercatormap}{2020/04/20}{1.00}
+  {A Web Mercator projection package with map tile support}
+\@ifpackagelater { expl3 } { 2020/02/25 }
+  { }
+  {
+    \PackageError { mercatormap } { Support~package~expl3~too~old }
+      {
+        You~need~to~update~your~installation~of~the~bundles~'l3kernel'~and~
+        'l3packages'.\MessageBreak
+        Loading~mercatormap~will~abort!
+      }
+    \tex_endinput:D
+  }
+
+\RequirePackage{siunitx}
+\RequirePackage{graphicx,tikz,pdftexcmds}
+
+\ExplSyntaxOff
+% space character problem if within explSyntax
+\usetikzlibrary{shadings}
+\ExplSyntaxOn
+
+%\debug_on:n {all}
+
+
+\ProvideExpandableDocumentCommand \mrcpkgprefix {}{}
+
+\NewDocumentCommand\mermapset{ m } { \keys_set:nn { mermap } {#1} }
+\NewDocumentCommand\mermapsetsupply{ m } { \keys_set:nn { mermap/supply } {#1} }
+\NewDocumentCommand\mermapsetmarker{ m } { \keys_set:nn { mermap/marker } {#1} }
+
+
+%---- constants ----------------------------------------------------------------
+
+
+\fp_const:Nn \c__mermap_scale_radius_fp { 6371*pi/180 }
+\fp_const:Nn \c__mermap_mean_radius_fp { 637100000cm }
+\fp_const:Nn \c__mermap_mile_fp { 1.609344 }
+
+
+%---- map definition -----------------------------------------------------------
+
+\dim_new:N \l__mermap_tile_size_dim
+
+\fp_new:N \l__mermap_mapeast_fp
+\fp_new:N \l__mermap_mapnorth_fp
+\fp_new:N \l__mermap_mapsouth_fp
+\fp_new:N \l__mermap_mapwest_fp
+\fp_new:N \l__mermap_tex_height_fp
+\fp_new:N \l__mermap_tex_width_fp
+\fp_new:N \l__mermap_tile_northoffset_fp
+\fp_new:N \l__mermap_tile_southoffset_fp
+\fp_new:N \l__mermap_tile_westoffset_fp
+
+\int_new:N \l__mermap_tile_xmax_int
+\int_new:N \l__mermap_tile_xmin_int
+\int_new:N \l__mermap_tile_ymax_int
+\int_new:N \l__mermap_tile_ymin_int
+\int_new:N \l__mermap_tile_zoom_int
+
+\tl_new:N \l__mermap_attribution_print_tl
+\tl_new:N \l__mermap_attribution_tl
+\tl_new:N \l__mermap_pixel_height_tl
+\tl_new:N \l__mermap_pixel_width_tl
+\tl_new:N \l__mermap_tile_basename_tl
+\tl_new:N \l__mermap_tile_resource_tl
+
+
+\keys_define:nn { mermap/mapdef }
+  {
+    west        .fp_set:N  = \l__mermap_mapwest_fp,
+    east        .fp_set:N  = \l__mermap_mapeast_fp,
+    north       .fp_set:N  = \l__mermap_mapnorth_fp,
+    south       .fp_set:N  = \l__mermap_mapsouth_fp,
+    zoom        .int_set:N = \l__mermap_tile_zoom_int,
+    xmin        .int_set:N = \l__mermap_tile_xmin_int,
+    ymin        .int_set:N = \l__mermap_tile_ymin_int,
+    xmax        .int_set:N = \l__mermap_tile_xmax_int,
+    ymax        .int_set:N = \l__mermap_tile_ymax_int,
+    pixelwidth  .tl_set:N  = \l__mermap_pixel_width_tl,
+    pixelheight .tl_set:N  = \l__mermap_pixel_height_tl,
+    westoffset  .fp_set:N  = \l__mermap_tile_westoffset_fp,
+    northoffset .fp_set:N  = \l__mermap_tile_northoffset_fp,
+    southoffset .fp_set:N  = \l__mermap_tile_southoffset_fp,
+    basename    .tl_set:N  = \l__mermap_tile_basename_tl,
+    resource    .tl_set:N  = \l__mermap_tile_resource_tl,
+    attribution .tl_set:N  = \l__mermap_attribution_tl,
+    attribution~print .tl_set:N = \l__mermap_attribution_print_tl,
+    tile~size   .dim_set:N = \l__mermap_tile_size_dim,
+  }
+
+
+\NewDocumentCommand{\mrcdefinemap}{ m }
+  {
+    \keys_set:nn { mermap/mapdef }
+      {
+        west=11,
+        east=13,
+        north=50,
+        south=48,
+        zoom=9,
+        xmin=271,
+        ymin=173,
+        xmax=275,
+        ymax=177,
+        pixelwidth=100,
+        pixelheight=100,
+        westoffset=0,
+        northoffset=0,
+        southoffset=0,
+        basename=tiles/tile,
+        resource=none,
+        attribution=,
+        attribution~print=,
+        #1
+      }
+    \__mermap_reset:
+  }
+
+
+
+%---- coordinate system --------------------------------------------------------
+
+\fp_new:N \l__mermap_cs_lat_fp
+\fp_new:N \l__mermap_cs_lon_fp
+\fp_new:N \l__mermap_cs_southreference_fp
+\fp_new:N \l__mermap_cs_x_fp
+\fp_new:N \l__mermap_cs_xfactor_fp
+\fp_new:N \l__mermap_cs_y_fp
+\fp_new:N \l__mermap_cs_yfactor_fp
+\fp_new:N \l__mermap_result_fp
+\fp_new:N \l__mermap_scale_denominator_fp
+\fp_new:N \l__mermap_scale_fp
+\fp_new:N \l__mermap_vic_dim_fp
+\fp_new:N \l__mermap_vic_east_fp
+\fp_new:N \l__mermap_vic_north_fp
+\fp_new:N \l__mermap_vic_south_fp
+\fp_new:N \l__mermap_vic_west_fp
+\fp_new:N \l__mermap_vic_westeast_fp
+\fp_new:N \l__mermap_westeast_fp
+
+\int_new:N \l__mermap_tile_number_int
+
+
+\keys_define:nn { mermap }
+  {
+    vicinity .fp_set:N = \l__mermap_vic_dim_fp
+  }
+\keys_set:nn { mermap } { vicinity=2cm }
+
+
+\NewExpandableDocumentCommand\mrcmapwest{}{\fp_to_decimal:N \l__mermap_mapwest_fp}
+\NewExpandableDocumentCommand\mrcmapeast{}{\fp_to_decimal:N \l__mermap_mapeast_fp}
+\NewExpandableDocumentCommand\mrcmapnorth{}{\fp_to_decimal:N \l__mermap_mapnorth_fp}
+\NewExpandableDocumentCommand\mrcmapsouth{}{\fp_to_decimal:N \l__mermap_mapsouth_fp}
+\NewExpandableDocumentCommand\mrcpixelwidth{}{\tl_use:N \l__mermap_pixel_width_tl}
+\NewExpandableDocumentCommand\mrcpixelheight{}{\tl_use:N \l__mermap_pixel_height_tl}
+\NewDocumentCommand\mrcmapattribution{}{\tl_use:N \l__mermap_attribution_tl}
+\NewDocumentCommand\mrcmapattributionprint{}{\tl_use:N \l__mermap_attribution_print_tl}
+\NewExpandableDocumentCommand\mrctexwidth{}{\fp_to_dim:N \l__mermap_tex_width_fp}
+\NewExpandableDocumentCommand\mrctexheight{}{\fp_to_dim:N \l__mermap_tex_height_fp}
+\NewExpandableDocumentCommand\mrcscale{}{\fp_to_decimal:N \l__mermap_scale_fp}
+\NewExpandableDocumentCommand\mrcmapscaledenominator{}{\fp_to_decimal:N \l__mermap_scale_denominator_fp}
+
+
+\cs_new_nopar:Npn \__mermap_reset:
+  {
+    \int_set:Nn \l__mermap_tile_number_int { \fp_to_int:n { 2^\l__mermap_tile_zoom_int }}
+    \fp_set:Nn \l__mermap_westeast_fp    { \l__mermap_mapeast_fp-\l__mermap_mapwest_fp }
+    \fp_set:Nn \l__mermap_cs_xfactor_fp  { \l__mermap_tile_size_dim*\l__mermap_tile_number_int/360 }
+    \fp_set:Nn \l__mermap_cs_yfactor_fp  { \l__mermap_tile_size_dim*\l__mermap_tile_number_int/2pi }
+    \fp_set:Nn \l__mermap_cs_southreference_fp { tand(\l__mermap_mapsouth_fp/2+45) }
+
+    \__mermap_longitude_to_x:n { \l__mermap_mapwest_fp }
+    \__mermap_x_to_longitude:n { \l__mermap_cs_x_fp - \l__mermap_vic_dim_fp }
+    \fp_set_eq:NN \l__mermap_vic_west_fp \l__mermap_cs_lon_fp
+
+    \__mermap_longitude_to_x:n { \l__mermap_mapeast_fp }
+    \__mermap_x_to_longitude:n { \l__mermap_cs_x_fp + \l__mermap_vic_dim_fp }
+    \fp_set_eq:NN \l__mermap_vic_east_fp \l__mermap_cs_lon_fp
+
+    \__mermap_latitude_to_y:n { \l__mermap_mapsouth_fp }
+    \__mermap_y_to_latitude:n { \l__mermap_cs_y_fp - \l__mermap_vic_dim_fp }
+    \fp_set_eq:NN \l__mermap_vic_south_fp \l__mermap_cs_lat_fp
+
+    \__mermap_latitude_to_y:n { \l__mermap_mapnorth_fp }
+    \fp_set_eq:NN \l__mermap_tex_height_fp \l__mermap_cs_y_fp
+    \__mermap_y_to_latitude:n { \l__mermap_cs_y_fp + \l__mermap_vic_dim_fp }
+    \fp_set_eq:NN \l__mermap_vic_north_fp \l__mermap_cs_lat_fp
+
+    \fp_set:Nn \l__mermap_tex_width_fp { \l__mermap_westeast_fp*\l__mermap_cs_xfactor_fp }
+
+    \fp_set:Nn \l__mermap_vic_westeast_fp { \l__mermap_vic_east_fp - \l__mermap_vic_west_fp }
+
+    \__mermap_mean_latitude:NN \l__mermap_mapsouth_fp \l__mermap_mapnorth_fp
+    \fp_set:Nn \l__mermap_scale_denominator_fp { 2*\c__mermap_mean_radius_fp
+      *cosd(\l__mermap_result_fp)*pi/\l__mermap_tile_number_int/\l__mermap_tile_size_dim }
+    \fp_set:Nn \l__mermap_scale_fp { \l__mermap_scale_denominator_fp / (1cm*100000) }
+
+    \__mermap_if_inside_picture_environment:T
+      {
+        \node[name=mrcmap,at={(0,0)},above~right,
+          line~width=0mm,inner~sep=0mm,outer~sep=0mm,draw=none,fill=none,rectangle,
+          minimum~width=\mrctexwidth,minimum~height=\mrctexheight]{};
+      }
+  }
+
+
+\cs_new_nopar:Npn \__mermap_mean_latitude:NN #1#2
+  {
+    \fp_set:Nn \l__mermap_result_fp { 2*atand(sqrt(tand(#1/2+45)*tand(#2/2+45))) - 90 }
+  }
+
+
+\cs_new_nopar:Npn \__mermap_longitude_to_x:n #1
+  {
+    \fp_set:Nn \l_tmpa_fp { #1-\l__mermap_mapwest_fp }
+    \fp_sub:Nn \l_tmpa_fp { 360*floor(\l_tmpa_fp/360) }
+    \fp_set:Nn \l_tmpa_fp
+      { \l_tmpa_fp>\l__mermap_westeast_fp
+          ?(\l_tmpa_fp-\l__mermap_westeast_fp>360-\l_tmpa_fp
+            ?\l_tmpa_fp-360
+            :\l_tmpa_fp)
+          :\l_tmpa_fp
+      }
+    \fp_set:Nn \l__mermap_cs_x_fp { \l_tmpa_fp*\l__mermap_cs_xfactor_fp }
+  }
+
+
+\cs_new_nopar:Npn \__mermap_latitude_to_y:n #1
+  {
+    \fp_set:Nn \l__mermap_cs_y_fp
+    {
+      ln( tand((#1)/2+45)/\l__mermap_cs_southreference_fp ) * \l__mermap_cs_yfactor_fp
+    }
+  }
+
+
+\cs_new_nopar:Npn \__mermap_x_to_longitude:n #1
+  {
+    \fp_set:Nn \l__mermap_cs_lon_fp { \l__mermap_mapwest_fp+(#1)/\l__mermap_cs_xfactor_fp }
+  }
+
+
+\cs_new_nopar:Npn \__mermap_y_to_latitude:n #1
+  {
+    \fp_set:Nn \l__mermap_cs_lat_fp
+    {
+      2*atand( \l__mermap_cs_southreference_fp*exp((#1)/\l__mermap_cs_yfactor_fp) ) - 90
+    }
+  }
+
+
+\cs_new_nopar:Npn \__mermap_pgfpoint:nn #1#2
+  {
+    \__mermap_latitude_to_y:n  {#1}
+    \__mermap_longitude_to_x:n {#2}
+    \pgfpoint{\fp_to_dim:N \l__mermap_cs_x_fp}
+             {\fp_to_dim:N \l__mermap_cs_y_fp}
+  }
+
+
+\use:x
+  {
+    \cs_new_nopar:Npn \exp_not:N\__mermap_pgfpoint:w ##1 \c_colon_str ##2 \exp_not:N \q_stop
+  }
+  {
+    \__mermap_pgfpoint:nn {#1}{#2}
+  }
+
+
+\cs_new_nopar:Npn \__mermap_pgfpoint:n #1
+  {
+    \__mermap_pgfpoint:w #1 \q_stop
+  }
+
+
+\NewDocumentCommand{\mrcpgfpoint}{ mm }{ \__mermap_pgfpoint:nn {#1}{#2} }
+
+
+\keys_define:nn { mermap/cs }
+  {
+    latitude  .code:n = \__mermap_latitude_to_y:n {#1},
+    longitude .code:n = \__mermap_longitude_to_x:n{#1},
+    lat       .code:n = \__mermap_latitude_to_y:n {#1},
+    lon       .code:n = \__mermap_longitude_to_x:n{#1},
+  }
+
+
+\tikzdeclarecoordinatesystem{__mrc}
+  {
+    \__mermap_pgfpoint:nn #1
+  }
+
+
+\tikzdeclarecoordinatesystem{mrcq}
+  {
+    \__mermap_pgfpoint:w #1 \q_stop
+  }
+
+
+\tikzdeclarecoordinatesystem{mrc}%
+  {
+    \keys_set:nn { mermap/cs }{ #1 }
+    \pgfpoint{\fp_to_dim:N \l__mermap_cs_x_fp}
+             {\fp_to_dim:N \l__mermap_cs_y_fp}
+  }
+
+
+\prg_new_conditional:Npnn \__mermap_if_in_map:nn #1#2 { p, TF }
+  {
+    \fp_compare:nNnTF {#1} > \l__mermap_mapnorth_fp
+    {
+      \prg_return_false:
+    }
+    {
+      \fp_compare:nNnTF {#1} < \l__mermap_mapsouth_fp
+      {
+        \prg_return_false:
+      }
+      {
+        \fp_set:Nn \l_tmpa_fp { #2-\l__mermap_mapwest_fp }
+        \fp_sub:Nn \l_tmpa_fp { 360*floor(\l_tmpa_fp/360) }
+        \fp_compare:nNnTF \l_tmpa_fp > \l__mermap_westeast_fp
+        {
+          \prg_return_false:
+        }
+        {
+          \fp_set:Nn \l__mermap_cs_x_fp { \l_tmpa_fp*\l__mermap_cs_xfactor_fp }
+          \__mermap_latitude_to_y:n {#1}
+          \pgfnoderename{mrclastpos}{mrcpos}
+          \pgfcoordinate{mrcpos}{
+            \pgfpoint{\fp_to_dim:N \l__mermap_cs_x_fp}
+                     {\fp_to_dim:N \l__mermap_cs_y_fp}
+          }
+          \prg_return_true:
+        }
+      }
+    }
+  }
+
+\NewDocumentCommand{\ifmrcinmap}{ mm }
+  {
+    \__mermap_if_in_map:nnTF{#1}{#2}
+  }
+
+
+\prg_new_conditional:Npnn \__mermap_if_in_vicinity:nn #1#2 { p, TF }
+  {
+    \fp_compare:nNnTF {#1} > \l__mermap_vic_north_fp
+    {
+      \prg_return_false:
+    }
+    {
+      \fp_compare:nNnTF {#1} < \l__mermap_vic_south_fp
+      {
+        \prg_return_false:
+      }
+      {
+        \fp_set:Nn \l_tmpa_fp { #2-\l__mermap_vic_west_fp }
+        \fp_sub:Nn \l_tmpa_fp { 360*floor(\l_tmpa_fp/360) }
+        \fp_compare:nNnTF \l_tmpa_fp > \l__mermap_vic_westeast_fp
+        {
+          \prg_return_false:
+        }
+        {
+          \fp_set:Nn \l__mermap_cs_x_fp { \l_tmpa_fp*\l__mermap_cs_xfactor_fp - \l__mermap_vic_dim_fp }
+          \__mermap_latitude_to_y:n {#1}
+          \pgfnoderename{mrclastpos}{mrcpos}
+          \pgfcoordinate{mrcpos}{
+            \pgfpoint{\fp_to_dim:N \l__mermap_cs_x_fp}
+                     {\fp_to_dim:N \l__mermap_cs_y_fp}
+          }
+          \prg_return_true:
+        }
+      }
+    }
+  }
+
+\NewDocumentCommand{\ifmrcinvicinity}{ mm }
+  {
+    \__mermap_if_in_vicinity:nnTF{#1}{#2}
+  }
+
+
+
+
+%---- named positions ----------------------------------------------------------
+
+
+\cs_new_nopar:Npn \__mermap_set_named_position #1#2#3
+  {
+    \cs_set_nopar:cpx {__mermap__lat__#1} { \fp_to_decimal:n {#2} }
+    \cs_set_nopar:cpx {__mermap__lon__#1} { \fp_to_decimal:n {#3} }
+  }
+
+
+\NewDocumentCommand{\mrcNPdef}{ mmm }
+  {
+    \__mermap_set_named_position{#1}{#2}{#3}
+  }
+
+
+\NewDocumentCommand{\mrcNPfrompoint}{ mm }
+  {
+    \path (#2);
+    \__mermap_y_to_latitude:n {\pgf@y}
+    \__mermap_x_to_longitude:n{\pgf@x}
+    \__mermap_set_named_position {#1}
+      {\fp_to_decimal:N \l__mermap_cs_lat_fp}
+      {\fp_to_decimal:N \l__mermap_cs_lon_fp}
+  }
+
+
+\msg_new:nnnn{ mercatormap }{ np-undefined }
+  { Named~point~'#1'~is~undefined. }
+  {
+    The~named~point~'#1'~is~not~known:~
+    perhaps~it~is~spelled~incorrectly.
+  }
+
+
+\NewExpandableDocumentCommand \mrcNPlat { m }
+  {
+    \cs_if_exist_use:cF{__mermap__lat__#1}
+    {
+      \msg_error:nnx{ mercatormap }{ np-undefined }{ #1 }
+    }
+  }
+
+
+\NewExpandableDocumentCommand \mrcNPlon { m }
+  {
+    \cs_if_exist_use:cF{__mermap__lon__#1}
+    {
+      \msg_error:nnx{ mercatormap }{ np-undefined }{ #1 }
+    }
+  }
+
+
+\NewExpandableDocumentCommand \mrcNPcs { m }
+  {
+    __mrc~cs \c_colon_str {{\mrcNPlat{#1}}{\mrcNPlon{#1}}}
+  }
+
+
+\NewDocumentCommand{\ifmrcNPinmap}{ m }
+  {
+    \__mermap_if_in_map:nnTF{\mrcNPlat{#1}}{\mrcNPlon{#1}}
+  }
+
+
+\NewDocumentCommand{\ifmrcNPinvicinity}{ m }
+  {
+    \__mermap_if_in_vicinity:nnTF{\mrcNPlat{#1}}{\mrcNPlon{#1}}
+  }
+
+
+
+%---- map tile download --------------------------------------------------------
+
+\group_begin:
+\char_set_catcode_space:n {`\ }
+\char_set_catcode_other:n {`\"}
+
+\tl_const:Nn \c__mermap_supply_call_boundaries_tl
+  {%
+    \l__mermap_python\c_space_tl boundaries
+      -u   "\str_use:N\l__mermap_supply_url_str"
+      -at  "\str_use:N\l__mermap_supply_attribution_str"
+      -atp "\str_use:N\l__mermap_supply_attribution_print_str"
+      -f   "\l__mermap_supply_basename_tl"
+      -z    \int_use:N\l__mermap_supply_zoom_int\c_space_tl
+      -w    \fp_use:N\l__mermap_supply_west_fp\c_space_tl
+      -e    \fp_use:N\l__mermap_supply_east_fp\c_space_tl
+      -n    \fp_use:N\l__mermap_supply_north_fp\c_space_tl
+      -s    \fp_use:N\l__mermap_supply_south_fp\c_space_tl
+      -p    \l__mermap_supply_pixel_tl\c_space_tl
+      -ts   \dim_use:N\l__mermap_tile_size_dim\c_space_tl
+      -t    \l__mermap_supply_target_tl\c_space_tl
+      -d   "\str_use:N\l__mermap_definition_id_str"
+  }
+
+\tl_const:Nn \c__mermap_supply_call_reference_tl
+  {%
+    \l__mermap_python\c_space_tl reference
+      -u   "\str_use:N\l__mermap_supply_url_str"
+      -at  "\str_use:N\l__mermap_supply_attribution_str"
+      -atp "\str_use:N\l__mermap_supply_attribution_print_str"
+      -f   "\l__mermap_supply_basename_tl"
+      -mw   \fp_use:N\l__mermap_supply_width_fp\c_space_tl
+      -mh   \fp_use:N\l__mermap_supply_height_fp\c_space_tl
+      -z    \int_use:N\l__mermap_supply_zoom_int\c_space_tl
+      -lat  \fp_use:N\l__mermap_supply_latitude_fp\c_space_tl
+      -lon  \fp_use:N\l__mermap_supply_longitude_fp\c_space_tl
+      -a    \l__mermap_supply_align_tl\c_space_tl
+      -p    \l__mermap_supply_pixel_tl\c_space_tl
+      -ts   \dim_use:N\l__mermap_tile_size_dim\c_space_tl
+      -t    \l__mermap_supply_target_tl\c_space_tl
+      -d   "\str_use:N\l__mermap_definition_id_str"
+  }
+
+
+\tl_const:Nn \c__mermap_supply_call_areafit_tl
+  {%
+    \l__mermap_python\c_space_tl areafit
+      -u   "\str_use:N\l__mermap_supply_url_str"
+      -at  "\str_use:N\l__mermap_supply_attribution_str"
+      -atp "\str_use:N\l__mermap_supply_attribution_print_str"
+      -f   "\l__mermap_supply_basename_tl"
+      -mw   \fp_use:N\l__mermap_supply_width_fp\c_space_tl
+      -mh   \fp_use:N\l__mermap_supply_height_fp\c_space_tl
+      -w    \fp_use:N\l__mermap_supply_west_fp\c_space_tl
+      -e    \fp_use:N\l__mermap_supply_east_fp\c_space_tl
+      -n    \fp_use:N\l__mermap_supply_north_fp\c_space_tl
+      -s    \fp_use:N\l__mermap_supply_south_fp\c_space_tl
+      -a    \l__mermap_supply_align_tl\c_space_tl
+      -p    \l__mermap_supply_pixel_tl\c_space_tl
+      -ts   \dim_use:N\l__mermap_tile_size_dim\c_space_tl
+      -t    \l__mermap_supply_target_tl\c_space_tl
+      -d   "\str_use:N\l__mermap_definition_id_str"
+  }
+
+\group_end:
+
+
+\bool_new:N \l__mermap_script_activated_bool
+
+\fp_new:N \l__mermap_supply_east_fp
+\fp_new:N \l__mermap_supply_height_fp
+\fp_new:N \l__mermap_supply_latitude_fp
+\fp_new:N \l__mermap_supply_longitude_fp
+\fp_new:N \l__mermap_supply_north_fp
+\fp_new:N \l__mermap_supply_south_fp
+\fp_new:N \l__mermap_supply_west_fp
+\fp_new:N \l__mermap_supply_width_fp
+
+\int_new:N \g__mermap_automap_int
+\int_new:N \l__mermap_supply_zoom_int
+
+\iow_new:N \l__mermap_iow
+
+\prop_new:N \g__mermap_apikey_prop
+\prop_new:N \g__mermap_definition_prop
+
+\str_new:N \l__mermap_definition_id_str
+\str_new:N \l__mermap_definition_postfix_str
+\str_new:N \l__mermap_definition_prefix_str
+\str_new:N \l__mermap_supply_attribution_print_str
+\str_new:N \l__mermap_supply_attribution_str
+\str_new:N \l__mermap_supply_url_str
+
+\tl_new:N \l__mermap_last_mdfivesum_tl
+\tl_new:N \l__mermap_mdfivesum_tl
+\tl_new:N \l__mermap_python
+\tl_new:N \l__mermap_supply_align_tl
+\tl_new:N \l__mermap_supply_basename_tl
+\tl_new:N \l__mermap_supply_call_tl
+\tl_new:N \l__mermap_supply_pixel_tl
+\tl_new:N \l__mermap_supply_target_tl
+\tl_new:N \l__mermap_supply_type_tl
+
+
+\use:x
+  {
+    \cs_new_nopar:Npn \exp_not:N\__mermap_supply_position:w ##1 \c_colon_str ##2 \exp_not:N \q_stop
+  }
+  {
+    \fp_set:Nn \l__mermap_supply_latitude_fp {#1}
+    \fp_set:Nn \l__mermap_supply_longitude_fp {#2}
+  }
+
+
+\msg_new:nnnn{ mercatormap }{ api-key-undefined }
+  { Api~key~'#1'~is~undefined. }
+  {
+    You~have~to~set~\token_to_str:N \mrcsetapikey
+      \iow_char:N \{#1\iow_char:N \}
+      \iow_char:N \{your~key\iow_char:N \}~first.
+  }
+
+\cs_new:Npn \__mermap_supply_url_with_api_key:nnn #1#2#3
+  {
+    \str_set:Nn \l__mermap_supply_url_str {#1}
+    \prop_get:NnNF \g__mermap_apikey_prop {#2} \l_tmpa_tl
+      {
+        \msg_error:nnx{ mercatormap }{ api-key-undefined }{ #2 }
+      }
+    \str_put_right:NV \l__mermap_supply_url_str \l_tmpa_tl
+    \str_put_right:Nn \l__mermap_supply_url_str {#3}
+  }
+
+
+\cs_new:Npn \__mermap_supply_add_area_clist:N #1
+  {
+    \clist_map_inline:Nn #1
+      {
+        \cs_if_exist:cF{__mermap__lat__##1}
+        {
+          \msg_error:nnx{ mercatormap }{ np-undefined }{ ##1 }
+        }
+        \fp_set:Nn \l_tmpa_fp { \mrcNPlat{##1} }
+        \fp_compare:nNnT \l_tmpa_fp < \l__mermap_supply_south_fp
+          { \fp_set_eq:NN \l__mermap_supply_south_fp \l_tmpa_fp }
+        \fp_compare:nNnT \l_tmpa_fp > \l__mermap_supply_north_fp
+          { \fp_set_eq:NN \l__mermap_supply_north_fp \l_tmpa_fp }
+        \fp_set:Nn \l_tmpa_fp { \mrcNPlon{##1} }
+        \fp_compare:nNnT \l_tmpa_fp < \l__mermap_supply_west_fp
+          { \fp_set_eq:NN \l__mermap_supply_west_fp \l_tmpa_fp }
+        \fp_compare:nNnT \l_tmpa_fp > \l__mermap_supply_east_fp
+          { \fp_set_eq:NN \l__mermap_supply_east_fp \l_tmpa_fp }
+      }
+  }
+
+
+\keys_define:nn { mermap/supply }
+  {
+    zoom            .int_set:N = \l__mermap_supply_zoom_int,
+    west            .fp_set:N  = \l__mermap_supply_west_fp,
+    east            .fp_set:N  = \l__mermap_supply_east_fp,
+    north           .fp_set:N  = \l__mermap_supply_north_fp,
+    south           .fp_set:N  = \l__mermap_supply_south_fp,
+    latitude        .fp_set:N  = \l__mermap_supply_latitude_fp,
+    longitude       .fp_set:N  = \l__mermap_supply_longitude_fp,
+    position        .code:n    = {\__mermap_supply_position:w #1 \q_stop},
+    named~position  .meta:nn   = {mermap/supply}{latitude=\mrcNPlat{#1},longitude=\mrcNPlon{#1}},
+    width           .fp_set:N  = \l__mermap_supply_width_fp,
+    height          .fp_set:N  = \l__mermap_supply_height_fp,
+    align           .tl_set:N  = \l__mermap_supply_align_tl,
+    url             .code:n    = {\str_set:Nn\l__mermap_supply_url_str {#1}},
+    url~with~api~key  .code:n  = {\__mermap_supply_url_with_api_key:nnn #1},
+    basename        .tl_set:N  = \l__mermap_supply_basename_tl,
+    type            .tl_set:N  = \l__mermap_supply_type_tl,
+    target          .tl_set:N  = \l__mermap_supply_target_tl,
+    pixel           .tl_set:N  = \l__mermap_supply_pixel_tl,
+    attribution     .code:n    = {
+        \str_set:Nn \l__mermap_supply_attribution_str {#1}
+        \tl_set_rescan:Nnn \l__mermap_attribution_tl {}{#1}
+      },
+    attribution~print .code:n =  {
+        \str_set:Nn \l__mermap_supply_attribution_print_str {#1}
+        \tl_set_rescan:Nnn \l__mermap_attribution_print_tl {}{#1}
+      },
+    dpi .code:n = {
+      \tl_set:Nx \l__mermap_supply_pixel_tl {
+        \fp_to_int:n { round(#1*\l__mermap_tile_size_dim/1in) }
+      }},
+    tex~width .code:n = {
+      \fp_set:Nn \l__mermap_supply_width_fp{#1/\l__mermap_tile_size_dim}},
+    tex~height .code:n = {
+      \fp_set:Nn \l__mermap_supply_height_fp{#1/\l__mermap_tile_size_dim}},
+    source .code:n = { \exp_args:Nnx \keys_set:nn {mermap/supply} {_source=#1} },
+    source .value_required:n = true,
+    _source .choice:,
+    area .code:n =
+    {
+      \clist_set:Nn \l_tmpa_clist { #1 }
+      \fp_set:Nn \l__mermap_supply_west_fp { inf }
+      \fp_set:Nn \l__mermap_supply_east_fp { -inf }
+      \fp_set:Nn \l__mermap_supply_south_fp { 89 }
+      \fp_set:Nn \l__mermap_supply_north_fp { -89 }
+      \__mermap_supply_add_area_clist:N \l_tmpa_clist
+    },
+    area .value_required:n = true,
+    add~area .code:n =
+    {
+      \clist_set:Nn \l_tmpa_clist { #1 }
+      \__mermap_supply_add_area_clist:N \l_tmpa_clist
+    },
+    flex~reference~scale .code:n = {
+      \__mermap_set_flex_scale:nn {#1} {\l__mermap_supply_latitude_fp}
+      },
+    flex~reference~scale .value_required:n = true,
+    area~to~reference  .code:n = {
+      \fp_set:Nn \l__mermap_supply_longitude_fp { (\l__mermap_supply_west_fp+\l__mermap_supply_east_fp)/2 }
+      \__mermap_mean_latitude:NN \l__mermap_supply_north_fp \l__mermap_supply_south_fp
+      \fp_set_eq:NN \l__mermap_supply_latitude_fp \l__mermap_result_fp
+    },
+    area~to~reference .value_forbidden:n = true,
+    flex~area~scale   .meta:nn = {mermap/supply}{area~to~reference,flex~reference~scale={#1}},
+    flex~area~scale   .value_required:n = true,
+    flex~area~fit .code:n = {
+      \fp_compare:nNnF \l__mermap_tile_size_dim = \l__mermap_flex_tile_size_dim
+        {
+          \fp_set:Nn \l_tmpa_fp { \l__mermap_tile_size_dim/\l__mermap_flex_tile_size_dim }
+          \fp_set:Nn \l__mermap_supply_width_fp{\l__mermap_supply_width_fp*\l_tmpa_fp}
+          \fp_set:Nn \l__mermap_supply_height_fp{\l__mermap_supply_height_fp*\l_tmpa_fp}
+        }
+      \fp_set:Nn \l__mermap_supply_width_fp{\l__mermap_supply_width_fp-(#1)/\l__mermap_flex_tile_size_dim}
+      \fp_set:Nn \l__mermap_supply_height_fp{\l__mermap_supply_height_fp-(#1)/\l__mermap_flex_tile_size_dim}
+      \fp_set:Nn \l_tmpa_fp { min ( 180*\l__mermap_supply_width_fp / (\l__mermap_supply_east_fp-\l__mermap_supply_west_fp)
+        , pi*\l__mermap_supply_height_fp / ln( tand(\l__mermap_supply_north_fp/2+45) / tand(\l__mermap_supply_south_fp/2+45) ) ) }
+      \fp_set:Nn \l_tmpb_fp { ln(\l_tmpa_fp)/ln(2) }
+      \fp_set:Nn \l_tmpb_fp { round(\l_tmpb_fp)/\l_tmpb_fp }
+      \fp_set:Nn \l_tmpb_fp { \l_tmpa_fp^(\l_tmpb_fp-1+0.0000001) }
+      \dim_set:Nn \l__mermap_tile_size_dim { \fp_to_dim:n { \l__mermap_flex_tile_size_dim / \l_tmpb_fp }}
+      \fp_set:Nn \l__mermap_supply_width_fp { \l__mermap_supply_width_fp * \l_tmpb_fp + (#1)/\l__mermap_tile_size_dim }
+      \fp_set:Nn \l__mermap_supply_height_fp { \l__mermap_supply_height_fp * \l_tmpb_fp + (#1)/\l__mermap_tile_size_dim }
+    },
+    flex~area~fit .default:n = 0pt,
+  }
+
+
+\keys_set:nn { mermap/supply }
+  {
+    zoom=9,
+    north=50,
+    south=48,
+    west=11,
+    east=13,
+    latitude=49,
+    longitude=12,
+    width=4,
+    height=4,
+    align=center,
+    basename=tiles/tile,
+    url=,
+    attribution=,
+    attribution~print=,
+    type=reference,
+    pixel=256,
+    target=tiles,
+  }
+
+
+\keys_define:nn { mermap }
+  {
+    definition~prefix .code:n = {\str_set:Nn\l__mermap_definition_prefix_str{#1}},
+    python              .code:n = {
+      \tl_set:Nx \l__mermap_python {#1~maptiles.texpy}
+      },
+  }
+
+\keys_set:nn { mermap }
+  {
+    definition~prefix = maps/,
+    python = python,
+  }
+
+
+\msg_new:nnn { mercatormap }{ python-script }
+  { Python~script~'maptiles.texpy'~is~created~(for~map~tile~download). }
+
+
+\NewDocumentCommand \mrcactivatescript {}
+  {
+    \msg_info:nn { mercatormap }{ python-script }
+    \group_begin:
+    \def\@latex@warning@no@line##1{}% suppress filecontents warning
+    \file_input:n {\mrcpkgprefix mercatorpy.def}
+    \group_end:
+    \bool_set_true:N \l__mermap_script_activated_bool
+  }
+\@onlypreamble\mrcactivatescript
+
+
+\NewDocumentCommand \mrcsetapikey { mm }
+  {
+     \prop_gput:Nnn \g__mermap_apikey_prop {#1}{#2}
+  }
+
+
+\cs_new:Npn \__mermap_create_definition_id:n #1
+  {
+    \tl_set:Nx \l_tmpa_tl {#1}
+    \tl_trim_spaces:N \l_tmpa_tl
+    \str_set:Nx \l__mermap_definition_postfix_str {\tl_to_str:N \l_tmpa_tl}
+    \str_concat:NNN \l__mermap_definition_id_str
+      \l__mermap_definition_prefix_str \l__mermap_definition_postfix_str
+  }
+
+\cs_new:Npn \__mermap_map:nn #1#2
+  {
+    \tl_set:Nx \l_tmpa_tl {#2}
+    \tl_trim_spaces:N \l_tmpa_tl
+    \tl_if_empty:NT \l_tmpa_tl
+      {
+        \int_gincr:N \g__mermap_automap_int
+        \tl_set:Nx \l_tmpa_tl
+          {
+            automap-
+            \int_compare:nNnTF \g__mermap_automap_int<{10} {000}
+            {
+              \int_compare:nNnTF \g__mermap_automap_int<{100} {00}
+              {
+                \int_compare:nNnTF \g__mermap_automap_int<{1000} {0} {}
+              }
+            }
+            \int_use:N \g__mermap_automap_int
+          }
+      }
+    \str_set:Nx \l__mermap_definition_postfix_str {\tl_to_str:N \l_tmpa_tl}
+    \str_concat:NNN \l__mermap_definition_id_str
+    \l__mermap_definition_prefix_str \l__mermap_definition_postfix_str
+    \__mermap_supplymap:n {#1}
+    \__mermap_applymap:
+  }
+
+\NewDocumentCommand \mrcmap { O{} m }
+  {
+    \__mermap_map:nn {#1}{#2}
+  }
+
+
+\msg_new:nnn{ mercatormap }{ definition-id-used }
+  { Map~definition~'#1'~already~existing }
+
+
+\cs_new:Npn \__mermap_supplymap:n #1
+  {
+    \group_begin:
+    \keys_set:nn { mermap/supply } { #1 }
+    \tl_set:Nx \l_tmpa_tl { \str_use:N\l__mermap_definition_id_str }
+    \prop_if_in:NVT \g__mermap_definition_prop \l_tmpa_tl
+      {
+        \msg_warning:nnx { mercatormap }{ definition-id-used }{ \tl_use:N \l_tmpa_tl }
+      }
+    \prop_gput:NVn \g__mermap_definition_prop \l_tmpa_tl {}
+    \bool_if:NT \l__mermap_script_activated_bool
+    {
+      \__mermap_supplymap_call:
+    }
+    %\dim_gset_eq:NN \g_tmpa_dim \l__mermap_tile_size_dim
+    \group_end:
+    %\dim_set_eq:NN \l__mermap_tile_size_dim \g_tmpa_dim
+  }
+
+\NewDocumentCommand \mrcsupplymap { O{} m }
+  {
+    \__mermap_create_definition_id:n {#2}
+    \__mermap_supplymap:n {#1}
+  }
+
+
+\msg_new:nnn { mercatormap }{ shell-escape }
+  { You~must~invoke~LaTeX~with~the~--shell-escape~flag~to~produce~map~'#1'. }
+
+\msg_new:nnn { mercatormap }{ target-resource }
+  { Target~and~produced~resource~are~different~for~map~'#1'. }
+
+\msg_new:nnn { mercatormap }{ definition-production }
+  { Map~definition~file~not~produced~for~map~'#1'. }
+
+\cs_new:Npn \__mermap_supplymap_call:
+  {
+    \tl_set_eq:Nc \l_tmpa_tl {
+      c__mermap_supply_call_\l__mermap_supply_type_tl _tl }
+    \tl_set:Nx \l__mermap_supply_call_tl \l_tmpa_tl
+    \tl_set:Nx \l__mermap_mdfivesum_tl { \pdf@mdfivesum{\l__mermap_supply_call_tl} }
+    \tl_clear:N \l__mermap_last_mdfivesum_tl
+    \file_if_exist_input:n {\l__mermap_definition_id_str.md5}
+    \str_if_eq:VVTF \l__mermap_mdfivesum_tl \l__mermap_last_mdfivesum_tl
+      {
+        \file_if_exist:nF {\l__mermap_definition_id_str.def}
+          {
+            \__mermap_supplymap_call_shell:
+          }
+      }
+      {
+        \__mermap_supplymap_call_shell:
+      }
+  }
+
+\cs_new:Npn \__mermap_supplymap_call_shell:
+  {
+    \sys_if_shell_unrestricted:TF
+      {
+        \file_if_exist:nT {\l__mermap_definition_id_str.def}
+          {
+            \iow_open:Nn \l__mermap_iow {\l__mermap_definition_id_str.def}
+            \iow_now:Nx  \l__mermap_iow {\c_backslash_str def \c_backslash_str mrcdefinemap{} \c_percent_str}
+            \iow_close:N \l__mermap_iow
+          }
+
+        \sys_shell_now:x {\l__mermap_supply_call_tl}
+
+        \file_if_exist:nTF {\l__mermap_definition_id_str.def}
+          {
+            \file_input:n {\l__mermap_definition_id_str.def}
+            \str_if_eq:VVTF \l__mermap_supply_target_tl \l__mermap_tile_resource_tl
+              {
+                \__mermap_write_mdfive:n {\l__mermap_mdfivesum_tl}
+              }
+              {
+                \__mermap_write_mdfive:n {false}
+                \msg_warning:nnx { mercatormap }{ target-resource }{ \l__mermap_definition_id_str }
+              }
+          }
+          {
+            \__mermap_write_mdfive:n {false}
+            \msg_warning:nnx { mercatormap }{ definition-production }{ \l__mermap_definition_id_str }
+          }
+      }
+      {
+        \__mermap_write_mdfive:n {false}
+        \msg_warning:nnx { mercatormap }{ shell-escape }{ \l__mermap_definition_id_str }
+      }
+  }
+
+\NewDocumentCommand \mermaplastfivesum { m }
+{
+  \tl_set:Nx \l__mermap_last_mdfivesum_tl { #1 }
+}
+
+\cs_new:Npn \__mermap_write_mdfive:n #1
+  {
+    \iow_open:Nn \l__mermap_iow {\l__mermap_definition_id_str.md5}
+    \iow_now:Nx  \l__mermap_iow {\c_backslash_str mermaplastfivesum{#1} \c_percent_str}
+    \iow_close:N \l__mermap_iow
+  }
+
+
+
+%---- map drawing --------------------------------------------------------------
+
+
+\dim_new:N \l__mermap_flex_tile_size_dim
+\dim_new:N \l__mermap_tx_dim
+\dim_new:N \l__mermap_ty_dim
+
+\int_new:N \l__mermap_tile_x_int
+\int_new:N \l__mermap_tile_xmod_int
+\int_new:N \l__mermap_tile_y_int
+
+\tl_new:N \l__mermap_current_map_tl
+\tl_new:N \l__mermap_draw_map_tl
+\tl_new:N \l__mermap_tikz_map_clip_tl
+\tl_new:N \l__mermap_tile_filename_tl
+
+
+\prg_new_conditional:Npnn \__mermap_if_inside_picture_environment: { p, TF, T }
+  {
+    \cs_if_exist:NTF \pgfpictureid
+    {
+      \prg_return_true:
+    }
+    {
+      \prg_return_false:
+    }
+  }
+
+
+
+\cs_new_nopar:Npn \__mermap_set_flex_scale:nn  #1#2
+  {
+    \fp_set:Nn \l_tmpa_fp { 1+ln(\c__mermap_mean_radius_fp/#1*cosd(#2)*pi/\l__mermap_flex_tile_size_dim)/ln(2) }
+    \keys_set:nn { mermap }{ flex~zoom=\l_tmpa_fp }
+  }
+
+\use:x
+  {
+    \cs_new_nopar:Npn \exp_not:N\__mermap_set_flex_scale:w ##1 \c_colon_str ##2 \exp_not:N \q_stop
+  }
+  {
+    \__mermap_set_flex_scale:nn {#1}{#2}
+  }
+
+\use:x
+  {
+    \cs_new_nopar:Npn \exp_not:N\__mermap_set_named_flex_scale:w ##1 \c_colon_str ##2 \exp_not:N \q_stop
+  }
+  {
+    \__mermap_set_flex_scale:nn {#1}{\mrcNPlat{#2}}
+  }
+
+
+\keys_define:nn { mermap }
+  {
+    tile~size      .dim_set:N = \l__mermap_tile_size_dim,
+    flex~tile~size .dim_set:N = \l__mermap_flex_tile_size_dim,
+    flex~zoom      .code:n =
+      {
+        \int_set:Nn \l__mermap_supply_zoom_int {\fp_to_int:n{round(#1)}}
+        \dim_set:Nn \l__mermap_tile_size_dim {\fp_to_dim:n{\l__mermap_flex_tile_size_dim*2^(#1-\l__mermap_supply_zoom_int)}}
+      },
+    flex~scale        .code:n = {\__mermap_set_flex_scale:w #1 \q_stop},
+    named~flex~scale  .code:n = {\__mermap_set_named_flex_scale:w #1 \q_stop},
+    map~clip        .tl_set:N = \l__mermap_tikz_map_clip_tl,
+    map~scope         .code:n = {\tikzset{mermap_scope_style/.style={#1}}},
+    map~path          .code:n = {\tikzset{mermap_path_style/.style={#1}}},
+    draw           .tl_set:N = \l__mermap_draw_map_tl,
+  }
+
+
+\keys_set:nn { mermap }
+  {
+    tile~size      = 32.512mm,
+    flex~tile~size = 32.512mm,
+    map~clip=\mrcclipmap,
+    draw=auto,
+    map~scope=,
+    map~path={upper~left=green!50, upper~right=green!25,
+      lower~left=green!50!black!50, lower~right=green!25},
+  }
+
+
+\NewDocumentCommand \mrcclipmap {}
+  {\path[clip] (mrcmap.south~west) rectangle (mrcmap.north~east);}
+
+\NewDocumentCommand \mrcboundmap {}
+  {\path[use~as~bounding~box] (mrcmap.south~west) rectangle (mrcmap.north~east);}
+
+
+\cs_new_nopar:Npn \__mermap_drawmap_path:
+  {
+    \begin{scope}[
+      xshift=\fp_to_dim:n{ (0.5-\l__mermap_tile_westoffset_fp)*\l__mermap_tile_size_dim },
+      yshift=\fp_to_dim:n{ (0.5-\l__mermap_tile_southoffset_fp)*\l__mermap_tile_size_dim },
+      mermap_scope_style]
+    \tl_use:N \l__mermap_tikz_map_clip_tl
+    \path[mermap_path_style] (mrcmap.south~west) rectangle (mrcmap.north~east);
+    \end{scope}
+  }
+
+
+\cs_new_nopar:Npn \__mermap_drawtile:
+  {
+    \tl_set:Nx \l__mermap_tile_filename_tl
+      {
+        \exp_not:o\l__mermap_tile_basename_tl
+        _\int_use:N\l__mermap_tile_zoom_int
+        _\int_use:N\l__mermap_tile_xmod_int
+        _\int_use:N\l__mermap_tile_y_int
+        .png
+      }
+    \file_if_exist:nTF \l__mermap_tile_filename_tl
+      {
+        \node[line~width=0mm,inner~sep=0mm,outer~sep=0mm,draw=none,fill=none,rectangle]
+          at (\l__mermap_tx_dim,\l__mermap_ty_dim)
+          {\includegraphics[width=\l__mermap_tile_size_dim]{\l__mermap_tile_filename_tl}};
+      }
+      {
+        \path[mermap_path_style] (\l__mermap_tx_dim,\l__mermap_ty_dim)
+          ++(-\l__mermap_tile_size_dim/2,-\l__mermap_tile_size_dim/2)
+          rectangle +(\l__mermap_tile_size_dim,\l__mermap_tile_size_dim);
+      }
+  }
+
+
+\cs_new_nopar:Npn \__mermap_drawmap_tiles:
+  {
+    \begin{scope}[
+      xshift=\fp_to_dim:n{ (0.5-\l__mermap_tile_westoffset_fp)*\l__mermap_tile_size_dim },
+      yshift=\fp_to_dim:n{ (0.5-\l__mermap_tile_southoffset_fp)*\l__mermap_tile_size_dim },
+      mermap_scope_style]
+    \tl_use:N \l__mermap_tikz_map_clip_tl
+    \int_set_eq:NN \l__mermap_tile_x_int \l__mermap_tile_xmin_int
+    \dim_set:Nn \l__mermap_tx_dim {0pt}
+    \int_until_do:nNnn  \l__mermap_tile_x_int > \l__mermap_tile_xmax_int
+      {
+        \dim_set:Nn \l__mermap_ty_dim {0pt}
+        \int_set:Nn \l__mermap_tile_xmod_int {\int_mod:nn{\l__mermap_tile_x_int}{\l__mermap_tile_number_int}}
+        \int_compare:nNnT \l__mermap_tile_xmod_int < 0
+          {
+            \int_add:Nn \l__mermap_tile_xmod_int \l__mermap_tile_number_int
+          }
+        \int_set_eq:NN \l__mermap_tile_y_int \l__mermap_tile_ymax_int
+        \int_until_do:nNnn  \l__mermap_tile_y_int < \l__mermap_tile_ymin_int
+        {
+          \int_compare:nNnF \l__mermap_tile_y_int < 0
+            {
+              \int_compare:nNnT \l__mermap_tile_y_int < \l__mermap_tile_number_int
+              {
+                \__mermap_drawtile:
+              }
+            }
+          \dim_add:Nn \l__mermap_ty_dim \l__mermap_tile_size_dim
+          \int_decr:N \l__mermap_tile_y_int
+        }
+        \dim_add:Nn \l__mermap_tx_dim \l__mermap_tile_size_dim
+        \int_incr:N \l__mermap_tile_x_int
+      }
+    \end{scope}
+  }
+
+
+\cs_new_nopar:Npn \__mermap_drawsinglemap:
+  {
+    \begin{scope}[mermap_scope_style]
+    \tl_use:N \l__mermap_tikz_map_clip_tl
+    \node[above~right,line~width=0mm,inner~sep=0mm,outer~sep=0mm,draw=none,fill=none,rectangle] at (0,0)
+      {\includegraphics[width=\mrctexwidth,height=\mrctexheight]{\l__mermap_definition_id_str.png}};
+    \end{scope}
+  }
+
+
+\cs_new_nopar:Npn \__mermap_drawmap_mergedmap:
+  {
+    \str_if_eq:VnTF \l__mermap_tile_resource_tl {mergedmap}
+      {
+        \__mermap_drawsinglemap:
+      }
+      {
+        \__mermap_drawmap_path:
+      }
+  }
+
+
+\cs_new_nopar:Npn \__mermap_drawmap_wmsmap:
+  {
+    \str_if_eq:VnTF \l__mermap_tile_resource_tl {wmsmap}
+      {
+        \__mermap_drawsinglemap:
+      }
+      {
+        \__mermap_drawmap_path:
+      }
+  }
+
+
+\msg_new:nnn{ mercatormap }{ draw-auto }
+  { 'draw=auto' -> 'draw=#1'~is~undefined. }
+
+
+\cs_new_nopar:Npn \__mermap_drawmap_auto:
+  {
+    \cs_if_exist:cTF {__mermap_drawmap_\l__mermap_tile_resource_tl :}
+      {
+        \use:c {__mermap_drawmap_\l__mermap_tile_resource_tl :}
+      }
+      {
+        \str_if_eq:VnTF \l__mermap_tile_resource_tl {none}
+          {
+            \__mermap_drawmap_path:
+          }
+          {
+            \msg_warning:nnx { mercatormap }{ draw-undefined }{ \tl_use:N \l__mermap_tile_resource_tl }
+          }
+      }
+  }
+
+
+\msg_new:nnnn{ mercatormap }{ draw-undefined }
+  { 'draw=#1'~is~undefined. }
+  {
+    The~option~value~'#1'~is~not~known~for~'draw':
+    perhaps~it~is~spelled~incorrectly.
+  }
+
+\NewDocumentCommand \mrcdrawmap { o }
+  {
+    \group_begin:
+    \IfNoValueF {#1}
+      { \keys_set:nn { mermap } {#1} }
+    \cs_if_exist:cTF {__mermap_drawmap_\l__mermap_draw_map_tl :}
+      {
+        \use:c {__mermap_drawmap_\l__mermap_draw_map_tl :}
+      }
+      {
+        \msg_warning:nnx { mercatormap }{ draw-undefined }{ \tl_use:N \l__mermap_draw_map_tl }
+      }
+    \group_end:
+  }
+
+
+\cs_new_nopar:Npn \__mermap_applymap:
+  {
+    \file_input:n {\l__mermap_definition_id_str.def}
+  }
+
+
+\NewDocumentCommand \mrcapplymap { m }
+  {
+    \__mermap_create_definition_id:n {#1}
+    \__mermap_applymap:
+  }
+
+
+\cs_new_nopar:Npn \__mermap_drawinfo:
+  {
+    \begin{scope}[every~node/.style={fill=white,fill~opacity=0.8,text~opacity=1,font=\sffamily\footnotesize}]
+    \mrcclipmap
+    \tl_set:Nn \l__mermap_tile_basename_tl {_dummy_}% not existing file
+    \mermapset{map~path={draw=white,double=red}}
+    \tikzset{mermap_path_style/.style={draw=white,double=red}}
+    \__mermap_drawmap_tiles:
+    \node at (mrcmap.center) {
+      \begin{tabular}{ll}
+      scale      & ca.~\mrcprettymapscale\\
+      resolution & ca.~\mrcprettymapresolution\\
+      \TeX\nobreakspace tile~size  & ca.~\mrcprettytilesize\\
+      width      & ca.~\mrcprettymapwidth\\
+      height     & ca.~\mrcprettymapheight\\
+      zoom       & $z=\int_use:N \l__mermap_tile_zoom_int$\\
+      horizontal & $x\in\{\int_use:N\l__mermap_tile_xmin_int,\ldots,\int_use:N\l__mermap_tile_xmax_int\}$\\
+      vertical   & $y\in\{\int_use:N\l__mermap_tile_ymin_int,\ldots,\int_use:N\l__mermap_tile_ymax_int\}$
+      \end{tabular}
+    };
+    \node[above] at (mrcmap.south) {
+      \mrcformlat[format~angle=decimal-4]{\mrcmapsouth},
+      \SI[round-mode=figures,round-precision=6,detect-all]{\fp_to_decimal:n{
+        \c__mermap_scale_radius_fp*(\mrcmapeast-\mrcmapwest)*cosd(\mrcmapsouth)}}{km}
+    };
+    \node[below] at (mrcmap.north) {
+      \mrcformlat[format~angle=decimal-4]{\mrcmapnorth},
+      \SI[round-mode=figures,round-precision=6,detect-all]{\fp_to_decimal:n{
+        \c__mermap_scale_radius_fp*(\mrcmapeast-\mrcmapwest)*cosd(\mrcmapnorth)}}{km}
+    };
+    \node[rotate=90] at ([xshift=3mm]mrcmap.west) {
+      \mrcformlon[format~angle=decimal-4]{\mrcmapwest},
+      \SI[round-mode=figures,round-precision=6,detect-all]{\fp_to_decimal:n{
+        \c__mermap_scale_radius_fp*(\mrcmapnorth-\mrcmapsouth)}}{km}
+    };
+    \node[rotate=90] at ([xshift=-3mm]mrcmap.east) {
+      \mrcformlon[format~angle=decimal-4]{\mrcmapeast},
+      \SI[round-mode=figures,round-precision=6,detect-all]{\fp_to_decimal:n{
+        \c__mermap_scale_radius_fp*(\mrcmapnorth-\mrcmapsouth)}}{km}
+    };
+    \end{scope}%
+  }
+
+\NewDocumentCommand{\mrcdrawinfo}{ }{ \__mermap_drawinfo: }
+
+
+%---- geodetic network ---------------------------------------------------------
+
+
+\dim_new:N \l__mermap_network_distance_dim
+\int_new:N \l__mermap_network_pieces_int
+\tl_new:N  \l__mermap_network_font_tl
+
+\keys_define:nn { mermap }
+  {
+    network~distance .dim_set:N = \l__mermap_network_distance_dim,
+    network~pieces   .int_set:N = \l__mermap_network_pieces_int,
+    network~font     .tl_set:N  = \l__mermap_network_font_tl,
+  }
+
+\keys_set:nn { mermap }
+  {
+    network~pieces   = 8,
+    network~distance = 2cm,
+    network~font     = \fontsize{4pt}{4pt}\sffamily,
+  }
+
+\cs_new_nopar:Npn \__mermap_compute_network_step:nn #1#2
+  {
+    \fp_set:Nn \l_tmpa_fp
+    {
+      min ( \l__mermap_network_pieces_int, round((#1)/\l__mermap_network_distance_dim) )
+    }
+    \fp_set:Nn \l_tmpb_fp { (#2)/\l_tmpa_fp }
+    \fp_set:Nn \l_tmpa_fp { floor(ln(\l_tmpb_fp)/ln(10)) }
+    \fp_compare:nNnTF {\l_tmpa_fp} < {0}
+      {
+        \fp_compare:nNnTF {\l_tmpa_fp} > {-5}
+          {
+            \use:x
+            {
+              \exp_not:N\keys_set:nn { mermap }{ format~angle=decimal\fp_to_int:N\l_tmpa_fp}
+            }
+          }
+          {
+            \keys_set:nn { mermap }{ format~angle=decimal }
+          }
+      }
+      {
+        \keys_set:nn { mermap }{ format~angle=decimal-0 }
+      }
+    \fp_set:Nn \l_tmpa_fp { 10^\l_tmpa_fp }
+    \fp_set:Nn \l_tmpb_fp { \l_tmpb_fp/\l_tmpa_fp }
+    \fp_compare:nNnTF {abs(\l_tmpb_fp-1)} < {abs(\l_tmpb_fp-2)}
+      {
+        \fp_compare:nNnTF {abs(\l_tmpb_fp-1)} < {abs(\l_tmpb_fp-5)}
+        {
+          \fp_set:Nn \l__mermap_result_fp {\l_tmpa_fp}
+        }
+        {
+          \fp_set:Nn \l__mermap_result_fp {5*\l_tmpa_fp}
+        }
+      }
+      {
+        \fp_compare:nNnTF {abs(\l_tmpb_fp-2)} < {abs(\l_tmpb_fp-5)}
+        {
+          \fp_set:Nn \l__mermap_result_fp {2*\l_tmpa_fp}
+        }
+        {
+          \fp_set:Nn \l__mermap_result_fp {5*\l_tmpa_fp}
+        }
+      }
+  }
+
+
+\NewDocumentCommand\mrcdrawnetwork { o }
+  {
+    \begin{scope}[every~node/.style={inner~sep=0.5pt,black!50!gray,
+      font=\l__mermap_network_font_tl,fill=white,opacity=0.3,text~opacity=1}]
+    \IfNoValueF {#1} { \keys_set:nn { mermap } {#1} }
+    \tl_use:N \l__mermap_tikz_map_clip_tl
+    \__mermap_compute_network_step:nn {\l__mermap_tex_height_fp}{\l__mermap_mapnorth_fp-\l__mermap_mapsouth_fp}
+    \fp_set:Nn \l_tmpa_fp { ceil(\l__mermap_mapsouth_fp/\l__mermap_result_fp)*\l__mermap_result_fp}
+    \fp_compare:nNnT {\l_tmpa_fp-\l__mermap_mapsouth_fp} < {1e-10}
+      {
+        \fp_add:Nn \l_tmpa_fp {\l__mermap_result_fp}
+      }
+    \fp_while_do:nNnn {\l_tmpa_fp} < {\l__mermap_mapnorth_fp}
+      {
+        \tl_set:Nn \l_tmpa_tl {\fp_use:N\l_tmpa_fp}
+        \draw[gray,very~thin] (mrc~cs\c_colon_str lat=\l_tmpa_tl,lon=\mrcmapwest)
+          coordinate (mermap_temp)
+          node[right=1mm,inner~sep=0.5pt,black!50!gray,font=\l__mermap_network_font_tl,
+            fill=white,opacity=0.3,text~opacity=1,
+            ]{\mrcformlat{\l_tmpa_tl}}
+          -- (mermap_temp -| mrcmap.east)
+          node[left=1mm,inner~sep=0.5pt,black!50!gray,font=\l__mermap_network_font_tl,
+            fill=white,opacity=0.3,text~opacity=1,
+          ]{\mrcformlat{\l_tmpa_tl}}
+          ;
+        \fp_add:Nn \l_tmpa_fp {\l__mermap_result_fp}
+      }
+    \__mermap_compute_network_step:nn {\l__mermap_tex_width_fp}{\l__mermap_mapeast_fp-\l__mermap_mapwest_fp}
+    \fp_set:Nn \l_tmpa_fp { ceil(\l__mermap_mapwest_fp/\l__mermap_result_fp)*\l__mermap_result_fp}
+    \fp_compare:nNnT {\l_tmpa_fp-\l__mermap_mapwest_fp} < {1e-10}
+      {
+        \fp_add:Nn \l_tmpa_fp {\l__mermap_result_fp}
+      }
+    \fp_while_do:nNnn {\l_tmpa_fp} < {\l__mermap_mapeast_fp}
+      {
+        \tl_set:Nn \l_tmpa_tl {\fp_use:N\l_tmpa_fp}
+        \draw[gray,very~thin] (mrc~cs\c_colon_str lon=\l_tmpa_tl,lat=\mrcmapsouth)
+          coordinate (mermap_temp)
+          node[above=1mm,inner~sep=0.5pt,black!50!gray,font=\l__mermap_network_font_tl,
+            fill=white,opacity=0.3,text~opacity=1,
+            ]{\mrcformlon{\l_tmpa_tl}}
+          -- (mermap_temp |- mrcmap.north)
+          node[below=1mm,inner~sep=0.5pt,black!50!gray,font=\l__mermap_network_font_tl,
+            fill=white,opacity=0.3,text~opacity=1,
+          ]{\mrcformlon{\l_tmpa_tl}}
+          ;
+        \fp_add:Nn \l_tmpa_fp {\l__mermap_result_fp}
+      }
+    \end{scope}
+  }
+
+
+%---- scaling and formatting ---------------------------------------------------
+
+\tl_new:N \l__mermap_temp_tl
+
+\keys_define:nn { mermap }
+  {
+    format~south .cs_set:Np = \__mermap_format_south:n #1,
+    format~north .cs_set:Np = \__mermap_format_north:n #1,
+    format~east .cs_set:Np  = \__mermap_format_east:n #1,
+    format~west .cs_set:Np  = \__mermap_format_west:n #1,
+    __format_angle .cs_set:Np = \__mermap_format_angle:n #1,
+    format~angle .choice:,
+    format~angle .value_required:n = true,
+    format~angle / decimal   .meta:nn = {mermap}{__format_angle=\ang{##1}},
+    format~angle / decimal-0 .meta:nn = {mermap}{__format_angle={\ang[round-mode=places,round-precision=0]{##1}}},
+    format~angle / decimal-1 .meta:nn = {mermap}{__format_angle={\ang[round-mode=places,round-precision=1]{##1}}},
+    format~angle / decimal-2 .meta:nn = {mermap}{__format_angle={\ang[round-mode=places,round-precision=2]{##1}}},
+    format~angle / decimal-3 .meta:nn = {mermap}{__format_angle={\ang[round-mode=places,round-precision=3]{##1}}},
+    format~angle / decimal-4 .meta:nn = {mermap}{__format_angle={\ang[round-mode=places,round-precision=4]{##1}}},
+    format~angle / degree    .meta:nn = {mermap}{format~angle=decimal-0},
+    format~angle / minute    .meta:nn = {mermap}{__format_angle=\__mermap_format_angle_minute:n{##1}},
+    format~angle / second    .meta:nn = {mermap}{__format_angle=\__mermap_format_angle_second:n{##1}},
+    format~NEWS~absolute .meta:nn      = {mermap}{
+      format~south = {##1}, format~north = {##1}, format~east = {##1}, format~west = {##1} },
+    format~NEWS~numeric .meta:nn      = {mermap}{
+      format~south = {$-$##1}, format~north = {##1}, format~east = {##1}, format~west = {$-$##1} },
+  }
+
+
+\keys_set:nn { mermap }
+  {
+    format~south = {#1\,S},
+    format~north = {#1\,N},
+    format~east  = {#1\,E},
+    format~west  = {#1\,W},
+    format~angle = decimal-4,
+  }
+
+
+\NewExpandableDocumentCommand{\mrckmtotex}{ m }
+  {
+    \fp_to_dim:n { (#1)/\l__mermap_scale_fp }
+  }
+
+\NewExpandableDocumentCommand{\mrcmiletotex}{ m }
+  {
+    \fp_to_dim:n { (#1)*\c__mermap_mile_fp/\l__mermap_scale_fp }
+  }
+
+\NewExpandableDocumentCommand{\mrctextokm}{ m }
+  {
+    \fp_to_decimal:n { (#1)*\l__mermap_scale_fp }
+  }
+
+\NewExpandableDocumentCommand{\mrctextomile}{ m }
+  {
+    \fp_to_decimal:n { (#1)/\c__mermap_mile_fp*\l__mermap_scale_fp }
+  }
+
+\NewDocumentCommand{\mrcprettymapscale}{ }
+  {
+    1\,\c_colon_str\,\num[round-mode=figures,round-precision=3,detect-all]{\fp_to_decimal:N \l__mermap_scale_denominator_fp}
+  }
+
+
+\cs_new_nopar:Npn \__mermap_pretty_distance:n #1
+  {
+    \fp_set:Nn \l_tmpa_fp { #1 }
+    \fp_compare:nNnTF \l_tmpa_fp < 5
+      {
+        \SI[round-mode=figures,round-precision=3,detect-all]{\fp_to_decimal:n{1000*\l_tmpa_fp}}{\meter}
+      }
+      {
+        \SI[round-mode=figures,round-precision=3,detect-all]{\fp_to_decimal:N \l_tmpa_fp}{\kilo\meter}
+      }
+  }
+
+
+\cs_new_nopar:Npn \__mermap_pretty_length:n #1
+  {
+    \fp_set:Nn \l_tmpa_fp { (#1)*\l__mermap_scale_fp }
+    \fp_compare:nNnTF \l_tmpa_fp < 5
+      {
+        \SI[round-mode=figures,round-precision=3,detect-all]{\fp_to_decimal:n{1000*\l_tmpa_fp}}{\meter}
+      }
+      {
+        \SI[round-mode=figures,round-precision=3,detect-all]{\fp_to_decimal:N \l_tmpa_fp}{\kilo\meter}
+      }
+  }
+
+
+\NewDocumentCommand{\mrcprettymapwidth}{ }
+  {
+    \__mermap_pretty_length:n {\mrctexwidth}
+  }
+
+\NewDocumentCommand{\mrcprettymapheight}{ }
+  {
+    \__mermap_pretty_length:n {\mrctexheight}
+  }
+
+\NewDocumentCommand{\mrcprettymapresolution}{ }
+  {
+    \SI[round-mode=places,round-precision=0,detect-all]{\fp_to_decimal:n{1in*\l__mermap_pixel_width_tl/\l__mermap_tex_width_fp}}{dpi}
+  }
+
+\NewDocumentCommand{\mrcprettytilesize}{ }
+  {
+    \SI[round-mode=places,round-precision=3,detect-all]{\fp_to_decimal:n{\l__mermap_tile_size_dim/1mm}}{\milli\meter}
+  }
+
+
+\cs_new_nopar:Npn \__mermap_format_angle_minute:n #1
+  {
+    \fp_set:Nn \l_tmpa_fp {floor(#1)}
+    \fp_set:Nn \l_tmpb_fp {round((#1-\l_tmpa_fp)*60)}
+    \ang[add-arc-degree-zero,add-arc-minute-zero]
+      {
+        \fp_to_int:N \l_tmpa_fp ;
+        \fp_to_int:N \l_tmpb_fp ;
+      }
+  }
+
+
+\cs_new_nopar:Npn \__mermap_format_angle_second:n #1
+  {
+    \fp_set:Nn \l_tmpa_fp {floor(#1)}
+    \fp_set:Nn \l_tmpb_fp {floor((#1-\l_tmpa_fp)*60)}
+    \ang[add-arc-degree-zero,add-arc-minute-zero]
+      {
+        \fp_to_int:N \l_tmpa_fp ;
+        \fp_to_int:N \l_tmpb_fp ;
+        \fp_to_int:n {round(((#1-\l_tmpa_fp)*60-\l_tmpb_fp)*60)}
+      }
+  }
+
+\NewDocumentCommand{\mrcformlat}{ o m }
+  {
+    \group_begin:
+    \IfNoValueF {#1}
+      { \keys_set:nn { mermap } {#1} }
+    \fp_set:Nn \l_tmpa_fp {#2}
+    \fp_compare:nNnTF \l_tmpa_fp < 0
+      {
+        \tl_set:Nx \l__mermap_temp_tl {\fp_to_decimal:n{-\l_tmpa_fp}}
+        \__mermap_format_south:n {\__mermap_format_angle:n{\l__mermap_temp_tl}}
+      }
+      {
+        \tl_set:Nx \l__mermap_temp_tl {\fp_to_decimal:N \l_tmpa_fp}
+        \__mermap_format_north:n {\__mermap_format_angle:n{\l__mermap_temp_tl}}
+      }
+    \group_end:
+  }
+
+\NewDocumentCommand{\mrcformlon}{ o m }
+  {
+    \group_begin:
+    \IfNoValueF {#1}
+      { \keys_set:nn { mermap } {#1} }
+    \fp_set:Nn \l_tmpa_fp {#2-360*floor((#2+180)/360)}
+    \fp_compare:nNnTF \l_tmpa_fp < 0
+      {
+        \tl_set:Nx \l__mermap_temp_tl {\fp_to_decimal:n{-\l_tmpa_fp}}
+        \__mermap_format_west:n{\__mermap_format_angle:n{\l__mermap_temp_tl}}
+      }
+      {
+        \tl_set:Nx \l__mermap_temp_tl {\fp_to_decimal:N \l_tmpa_fp}
+        \__mermap_format_east:n {\__mermap_format_angle:n{\l__mermap_temp_tl}}
+      }
+    \group_end:
+  }
+
+
+%---- scale bars ---------------------------------------------------------------
+
+\bool_new:N \l__mermap_scalebar_double_bool
+\bool_new:N \l__mermap_scalebar_transparent_bool
+\dim_new:N  \l__mermap_scalebar_height_dim
+\fp_new:N   \l__mermap_scalebar_width_fp
+\int_new:N  \l__mermap_scalebar_partitions_int
+\tl_new:N   \l__mermap_scalebar_position_tl
+
+
+\cs_new_nopar:Npn \__mermap_scalebar_positioning:w #1#2#3#4#5;#6;#7 \q_stop
+  {
+    \tl_if_empty:nTF {#5}
+    {
+      \fp_set:Nn \l_tmpa_fp {0}
+      \fp_set:Nn \l_tmpb_fp {0}
+    }
+    {
+      \fp_set:Nn \l_tmpa_fp {#3*(#5)}
+      \tl_if_empty:nTF {#6}
+      {
+        \fp_set:Nn \l_tmpb_fp {#4*(#5)}
+      }
+      {
+        \fp_set:Nn \l_tmpb_fp {#4*(#6)}
+      }
+    }
+    \tl_set:Nx \l__mermap_scalebar_at_tl
+      {
+        {([xshift=\fp_to_dim:N\l_tmpa_fp,yshift=\fp_to_dim:N\l_tmpb_fp]mrcmap.#1)}
+      }
+    \tl_set:Nn \l__mermap_scalebar_placement_tl {#2}
+  }
+
+\keys_define:nn { mermap/scalebar }
+  {
+    width-in-km    .fp_set:N   = \l__mermap_scalebar_width_fp,
+    width-in-kilometer .meta:nn    = { mermap/scalebar }{ width-in-km={#1} },
+    width-in-meter .meta:nn    = { mermap/scalebar }{ width-in-km={(#1)/1000} },
+    width-in-mile  .meta:nn    = { mermap/scalebar }{ width-in-km={(#1)*\c__mermap_mile_fp} },
+    width-in-yard  .meta:nn    = { mermap/scalebar }{ width-in-km={(#1)*0.0009144} },
+    partitions     .int_set:N  = \l__mermap_scalebar_partitions_int,
+    height         .dim_set:N  = \l__mermap_scalebar_height_dim,
+    at             .tl_set:N   = \l__mermap_scalebar_at_tl,
+    placement      .tl_set:N   = \l__mermap_scalebar_placement_tl,
+    major~style    .code:n     = {\tikzset{mrcscalebarmajor/.style={#1}}},
+    minor~style    .code:n     = {\tikzset{mrcscalebarminor/.style={#1}}},
+    double         .bool_set:N         = \l__mermap_scalebar_double_bool,
+    single         .bool_set_inverse:N = \l__mermap_scalebar_double_bool,
+    transparent    .bool_set:N         = \l__mermap_scalebar_transparent_bool,
+    solid          .bool_set_inverse:N = \l__mermap_scalebar_transparent_bool,
+    scale          .code:n     = {\fp_set:Nn \l__mermap_scale_fp { #1 / (1cm*100000) }},
+    south-east-inside .code:n =
+      { \__mermap_scalebar_positioning:w {south~east}{above~left}{-1}{1}#1;;\q_stop },
+    south-east-outside .code:n =
+      { \__mermap_scalebar_positioning:w {south~east}{below~left}{-1}{-1}#1;;\q_stop },
+    south-west-inside .code:n =
+      { \__mermap_scalebar_positioning:w {south~west}{above~right}{1}{1}#1;;\q_stop },
+    south-west-outside .code:n =
+      { \__mermap_scalebar_positioning:w {south~west}{below~right}{1}{-1}#1;;\q_stop },
+    north-west-inside .code:n =
+      { \__mermap_scalebar_positioning:w {north~west}{below~right}{1}{-1}#1;;\q_stop },
+    north-west-outside .code:n =
+      { \__mermap_scalebar_positioning:w {north~west}{above~right}{1}{1}#1;;\q_stop },
+    north-east-inside .code:n =
+      { \__mermap_scalebar_positioning:w {north~east}{below~left}{-1}{-1}#1;;\q_stop },
+    north-east-outside .code:n =
+      { \__mermap_scalebar_positioning:w {north~east}{above~left}{-1}{1}#1;;\q_stop },
+  }
+
+\keys_set:nn { mermap/scalebar }
+  {
+    width-in-km = 0,
+    partitions  = 5,
+    double      = true,
+    transparent = true,
+    height      = 2mm,
+    %at          = {([xshift=-10mm,yshift=5mm]mrcmap.south~east)},
+    %placement   = above~left,
+    at           = {(0,0)},
+    placement    =,
+    major~style  =,
+    minor~style  =,
+  }
+
+\cs_new_nopar:Npn \__mermap_drawscalebar:
+  {
+    \use:x
+    {
+      \exp_not:N\node[name=mrcscalebar,
+        at={\exp_not:V\l__mermap_scalebar_at_tl},
+        \exp_not:V\l__mermap_scalebar_placement_tl,
+        line~width=0mm,inner~sep=0mm,outer~sep=0mm,draw=none,fill=none,rectangle,
+        minimum~width=\mrckmtotex{\l__mermap_scalebar_width_fp},
+        minimum~height=\l__mermap_scalebar_height_dim]{};
+    }
+    \begin{scope}[shift=(mrcscalebar.south~west)]
+    \__mermap_tikz_path_begin:n { fill=black, mrcscalebarmajor }
+    \pgfseteorule
+    \fp_set:Nn \l_tmpa_fp {\l__mermap_scalebar_width_fp/\l__mermap_scale_fp} % Breite
+    \pgfpathrectangle{\pgfpoint{0pt}{0pt}}
+      {\pgfpoint{\fp_to_dim:N\l_tmpa_fp}{\l__mermap_scalebar_height_dim}}
+    \bool_if:NF \l__mermap_scalebar_transparent_bool
+      {
+        \__mermap_tikz_path_end:
+        \__mermap_tikz_path_begin:n { fill=white, mrcscalebarminor }
+        \fp_set:Nn \l_tmpa_fp {\l__mermap_scalebar_width_fp/\l__mermap_scale_fp}
+      }
+    \fp_set:Nn \l_tmpb_fp {\l_tmpa_fp/\l__mermap_scalebar_partitions_int}
+    \bool_if:NTF \l__mermap_scalebar_double_bool
+    {
+      \int_set:Nn \l_tmpa_int {1}
+      \dim_set:Nn \l_tmpb_dim {\l__mermap_scalebar_height_dim/2}
+      \dim_set:Nn \l_tmpa_dim {0.2pt-\l_tmpb_dim}
+      \int_compare:nNnTF \l__mermap_scalebar_partitions_int = 1
+        {
+          \pgfpathrectangle{\pgfpoint{0.2pt}{\l_tmpb_dim}}
+            {\pgfpoint{\fp_to_dim:n{\l_tmpb_fp-0.4pt}}{\l_tmpa_dim}}
+        }
+        {
+          \pgfpathrectangle{\pgfpoint{0.2pt}{\l_tmpb_dim}}
+            {\pgfpoint{\fp_to_dim:n{\l_tmpb_fp-0.2pt}}{\l_tmpa_dim}}
+        }
+      \int_while_do:nNnn \l_tmpa_int < \l__mermap_scalebar_partitions_int
+        {
+          \dim_set:Nn \l_tmpa_dim {-\l_tmpa_dim}
+          \int_compare:nNnTF {\l_tmpa_int+1} = \l__mermap_scalebar_partitions_int
+            {
+              \pgfpathrectangle{\pgfpoint{\fp_to_dim:n{\l_tmpa_int*\l_tmpb_fp}}{\l_tmpb_dim}}
+                {\pgfpoint{\fp_to_dim:n{\l_tmpb_fp-0.2pt}}{\l_tmpa_dim}}
+            }
+            {
+              \pgfpathrectangle{\pgfpoint{\fp_to_dim:n{\l_tmpa_int*\l_tmpb_fp}}{\l_tmpb_dim}}
+                {\pgfpoint{\fp_to_dim:N\l_tmpb_fp}{\l_tmpa_dim}}
+            }
+          \int_incr:N \l_tmpa_int
+        }
+    }
+    {
+      \int_set:Nn \l_tmpa_int {1}
+      \dim_set:Nn \l_tmpa_dim {\l__mermap_scalebar_height_dim-0.4pt}
+      \int_while_do:nNnn \l_tmpa_int < \l__mermap_scalebar_partitions_int
+        {
+          \int_compare:nNnTF {\l_tmpa_int+1} = \l__mermap_scalebar_partitions_int
+            {
+              \pgfpathrectangle{\pgfpoint{\fp_to_dim:n{\l_tmpa_int*\l_tmpb_fp}}{0.2pt}}
+                {\pgfpoint{\fp_to_dim:n{\l_tmpb_fp-0.2pt}}{\l_tmpa_dim}}
+            }
+            {
+              \pgfpathrectangle{\pgfpoint{\fp_to_dim:n{\l_tmpa_int*\l_tmpb_fp}}{0.2pt}}
+                {\pgfpoint{\fp_to_dim:N\l_tmpb_fp}{\l_tmpa_dim}}
+            }
+          \int_add:Nn \l_tmpa_int {2}
+        }
+    }
+    \__mermap_tikz_path_end:
+    \end{scope}
+  }
+
+\msg_new:nnnn{ mercatormap }{ scalebar-too-large }
+  { The~width~of~the~scale~bar~is~too~large:~#1. }
+  {
+    You~should~provide~a~smaller~value~by~using~width-in-km~or~width-in-mile.
+  }
+
+\msg_new:nnnn{ mercatormap }{ scalebar-scale-unset }
+  { The~map~scale~is~unknown. }
+  {
+    Use~\token_to_str:N \mrcdrawscalebar \ with~a~defined~map~or~set~'scale'~
+    explicitely.
+  }
+
+\NewDocumentCommand \mrcdrawscalebar { o }
+  {
+    \group_begin:
+    \IfNoValueF {#1} { \keys_set:nn { mermap/scalebar } {#1} }
+    \fp_compare:nNnT \l__mermap_scale_fp = 0
+      {
+        \msg_error:nn{ mercatormap }{ scalebar-scale-unset }
+      }
+    \fp_compare:nNnT {\l__mermap_scalebar_width_fp/\l__mermap_scale_fp} > {575cm}
+      {
+        \msg_error:nnx{ mercatormap }{ scalebar-too-large }
+        { \fp_to_dim:n{\l__mermap_scalebar_width_fp/\l__mermap_scale_fp} }
+      }
+    \__mermap_drawscalebar:
+    \group_end:
+  }
+
+%---- markers ------------------------------------------------------------------
+
+\bool_new:N \l__mermap_marker_show_bool
+
+\fp_new:N \l__mermap_marker_angle_fp
+\fp_new:N \l__mermap_marker_inner_radius_fp
+\fp_new:N \l__mermap_marker_latitude_fp
+\fp_new:N \l__mermap_marker_longitude_fp
+\fp_new:N \l__mermap_marker_radius_fp
+\fp_new:N \l__mermap_marker_shift_fp
+
+\tl_new:N \l__mermap_every_marker_first_tl
+\tl_new:N \l__mermap_every_marker_last_tl
+\tl_new:N \l__mermap_marker_alias_tl
+\tl_new:N \l__mermap_marker_category_tl
+\tl_new:N \l__mermap_marker_contents_tl
+\tl_new:N \l__mermap_marker_font_tl
+\tl_new:N \l__mermap_marker_pictocontents_tl
+\tl_new:N \l__mermap_marker_type_tl
+\tl_new:N \l__mermap_marker_uuid_tl
+
+
+\use:x
+  {
+    \cs_new_nopar:Npn \exp_not:N\__mermap_marker_position:w ##1 \c_colon_str ##2 \exp_not:N \q_stop
+  }
+  {
+    \fp_set:Nn \l__mermap_marker_latitude_fp {#1}
+    \fp_set:Nn \l__mermap_marker_longitude_fp {#2}
+  }
+
+
+\keys_define:nn { mermap/marker }
+  {
+    latitude        .fp_set:N   = \l__mermap_marker_latitude_fp,
+    lat             .fp_set:N   = \l__mermap_marker_latitude_fp,
+    longitude       .fp_set:N   = \l__mermap_marker_longitude_fp,
+    lon             .fp_set:N   = \l__mermap_marker_longitude_fp,
+    position        .code:n     = {\__mermap_marker_position:w #1 \q_stop},
+    named~position  .meta:nn    = {mermap/marker}{latitude=\mrcNPlat{#1},longitude=\mrcNPlon{#1}},
+    use~inside      .choice:    =,
+    use~inside      .value_required:n = true,
+    use~inside/map  .code:n     = { \cs_set_eq:NN \__mermap_if_marker_inside:nnTF \__mermap_if_in_map:nnTF },
+    use~inside/vicinity .code:n = { \cs_set_eq:NN \__mermap_if_marker_inside:nnTF \__mermap_if_in_vicinity:nnTF },
+    alias           .tl_set:N   = \l__mermap_marker_alias_tl,
+    contents        .tl_set:N   = \l__mermap_marker_contents_tl,
+    pictocontents   .tl_set:N   = \l__mermap_marker_pictocontents_tl,
+    % name            .meta:nn    = {mermap/marker}{contents={#1},alias={#1}},
+    uuid            .tl_set:N   = \l__mermap_marker_uuid_tl,
+    category        .tl_set:N   = \l__mermap_marker_category_tl,
+    type            .tl_set:N   = \l__mermap_marker_type_tl,
+    angle           .fp_set:N   = \l__mermap_marker_angle_fp,
+    shift           .fp_set:N   = \l__mermap_marker_shift_fp,
+    draw            .code:n     = \colorlet{mrcmarkerdraw}{#1},
+    fill            .code:n     = \colorlet{mrcmarkerfill}{#1},
+    text            .code:n     = \colorlet{mrcmarkertext}{#1},
+    font            .tl_set:N   = \l__mermap_marker_font_tl,
+    radius          .fp_set:N   = \l__mermap_marker_radius_fp,
+    inner~radius    .fp_set:N   = \l__mermap_marker_inner_radius_fp,
+    path~style      .code:n     = {\tikzset{mrcpathstyle/.style={#1}}},
+    node~style      .code:n     = {\tikzset{mrcnodestyle/.style={#1}}},
+    show           .bool_set:N         = \l__mermap_marker_show_bool,
+    hide           .bool_set_inverse:N = \l__mermap_marker_show_bool,
+    show~category  .code:n      =
+      { \str_if_eq:VnT \l__mermap_marker_category_tl {#1} {\bool_set_true:N \l__mermap_marker_show_bool} },
+    show~all~but~category  .code:n =
+      { \str_if_eq:VnF \l__mermap_marker_category_tl {#1} {\bool_set_true:N \l__mermap_marker_show_bool} },
+    hide~category  .code:n      =
+      { \str_if_eq:VnT \l__mermap_marker_category_tl {#1} {\bool_set_false:N \l__mermap_marker_show_bool} },
+    hide~all~but~category  .code:n =
+      { \str_if_eq:VnF \l__mermap_marker_category_tl {#1} {\bool_set_false:N \l__mermap_marker_show_bool} },
+    first~options  .tl_set:N = \l__mermap_every_marker_first_tl,
+    last~options   .tl_set:N = \l__mermap_every_marker_last_tl,
+    style        .choice:    =,
+    style  .value_required:n = true,
+  }
+
+
+\keys_set:nn { mermap/marker }
+  {
+    latitude   = 12,
+    longitude  = 49,
+    use~inside = map,
+    % name       = noname,
+    contents   =,
+    alias      = noname,
+    pictocontents =,
+    angle      = 90,
+    shift      = 0pt,
+    fill       = gray!20,
+    draw       = gray,
+    text       = black,
+    radius     = 3mm,
+    inner~radius = 2.25mm,
+    path~style =,
+    node~style =,
+    font       = \sffamily\small,
+    type       = classic,
+    uuid       =,
+    category   =,
+    show       = true,
+  }
+
+
+\NewExpandableDocumentCommand\mrcmarkerlatitude{}{\fp_to_decimal:N \l__mermap_marker_latitude_fp}
+\NewExpandableDocumentCommand\mrcmarkerlongitude{}{\fp_to_decimal:N \l__mermap_marker_longitude_fp}
+\NewDocumentCommand\mrcmarkercontents{}{\tl_use:N \l__mermap_marker_contents_tl}
+\NewDocumentCommand\mrcmarkerpictocontents{}{\tl_use:N \l__mermap_marker_pictocontents_tl}
+\NewExpandableDocumentCommand\mrcmarkeruuid{}{\tl_use:N \l__mermap_marker_uuid_tl}
+\NewExpandableDocumentCommand\mrcmarkercategory{}{\tl_use:N \l__mermap_marker_category_tl}
+\NewDocumentCommand\mrcmarkerfont{}{\tl_use:N \l__mermap_marker_font_tl}
+\NewExpandableDocumentCommand\mrcmarkerangle{}{\fp_to_decimal:N \l__mermap_marker_angle_fp}
+\NewExpandableDocumentCommand\mrcmarkershift{}{\fp_to_dim:N \l__mermap_marker_shift_fp}
+\NewExpandableDocumentCommand\mrcmarkerradius{}{\fp_to_dim:N \l__mermap_marker_radius_fp}
+\NewExpandableDocumentCommand\mrcmarkerinnerradius{}{\fp_to_dim:N \l__mermap_marker_inner_radius_fp}
+
+
+\NewDocumentCommand \mrcnewmarkerstyle { m +m }
+  {
+    \keys_define:nn { mermap/marker/style }
+      {
+        #1 .meta:nn = {mermap/marker}{#2}
+      }
+  }
+
+
+\msg_new:nnnn{ mercatormap }{ markertype-undefined }
+  { Marker~type~'#1'~is~unknown. }
+  {
+    I~guess~'type=#1'~for~setting~a~marker~type~contains~a~spelling~error.
+  }
+
+
+\NewDocumentCommand \mrcmarker { m }
+  {
+    \group_begin:
+    \keys_set:nV { mermap/marker } \l__mermap_every_marker_first_tl
+    \keys_set:nn { mermap/marker } { #1 }
+    \keys_set:nV { mermap/marker } \l__mermap_every_marker_last_tl
+    \__mermap_if_marker_inside:nnTF {\l__mermap_marker_latitude_fp} {\l__mermap_marker_longitude_fp}
+    {
+      \bool_if:NT \l__mermap_marker_show_bool
+      {
+        \pgfnodealias{\l__mermap_marker_alias_tl}{mrcpos}
+        \begin{scope}[shift=(mrcpos)]
+        \cs_if_exist_use:cF{__mermap_drawmarker_\l__mermap_marker_type_tl}
+          {
+            \msg_error:nnx{ mercatormap }{ markertype-undefined }{ \l__mermap_marker_type_tl }
+          }
+        \end{scope}
+      }
+    }
+    {}
+    \group_end:
+  }
+
+
+\cs_new:Npn \__mermap_new_marker_type:nn #1
+  {
+    \cs_new:cpn {__mermap_drawmarker_#1}
+  }
+
+
+\NewDocumentCommand \mrcnewmarkertype { m }
+  {
+    \__mermap_new_marker_type:nn {#1}
+  }
+
+
+\__mermap_new_marker_type:nn {classic}
+  {
+    \node[circle,fill=black,inner~sep=0pt,minimum~width=4pt,
+      pin={[text=mrcmarkertext,font=\mrcmarkerfont,
+        pin~distance=\mrcmarkerradius,
+        pin~position=\mrcmarkerangle,mrcnodestyle]\mrcmarkercontents}] {};
+  }
+
+\__mermap_new_marker_type:nn {pin}
+  {
+    \path[fill=mrcmarkerfill,draw=none,fill~opacity=0.7]
+      (0,0) -- (0.1,0.5) -- (-0.1,0.5) -- cycle;
+    \node[fill=white,draw=none,text=mrcmarkertext,
+      above,font=\mrcmarkerfont,inner~sep=0.5mm,align=center,
+      line~width=0mm,xshift=\mrcmarkershift,
+      fill~opacity=0.7,text~opacity=1,xshift=0mm,mrcnodestyle]
+      (pin_node) at (0,0.5) {\mrcmarkercontents};
+    \path[draw=mrcmarkerdraw,fill=none,line~join=round,mrcpathstyle]
+      (0,0) -- (0.1,0.5) -- (pin_node.south~east) -- (pin_node.north~east)
+      -- (pin_node.north~west) -- (pin_node.south~west)
+      -- (-0.1,0.5) [line~join=bevel] --  cycle;
+  }
+
+\__mermap_new_marker_type:nn {pinflip}
+  {
+    \path[fill=mrcmarkerfill,draw=none,fill~opacity=0.7]
+      (0,0) -- (-0.1,-0.5) -- (0.1,-0.5) -- cycle;
+    \node[fill=white,draw=none,text=mrcmarkertext,
+      below,font=\mrcmarkerfont,inner~sep=0.5mm,align=center,
+      line~width=0mm,xshift=\mrcmarkershift,
+      fill~opacity=0.7,text~opacity=1,xshift=0mm,mrcnodestyle]
+      (pin_node) at (0,-0.5) {\mrcmarkercontents};
+    \path[draw=mrcmarkerdraw,fill=none,line~join=round,mrcpathstyle]
+      (0,0) -- (-0.1,-0.5) -- (pin_node.north~west) -- (pin_node.south~west)
+      -- (pin_node.south~east) -- (pin_node.north~east)
+      -- (0.1,-0.5)  [line~join=bevel] -- cycle;
+  }
+
+
+\cs_new_nopar:Npn \__mermap_tikz_drop_path:n #1
+  {
+    \tl_set:Nn \l_tmpa_tl {\fp_to_dim:N\l__mermap_marker_radius_fp}
+    \tl_set:Nn \l_tmpb_tl {\fp_to_dim:n{\l__mermap_marker_radius_fp*0.552}}
+    \__mermap_tikz_path_begin:n
+    {
+      line~join=bevel,draw=mrcmarkerdraw,fill=mrcmarkerfill,mrcpathstyle
+    }
+    \pgfpathmoveto{\pgfpoint{0pt}{\fp_to_dim:n{-2*\l__mermap_marker_radius_fp-\l__mermap_marker_shift_fp}}}
+    \pgfpathcurveto{\pgfpoint{\l_tmpb_tl}{-\l_tmpa_tl}}{\pgfpoint{\l_tmpa_tl}{-\l_tmpb_tl}}
+      {\pgfpoint{\l_tmpa_tl}{0pt}}
+    \pgfpathcurveto{\pgfpoint{\l_tmpa_tl}{\l_tmpb_tl}}{\pgfpoint{\l_tmpb_tl}{\l_tmpa_tl}}
+      {\pgfpoint{0pt}{\l_tmpa_tl}}
+    \pgfpathcurveto{\pgfpoint{-\l_tmpb_tl}{\l_tmpa_tl}}{\pgfpoint{-\l_tmpa_tl}{\l_tmpb_tl}}
+      {\pgfpoint{-\l_tmpa_tl}{0pt}}
+    \pgfpathcurveto{\pgfpoint{-\l_tmpa_tl}{-\l_tmpb_tl}}{\pgfpoint{-\l_tmpb_tl}{-\l_tmpa_tl}}
+      {\pgfpoint{0pt}{\fp_to_dim:n{-2*\l__mermap_marker_radius_fp-\l__mermap_marker_shift_fp}}}
+    \pgfpathclose
+    #1
+    \__mermap_tikz_path_end:
+  }
+
+\cs_new_nopar:Npn \__mermap_tikz_circle_node:
+  {
+    \node[circle,inner~sep=0pt,font=\mrcmarkerfont,text=mrcmarkertext,mrcnodestyle]
+      {
+        \hbox_set:Nn \l_tmpa_box {\mrcmarkercontents}
+        \fp_compare:nNnT {\box_wd:N \l_tmpa_box} > {1.5*\l__mermap_marker_radius_fp}
+        {
+          \box_resize_to_wd_and_ht:Nnn \l_tmpa_box
+            {\fp_to_dim:n {1.5*\l__mermap_marker_radius_fp}}
+            {\box_ht:N \l_tmpa_box}
+        }
+        \box_use_drop:N \l_tmpa_box
+      };
+  }
+
+\__mermap_new_marker_type:nn {drop}
+  {
+    \begin{scope}[yshift=\fp_to_dim:n{2*\l__mermap_marker_radius_fp+\l__mermap_marker_shift_fp}]
+    \__mermap_tikz_drop_path:n {}
+    \__mermap_tikz_circle_node:
+    \end{scope}
+  }
+
+\__mermap_new_marker_type:nn {pictodrop}
+  {
+    \begin{scope}[yshift=\fp_to_dim:n{2*\l__mermap_marker_radius_fp+\l__mermap_marker_shift_fp}]
+    \__mermap_tikz_drop_path:n {}
+    \tl_use:N \l__mermap_marker_pictocontents_tl
+    \end{scope}
+  }
+
+\__mermap_new_marker_type:nn {pictodropring}
+  {
+    \begin{scope}[yshift=\fp_to_dim:n{2*\l__mermap_marker_radius_fp+\l__mermap_marker_shift_fp}]
+    \group_begin:
+    \pgfseteorule
+    \__mermap_tikz_drop_path:n {
+        \pgfpathcircle{\pgfpoint{0pt}{0pt}}{\fp_to_dim:N\l__mermap_marker_inner_radius_fp}
+      }
+    \group_end:
+    \tl_use:N \l__mermap_marker_pictocontents_tl
+    \end{scope}
+  }
+
+\__mermap_new_marker_type:nn {knob}
+  {
+    \path[draw=mrcmarkerdraw,fill=mrcmarkerfill,mrcpathstyle]
+      circle (\fp_to_dim:N\l__mermap_marker_radius_fp);
+    \__mermap_tikz_circle_node:
+  }
+
+\__mermap_new_marker_type:nn {pictoknob}
+  {
+    \path[draw=mrcmarkerdraw,fill=mrcmarkerfill,mrcpathstyle]
+      circle (\fp_to_dim:N\l__mermap_marker_radius_fp);
+    \tl_use:N \l__mermap_marker_pictocontents_tl
+  }
+
+\__mermap_new_marker_type:nn {pictoknobring}
+  {
+    \path[draw=mrcmarkerdraw,fill=mrcmarkerfill,mrcpathstyle,even~odd~rule]
+      circle (\fp_to_dim:N\l__mermap_marker_radius_fp)
+      circle (\fp_to_dim:N\l__mermap_marker_inner_radius_fp);
+    \tl_use:N \l__mermap_marker_pictocontents_tl
+  }
+
+\__mermap_new_marker_type:nn {ringx}
+  {
+    \tl_set:Nn \l_tmpa_tl {\fp_to_dim:N\l__mermap_marker_radius_fp}
+    \path[draw=mrcmarkerdraw,very~thin]
+       (45 \c_colon_str \l_tmpa_tl)--(225\c_colon_str \l_tmpa_tl)
+       (135\c_colon_str \l_tmpa_tl)--(315\c_colon_str \l_tmpa_tl);
+    \path[draw=mrcmarkerdraw,fill=mrcmarkerfill,mrcpathstyle,even~odd~rule]
+      circle (\l_tmpa_tl) circle (\fp_to_dim:N\l__mermap_marker_inner_radius_fp);
+  }
+
+\__mermap_new_marker_type:nn {markx}
+  {
+    \tl_set:Nn \l_tmpa_tl {\fp_to_dim:N\l__mermap_marker_radius_fp}
+    \path[line~join=bevel,draw=mrcmarkerdraw,fill=mrcmarkerfill,mrcpathstyle]
+       (0,0) -- (35 \c_colon_str \l_tmpa_tl) -- (55 \c_colon_str \l_tmpa_tl) -- cycle
+       (0,0) -- (125 \c_colon_str \l_tmpa_tl) -- (145 \c_colon_str \l_tmpa_tl) -- cycle
+       (0,0) -- (215 \c_colon_str \l_tmpa_tl) -- (235 \c_colon_str \l_tmpa_tl) -- cycle
+       (0,0) -- (305 \c_colon_str \l_tmpa_tl) -- (325 \c_colon_str \l_tmpa_tl) -- cycle;
+  }
+
+
+%---- paths and routes ---------------------------------------------------------
+
+
+\bool_new:N \l__mermap_path_first_point_bool
+
+
+\keys_define:nn { mermap }
+  {
+    every~route .code:n = { \tikzset{ mermap_every_route/.style={#1} } }
+  }
+
+\keys_set:nn { mermap }
+  {
+    every~route =,
+  }
+
+
+\cs_new:Npn \__mermap_tikz_path_begin:n #1
+  {
+    \path[#1] \pgfextra
+  }
+
+\cs_new:Npn \__mermap_tikz_path_end:
+  {
+    \endpgfextra;
+  }
+
+\cs_new_nopar:Npn \__mermap_pgf_moveto_point:nn #1#2
+  {
+    \pgfpathmoveto{\__mermap_pgfpoint:nn {#1}{#2}}
+  }
+
+\cs_new_nopar:Npn \__mermap_pgf_lineto_point:nn #1#2
+  {
+    \pgfpathlineto{\__mermap_pgfpoint:nn {#1}{#2}}
+  }
+
+\cs_new_nopar:Npn \__mermap_route_point #1#2
+  {
+    \bool_if:NTF \l__mermap_path_first_point_bool
+    {
+      \__mermap_pgf_moveto_point:nn {#1}{#2}
+      \bool_set_false:N \l__mermap_path_first_point_bool
+    }
+    {
+      \__mermap_pgf_lineto_point:nn {#1}{#2}
+    }
+  }
+
+\cs_new_nopar:Npn \__mermap_route_begin:n #1
+  {
+    \__mermap_tikz_path_begin:n
+      {
+        draw,mermap_every_route,#1
+      }
+    \cs_set_eq:NN \mrcpoint \__mermap_route_point
+    \bool_set_true:N \l__mermap_path_first_point_bool
+  }
+
+\NewDocumentEnvironment {mrcroute} { O{} }
+  {
+    \__mermap_route_begin:n {#1}
+  }
+  {
+    \__mermap_tikz_path_end:
+  }
+
+\NewDocumentEnvironment {mrcroute*} { O{} }
+  {
+    \__mermap_route_begin:n {#1}
+  }
+  {
+    \pgfpathclose
+    \__mermap_tikz_path_end:
+  }
+
+\NewDocumentCommand \mrcrouteinput { s O{} m }
+  {
+    \__mermap_route_begin:n {#2}
+    \file_input:n {#3}
+    \IfBooleanT {#1}
+    {
+      \pgfpathclose
+    }
+    \__mermap_tikz_path_end:
+  }
+
+
+%---- orthodromes and loxodromes -----------------------------------------------
+
+
+\fp_new:N \l__mermap_a_x_fp
+\fp_new:N \l__mermap_a_y_fp
+\fp_new:N \l__mermap_a_z_fp
+\fp_new:N \l__mermap_b_x_fp
+\fp_new:N \l__mermap_b_y_fp
+\fp_new:N \l__mermap_b_z_fp
+\fp_new:N \l__mermap_delta_lambda_fp
+\fp_new:N \l__mermap_delta_phi_fp
+\fp_new:N \l__mermap_psi_fp
+\fp_new:N \l__mermap_t_x_fp
+\fp_new:N \l__mermap_t_y_fp
+\fp_new:N \l__mermap_t_z_fp
+
+\int_new:N \l__mermap_samples_int
+
+\keys_define:nn { mermap }
+  {
+    samples .int_set:N = \l__mermap_samples_int,
+  }
+
+\keys_set:nn { mermap }
+  {
+    samples = 100,
+  }
+
+\tikzset{
+  mermap~samples/.code={\mermapset{samples=#1}}
+}
+
+
+\cs_new_nopar:Npn \__mermap_sphere_point:nnn #1#2#3  %  {x}{y}{z}
+  {
+    \fp_set:Nn \l__mermap_cs_lat_fp { asind(#3/sqrt((#1)^2+(#2)^2+(#3)^2)) }
+    \fp_set:Nn \l__mermap_cs_lon_fp { sign(#2)*acosd(#1/sqrt((#1)^2+(#2)^2)) }
+    \__mermap_pgfpoint:nn {\l__mermap_cs_lat_fp}{\l__mermap_cs_lon_fp}
+  }
+
+
+\cs_new_nopar:Npn \__mermap_unit_sphere_point:nnn #1#2#3  %  {x}{y}{z} radius 1
+  {
+    \fp_set:Nn \l__mermap_cs_lat_fp { asind(#3) }
+    \fp_set:Nn \l__mermap_cs_lon_fp { sign(#2)*acosd(#1/sqrt((#1)^2+(#2)^2)) }
+    \__mermap_pgfpoint:nn {\l__mermap_cs_lat_fp}{\l__mermap_cs_lon_fp}
+  }
+
+
+\cs_new:Npn \__mermap_draw_orthodrome:nnnnn #1#2#3#4#5
+  {
+    \__mermap_tikz_path_begin:n { draw,mermap_every_route,#1 }
+    \fp_set:Nn \l__mermap_a_x_fp { cosd(#3)*cosd(#2) }
+    \fp_set:Nn \l__mermap_a_y_fp { sind(#3)*cosd(#2) }
+    \fp_set:Nn \l__mermap_a_z_fp { sind(#2) }
+    \fp_set:Nn \l__mermap_b_x_fp { cosd(#5)*cosd(#4) }
+    \fp_set:Nn \l__mermap_b_y_fp { sind(#5)*cosd(#4) }
+    \fp_set:Nn \l__mermap_b_z_fp { sind(#4) }
+
+    \fp_set:Nn \l_tmpa_fp { sind(#2)*sind(#4) + cosd(#2)*cosd(#4)*cosd(#5-(#3)) }
+    \fp_set:Nn \l__mermap_psi_fp { acosd(\l_tmpa_fp) }
+    \fp_set:Nn \l_tmpb_fp { sind(\l__mermap_psi_fp) }
+
+    \fp_set:Nn \l__mermap_b_x_fp { (\l__mermap_b_x_fp - \l_tmpa_fp*\l__mermap_a_x_fp)/\l_tmpb_fp }
+    \fp_set:Nn \l__mermap_b_y_fp { (\l__mermap_b_y_fp - \l_tmpa_fp*\l__mermap_a_y_fp)/\l_tmpb_fp }
+    \fp_set:Nn \l__mermap_b_z_fp { (\l__mermap_b_z_fp - \l_tmpa_fp*\l__mermap_a_z_fp)/\l_tmpb_fp }
+
+    \__mermap_pgf_moveto_point:nn {#2}{#3}
+    \int_set:Nn \l_tmpa_int {1}
+    \int_until_do:nNnn \l_tmpa_int > \l__mermap_samples_int
+      {
+        \fp_set:Nn \l_tmpa_fp { \l__mermap_psi_fp*\l_tmpa_int/\l__mermap_samples_int }
+        \fp_set:Nn \l_tmpb_fp { sind(\l_tmpa_fp) }
+        \fp_set:Nn \l_tmpa_fp { cosd(\l_tmpa_fp) }
+        \fp_set:Nn \l__mermap_t_x_fp { \l_tmpa_fp*\l__mermap_a_x_fp + \l_tmpb_fp*\l__mermap_b_x_fp }
+        \fp_set:Nn \l__mermap_t_y_fp { \l_tmpa_fp*\l__mermap_a_y_fp + \l_tmpb_fp*\l__mermap_b_y_fp }
+        \fp_set:Nn \l__mermap_t_z_fp { \l_tmpa_fp*\l__mermap_a_z_fp + \l_tmpb_fp*\l__mermap_b_z_fp }
+        \pgfpathlineto{\__mermap_unit_sphere_point:nnn {\l__mermap_t_x_fp}{\l__mermap_t_y_fp}{\l__mermap_t_z_fp}}
+        \int_incr:N \l_tmpa_int
+      }
+    \__mermap_tikz_path_end:
+  }
+
+
+\NewDocumentCommand \mrcdraworthodrome { O{} mmmm }
+  {
+    \__mermap_draw_orthodrome:nnnnn {#1}{#2}{#3}{#4}{#5}
+  }
+
+
+\NewDocumentCommand \mrcNPdraworthodrome { O{} mm }
+  {
+    \__mermap_draw_orthodrome:nnnnn {#1}{\mrcNPlat{#2}}{\mrcNPlon{#2}}{\mrcNPlat{#3}}{\mrcNPlon{#3}}
+  }
+
+
+\cs_new_nopar:Npn \__mermap_ortho_distance:nnnn #1#2#3#4
+  {
+    \fp_set:Nn \l__mermap_result_fp
+    {
+      \c__mermap_scale_radius_fp *
+      acosd( sind(#1)*sind(#3) + cosd(#1)*cosd(#3)*cosd(#4-(#2)) )
+    }
+  }
+
+
+\NewDocumentCommand \mrcstoreorthodistance { mmmmm }
+  {
+    \__mermap_ortho_distance:nnnn {#2}{#3}{#4}{#5}
+    \cs_set_nopar:Npx #1 { \fp_to_decimal:N \l__mermap_result_fp }
+  }
+
+
+\NewDocumentCommand \mrcprettyorthodistance { mmmm }
+  {
+    \__mermap_ortho_distance:nnnn {#1}{#2}{#3}{#4}
+    \__mermap_pretty_distance:n { \l__mermap_result_fp }
+  }
+
+\NewDocumentCommand \mrcNPprettyorthodistance { mm }
+  {
+    \__mermap_ortho_distance:nnnn {\mrcNPlat{#1}}{\mrcNPlon{#1}}{\mrcNPlat{#2}}{\mrcNPlon{#2}}
+    \__mermap_pretty_distance:n { \l__mermap_result_fp }
+  }
+
+
+\cs_new_nopar:Npn \__mermap_loxo_distance:nnnn #1#2#3#4
+  {
+    \fp_set:Nn \l__mermap_delta_phi_fp {(#3-(#1))/180*pi}
+    \fp_set:Nn \l__mermap_delta_lambda_fp {(#4-(#2))/180*pi}
+    \fp_compare:nNnTF {abs(\l__mermap_delta_phi_fp)} < {1e-5}
+      {
+        \fp_set:Nn \l_tmpa_fp { tand(#1) }
+        \fp_set:Nn \l_tmpb_fp { \l__mermap_delta_lambda_fp*cosd(#1)
+          /( 1 + (\l_tmpa_fp + (1+2*\l_tmpa_fp*\l_tmpa_fp)*\l__mermap_delta_phi_fp/3)*\l__mermap_delta_phi_fp/2 ) }
+        \fp_set:Nn \l__mermap_result_fp {
+          sqrt( \l__mermap_delta_phi_fp*\l__mermap_delta_phi_fp + \l_tmpb_fp*\l_tmpb_fp ) }
+      }
+      {
+        \fp_set:Nn \l__mermap_result_fp { abs(\l__mermap_delta_phi_fp)
+          *sqrt( 1+ (\l__mermap_delta_lambda_fp/( ln(tand(#3/2+45)) - ln(tand(#1/2+45)) ) )^2 ) }
+      }
+    \fp_set:Nn \l__mermap_result_fp { \c__mermap_scale_radius_fp*180/pi * \l__mermap_result_fp }
+  }
+
+
+\NewDocumentCommand \mrcstoreloxodistance { mmmmm }
+  {
+    \__mermap_loxo_distance:nnnn {#2}{#3}{#4}{#5}
+    \cs_set_nopar:Npx #1 { \fp_to_decimal:N \l__mermap_result_fp }
+  }
+
+
+\NewDocumentCommand \mrcprettyloxodistance { mmmm }
+  {
+    \__mermap_loxo_distance:nnnn {#1}{#2}{#3}{#4}
+    \__mermap_pretty_distance:n { \l__mermap_result_fp }
+  }
+
+
+\NewDocumentCommand \mrcNPprettyloxodistance { mm }
+  {
+    \__mermap_loxo_distance:nnnn {\mrcNPlat{#1}}{\mrcNPlon{#1}}{\mrcNPlat{#2}}{\mrcNPlon{#2}}
+    \__mermap_pretty_distance:n { \l__mermap_result_fp }
+  }
+
+
+
+%---- supplier -----------------------------------------------------------------
+
+\file_input:n { \mrcpkgprefix mercatorsupplier.def }
diff --git a/Master/texmf-dist/tex/latex/mercatormap/mercatorpy.def b/Master/texmf-dist/tex/latex/mercatormap/mercatorpy.def
new file mode 100644
index 00000000000..fe608f47b49
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/mercatormap/mercatorpy.def
@@ -0,0 +1,535 @@
+\begin{filecontents*}[overwrite]{maptiles.texpy}
+"""
+The LaTeX package mercatormap - version 1.00 (2020/04/20)
+maptiles.texpy: Python script for map tile download
+
+-------------------------------------------------------------------------------------------
+Copyright (c) 2020 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+-------------------------------------------------------------------------------------------
+
+This work may be distributed and/or modified under the
+conditions of the LaTeX Project Public License, either version 1.3
+of this license or (at your option) any later version.
+The latest version of this license is in
+  http://www.latex-project.org/lppl.txt
+and version 1.3 or later is part of all distributions of LaTeX
+version 2005/12/01 or later.
+
+This work has the LPPL maintenance status `author-maintained'.
+
+This work consists of all files listed in README
+"""
+
+import argparse
+import math
+import os
+import requests
+from pathlib import Path
+from PIL import Image
+
+
+packageversion = '1.00 (2020/04/20)'
+
+
+def gd(x):
+    return math.atan(math.sinh(x))
+
+
+def arggd(x):
+    return math.asinh(math.tan(x))
+
+
+def rad2planar(lon_rad, lat_rad):
+    x = 0.5*lon_rad/math.pi + 0.5
+    y = 0.5*arggd(lat_rad)/math.pi + 0.5
+    return (x, y)
+
+
+def deg2planar(lon_deg, lat_deg):
+    return rad2planar(math.radians(lon_deg), math.radians(lat_deg))
+
+
+def planar2rad(x, y):
+    lon_rad = math.pi*(2*x-1)
+    lat_rad = gd(math.pi*(2*y-1))
+    return (lon_rad, lat_rad)
+
+
+def planar2deg(x, y):
+    (lon_rad, lat_rad) = planar2rad(x, y)
+    return (math.degrees(lon_rad), math.degrees(lat_rad))
+
+
+def download(session, url, filename, overwrite=False):
+    local_file = Path(filename)
+    if local_file.is_file() and not overwrite:
+        return
+    print(url+' -> '+filename)
+    r = session.get(url)
+    r.raise_for_status()
+    with open(filename, 'wb') as handler:
+        handler.write(r.content)
+    return
+
+
+def makeparentdirs(afile):
+    directory = Path(os.path.abspath(afile)).parent
+    if not directory.is_dir():
+        os.makedirs(directory)
+
+
+class MapDefinition(object):
+    def __init__(self, args, west, east, north, south, zoom, x_1, y_1, x_2, y_2,
+                    width, height, west_offset, north_offset, south_offset):
+        self.west  = west
+        self.east  = east
+        self.north = north
+        self.south = south
+        self.zoom  = zoom
+        self.x_1   = x_1
+        self.y_1   = y_1
+        self.x_2   = x_2
+        self.y_2   = y_2
+        self.width = width
+        self.height= height
+        self.west_offset  = west_offset
+        self.north_offset = north_offset
+        self.south_offset = south_offset
+        self.n = 2 ** self.zoom
+        self.local_file_prefix = 'tiles/tile_'
+        self.attribution = args.attribution
+        self.attributionprint = args.attributionprint
+        self.pixel = args.pixel
+        self.pixel_width  = round(self.width*self.pixel)
+        self.pixel_height = round(self.height*self.pixel)
+        self.tilesize = args.tilesize
+
+
+    @classmethod
+    def construct_from_boundaries_rad(cls, args, zoom, west_rad, east_rad, north_rad, south_rad):
+        if zoom<0:
+            zoom = 0
+        if west_rad>=east_rad:
+            east_rad += 2*math.pi*math.ceil(0.5*(west_rad-east_rad)/math.pi+1e-10)
+        max_lat = gd(math.pi)-1e-10
+        if north_rad<south_rad:
+            (north_rad, south_rad) = (south_rad, north_rad)
+        if north_rad > max_lat:
+            north_rad = max_lat
+        if south_rad < -max_lat:
+            south_rad = -max_lat
+        P  = 2**(zoom-1)/math.pi
+        a1 = (west_rad+math.pi)*P
+        b1 = (math.pi-arggd(north_rad))*P
+        a2 = (east_rad+math.pi)*P
+        b2 = (math.pi-arggd(south_rad))*P
+        x1 = math.floor(a1)
+        y1 = math.floor(b1)
+        x2 = math.ceil(a2)-1
+        y2 = math.ceil(b2)-1
+        width        = a2-a1
+        height       = b2-b1
+        west_offset  = a1-x1
+        north_offset = b1-y1
+        south_offset = y2-b2+1
+        return cls(args, west_rad, east_rad, north_rad, south_rad, zoom, x1, y1, x2, y2,
+            width, height, west_offset, north_offset, south_offset )
+
+
+    @classmethod
+    def construct_from_boundaries_deg(cls, args, zoom, west_deg, east_deg, north_deg, south_deg):
+        return cls.construct_from_boundaries_rad(args,
+                zoom,math.radians(west_deg),math.radians(east_deg),
+                math.radians(north_deg),math.radians(south_deg))
+
+
+    @classmethod
+    def construct_from_boundaries_args(cls, args):
+        return cls.construct_from_boundaries_rad(args,
+                args.zoom,math.radians(args.west),math.radians(args.east),math.radians(args.north),math.radians(args.south))
+
+
+    @classmethod
+    def construct_from_reference_rad(cls, args, zoom, width, height,
+                                     ref_lon_rad, ref_lat_rad, xalign, yalign):
+        if zoom<0:
+            zoom = 0
+        P  = 2**(zoom-1)/math.pi
+        ac = (ref_lon_rad+math.pi)*P
+        bc = (math.pi-arggd(ref_lat_rad))*P
+        a1 = ac - (1+xalign)/2*width
+        a2 = a1 + width
+        b1 = bc - (1+yalign)/2*height
+        b2 = b1 + height
+        west_rad  = a1/P - math.pi
+        north_rad = gd(math.pi-b1/P)
+        east_rad  = a2/P - math.pi
+        south_rad = gd(math.pi-b2/P)
+        x1 = math.floor(a1)
+        y1 = math.floor(b1)
+        x2 = math.ceil(a2)-1
+        y2 = math.ceil(b2)-1
+        west_offset  = a1-x1
+        north_offset = b1-y1
+        south_offset = y2-b2+1
+        return cls(args, west_rad, east_rad, north_rad, south_rad, zoom, x1, y1, x2, y2,
+                    width, height, west_offset, north_offset, south_offset )
+
+
+    @classmethod
+    def construct_from_reference_deg(cls, args, zoom, width, height,
+                                     ref_lon_deg, ref_lat_deg, xalign, yalign):
+        return cls.construct_from_center_rad(args, zoom, width, height,
+           math.radians(ref_lon_deg), math.radians(ref_lat_deg), xalign, yalign)
+
+
+    @classmethod
+    def construct_from_reference_args(cls, args):
+        return cls.construct_from_reference_rad(args, args.zoom, args.width, args.height,
+           math.radians(args.longitude), math.radians(args.latitude), args.xalign, args.yalign)
+
+
+    @classmethod
+    def construct_to_fit_region_rad(cls, args, width, height, reg_west_rad, reg_east_rad,
+                                    reg_north_rad, reg_south_rad, xalign, yalign):
+        if reg_west_rad>=reg_east_rad:
+            reg_east_rad += 2*math.pi*math.ceil(0.5*(reg_west_rad-reg_east_rad)/math.pi+1e-10)
+        max_lat = gd(math.pi)-1e-10
+        if reg_north_rad<reg_south_rad:
+            (reg_north_rad, reg_south_rad) = (reg_south_rad, reg_north_rad)
+        if reg_north_rad > max_lat:
+            reg_north_rad = max_lat
+        if reg_south_rad < -max_lat:
+            reg_south_rad = -max_lat
+        zoom = max( 0, 1 + math.floor( math.log2( math.pi *
+            min( width/(reg_east_rad-reg_west_rad), height/(arggd(reg_north_rad)-arggd(reg_south_rad)))
+            )))
+        P  = 2**(zoom-1)/math.pi
+
+        if xalign<0:
+            a1 = (reg_west_rad+math.pi)*P
+            a2 = a1 + width
+        elif xalign>0:
+            a2 = (reg_east_rad+math.pi)*P
+            a1 = a2 - width
+        else:
+            a1 = ((reg_west_rad+reg_east_rad)/2+math.pi)*P - width/2
+            a2 = a1 + width
+
+        if yalign<0:
+            b1 = (math.pi-arggd(reg_north_rad))*P
+            b2 = b1 + height
+        elif yalign>0:
+            b2 = (math.pi-arggd(reg_south_rad))*P
+            b1 = b2 - height
+        else:
+            b1 = (math.pi-(arggd(reg_north_rad)+arggd(reg_south_rad))/2)*P - height/2
+            b2 = b1 + height
+        west_rad  = a1/P - math.pi
+        north_rad = gd(math.pi-b1/P)
+        east_rad  = a2/P - math.pi
+        south_rad = gd(math.pi-b2/P)
+        x1 = math.floor(a1)
+        y1 = math.floor(b1)
+        x2 = math.ceil(a2)-1
+        y2 = math.ceil(b2)-1
+        west_offset  = a1-x1
+        north_offset = b1-y1
+        south_offset = y2-b2+1
+        return cls(args, west_rad, east_rad, north_rad, south_rad, zoom, x1, y1, x2, y2,
+                    width, height, west_offset, north_offset, south_offset )
+
+
+    @classmethod
+    def construct_to_fit_region_deg(cls, args, width, height,
+                                    reg_west_deg, reg_east_deg, reg_north_deg, reg_south_deg,
+                                    xalign, yalign):
+        return cls.construct_to_fit_region_rad(args, width, height,
+                math.radians(reg_west_deg),math.radians(reg_east_deg),
+                math.radians(reg_north_deg),math.radians(reg_south_deg),
+                xalign, yalign)
+
+
+    @classmethod
+    def construct_to_fit_region_args(cls, args):
+        return cls.construct_to_fit_region_rad(args, args.width, args.height,
+                math.radians(args.west),math.radians(args.east),
+                math.radians(args.north),math.radians(args.south),
+                args.xalign, args.yalign)
+
+
+    def get_tile_quantity(self):
+        return (self.x_2-self.x_1+1)*(self.y_2-self.y_1+1)
+
+
+    def get_pixel_quantity(self):
+        return self.pixel_width*self.pixel_height
+
+
+    def download_tiles(self, url_format, local_file_prefix):
+        self.local_file_prefix = local_file_prefix
+        makeparentdirs(local_file_prefix)
+        with requests.Session() as s:
+            s.headers.update(dict(referer = 'mercatormap/'+packageversion))
+            try:
+                for xx in range(self.x_1, self.x_2+1):
+                    x = xx % self.n
+                    for y in range(self.y_1, self.y_2+1):
+                        if (y>=0) and (y<self.n):
+                            url = url_format.format(x=x, y=y, z=self.zoom)
+                            filename = local_file_prefix + '_{z}_{x}_{y}.png'.format(x=x, y=y, z=self.zoom)
+                            download(s,url,filename)
+            except requests.exceptions.RequestException as err:
+                print('Download error:', err)
+                return False
+        return True
+
+
+    def merge_map(self, map_definition, local_file_prefix):
+        makeparentdirs(map_definition)
+        new_im = Image.new('RGB', (self.pixel_width, self.pixel_height), 'white')
+        xoff = -round(self.west_offset*self.pixel)
+        for xx in range(self.x_1, self.x_2+1):
+            x = xx % self.n
+            yoff = -round(self.north_offset*self.pixel)
+            for y in range(self.y_1, self.y_2+1):
+                if (y>=0) and (y<self.n):
+                    filename = local_file_prefix + '_{z}_{x}_{y}.png'.format(x=x, y=y, z=self.zoom)
+                    new_im.paste(Image.open(filename), (xoff,yoff))
+                yoff+=self.pixel
+            xoff+=self.pixel
+        new_im.save(map_definition+'.png', optimize=True)
+        return True
+
+
+    def download_wms_map(self, url_format, map_definition):
+        makeparentdirs(map_definition)
+        # bbox in tiles for given zoom
+        xmin = self.x_1+self.west_offset
+        xmax = xmin+self.width
+        ymin = self.y_1+self.north_offset
+        ymax = ymin+self.height
+
+        # global scale bbox
+        f = math.pi*6378137
+        xmin = (2*xmin/self.n-1)*f
+        xmax = (2*xmax/self.n-1)*f
+        (ymin, ymax) = (ymax, ymin)   # switch ymin/ymax
+        ymin = (1-2*ymin/self.n)*f
+        ymax = (1-2*ymax/self.n)*f
+
+        url = url_format.format(xmin=xmin, ymin=ymin, xmax=xmax, ymax=ymax,
+            width=self.pixel_width, height=self.pixel_height)
+        filename = map_definition+'.png'
+        with requests.Session() as s:
+            s.headers.update(dict(referer = 'mercatormap/'+packageversion))
+            try:
+                download(s,url,filename,True)
+            except requests.exceptions.RequestException as err:
+                print('Download error:', err)
+                return False
+        return True
+
+
+    def save_map(self, map_definition, tiles=False, merge=False, wms=False):
+        makeparentdirs(map_definition)
+        with open(map_definition+'.def', "w", encoding="utf-8") as desc:
+            desc.write(f'% generated by mercatormap maptiles {packageversion}\n')
+            desc.write('\\mrcdefinemap{\n')
+            desc.write(f'  west={math.degrees(self.west)},\n')
+            desc.write(f'  east={math.degrees(self.east)},\n')
+            desc.write(f'  north={math.degrees(self.north)},\n')
+            desc.write(f'  south={math.degrees(self.south)},\n')
+            desc.write(f'  zoom={self.zoom},\n')
+            desc.write(f'  xmin={self.x_1},\n')
+            desc.write(f'  ymin={self.y_1},\n')
+            desc.write(f'  xmax={self.x_2},\n')
+            desc.write(f'  ymax={self.y_2},\n')
+            desc.write(f'  pixelwidth={self.pixel_width},\n')
+            desc.write(f'  pixelheight={self.pixel_height},\n')
+            desc.write(f'  westoffset={self.west_offset},\n')
+            desc.write(f'  northoffset={self.north_offset},\n')
+            desc.write(f'  southoffset={self.south_offset},\n')
+            desc.write(f'  basename={self.local_file_prefix},\n')
+            if self.attribution!=None:
+                desc.write('  attribution={'+self.attribution+'},\n')
+            if self.attributionprint!=None:
+                desc.write('  attribution print={'+self.attributionprint+'},\n')
+            if self.tilesize!=None:
+                desc.write(f'  tile size={self.tilesize},\n')
+            if wms:
+                desc.write(f'  resource=wmsmap,\n')
+            elif merge:
+                desc.write(f'  resource=mergedmap,\n')
+            elif tiles:
+                desc.write(f'  resource=tiles,\n')
+            else:
+                desc.write(f'   resource=none,\n')
+            desc.write('}\n')
+        return
+
+
+    def print_description(self):
+        print('------ map description (class) ------')
+        print(f'west    = {math.degrees(self.west)}')
+        print(f'east    = {math.degrees(self.east)}')
+        print(f'north   = {math.degrees(self.north)}')
+        print(f'south   = {math.degrees(self.south)}')
+        print(f'zoom    = {self.zoom}')
+        print(f'X_1     = {self.x_1}')
+        print(f'Y_1     = {self.y_1}')
+        print(f'X_2     = {self.x_2}')
+        print(f'Y_2     = {self.y_2}')
+        print(f'width   = {self.width}')
+        print(f'height  = {self.height}')
+        print(f'd_west  = {self.west_offset}')
+        print(f'd_north = {self.north_offset}')
+        print(f'd_south = {self.south_offset}')
+        return
+
+
+def map_tile_info(Z, X, Y):
+    N = 2.0 ** Z
+    lon_min = math.pi*(2*X-N)/N
+    lon_max = math.pi*(2*X+2-N)/N
+    lat_min = gd(math.pi*(N-2*Y-2)/N)
+    lat_max = gd(math.pi*(N-2*Y)/N)
+    r = 6371000
+    height   = r*(lat_max-lat_min)
+    rdel_lon = r*(lon_max-lon_min)
+    width_n  = rdel_lon*math.cos(lat_max)
+    width_s  = rdel_lon*math.cos(lat_min)
+    area     = r*rdel_lon*(math.sin(lat_max)-math.sin(lat_min))
+    print(f'(Z,X,Y) = ({Z},{X},{Y})')
+    print(f'west    = {math.degrees(lon_min)}')
+    print(f'east    = {math.degrees(lon_max)}')
+    print(f'south   = {math.degrees(lat_min)}')
+    print(f'north   = {math.degrees(lat_max)}')
+    print(f'height  = {height/1000}')
+    print(f'width(N)= {width_n/1000}')
+    print(f'width(S)= {width_s/1000}')
+    print(f'area    = {area/1000000}')
+    return
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(description='Compute a full map description and download map tiles')
+
+    parser.add_argument('type', type=str, help='type of map computation',
+                        choices=['boundaries', 'reference', 'areafit'])
+
+    parser.add_argument('-z', '--zoom', type=int, default=9,
+                            help='zoom level (boundaries/reference)')
+    parser.add_argument('-w', '--west', type=float, default=11,
+                            help='longitude west (boundaries/areafit)')
+    parser.add_argument('-e', '--east', type=float, default=13,
+                            help='longitude east (boundaries/areafit)')
+    parser.add_argument('-n', '--north', type=float, default=48,
+                            help='latitude north (boundaries/areafit)')
+    parser.add_argument('-s', '--south', type=float, default=50,
+                            help='latitude south (boundaries/areafit)')
+    parser.add_argument('-lon', '--longitude', type=float, default=12,
+                            help='longitude (reference)')
+    parser.add_argument('-lat', '--latitude', type=float, default=49,
+                            help='latitude (reference)')
+    parser.add_argument('-mw', '--width', type=float, default=4,
+                            help='map width as multiplicity of map tiles (reference/areafit)')
+    parser.add_argument('-mh', '--height', type=float, default=4,
+                            help='map height as multiplicity of map tiles (reference/areafit)')
+    parser.add_argument('-a', '--align', type=str, default='center',
+                            help='alignment of reference or area (reference/areafit)',
+                            choices=['northwest', 'north', 'northeast',
+                                     'west', 'center', 'east',
+                                     'southwest', 'south', 'southeast'] )
+    parser.add_argument('-d', '--definition', type=str, default='mapdefinition',
+                            help='name of the produced map definition for LaTeX')
+    parser.add_argument('-t', '--target', type=str, default='tiles',
+                            help='target to create tiles or a merged map',
+                            choices=['none', 'tiles', 'mergedmap', 'wmsmap'] )
+    parser.add_argument('-u', '--url', type=str, default=None,
+                            help='url format with placeholder {z}{x}{y} for downloading tiles')
+    parser.add_argument('-at', '--attribution', type=str, default=None,
+                            help='attribution text of the tile producer')
+    parser.add_argument('-atp', '--attributionprint', type=str, default=None,
+                            help='attribution text of the tile producer')
+    parser.add_argument('-f', '--fileprefix', type=str, default='tiles/unknown',
+                            help='prefix for local tile files, e.g. "tiles/map" for "tiles/map_10_10_10.png"')
+    parser.add_argument('-c', '--confirm', action="store_true",
+                            help='confirm bulk download for map tiles')
+    parser.add_argument('-p', '--pixel', type=int, default=256,
+                            help='pixel width/height of a tile')
+    parser.add_argument('-ts', '--tilesize', type=str, default=None,
+                            help='TeX tile size')
+
+    args = parser.parse_args()
+
+    print('')
+    print('** This is maptiles.py version', packageversion,
+              'for generating', args.definition)
+
+    switcher = {
+        'northwest': (-1,-1),
+        'north':     ( 0,-1),
+        'northeast': ( 1,-1),
+        'west':      (-1, 0),
+        'center':    ( 0, 0),
+        'east':      ( 1, 0),
+        'southwest': (-1, 1),
+        'south':     ( 0, 1),
+        'southeast': ( 1, 1)
+        }
+    (args.xalign, args.yalign) = switcher.get(args.align)
+
+    switcher = {
+        'boundaries': MapDefinition.construct_from_boundaries_args,
+        'reference':  MapDefinition.construct_from_reference_args,
+        'areafit':    MapDefinition.construct_to_fit_region_args
+    }
+    mapdef = switcher.get(args.type)(args)
+
+    switcher = {
+        'none':      0,
+        'tiles':     1,
+        'mergedmap': 2,
+        'wmsmap':    3
+    }
+    target = switcher.get(args.target)
+
+    tiles_success = False
+    merge_success = False
+    wms_success = False
+
+    if target>0:
+        if args.url!=None:
+            if target<3:
+                if mapdef.get_tile_quantity()>400:
+                    if args.confirm:
+                        tiles_success = mapdef.download_tiles(args.url, args.fileprefix)
+                    else:
+                        print(f'Too many tiles ({mapdef.get_tile_quantity()}). Add confirm option to proceed anyway.');
+                else:
+                    tiles_success = mapdef.download_tiles(args.url, args.fileprefix)
+                if tiles_success:
+                    print('** Download of tiles successful for', args.definition)
+                    if target>1:
+                        merge_success = mapdef.merge_map(args.definition, args.fileprefix)
+                        if merge_success:
+                            print('** Merging tiles successful for', args.definition)
+                        else:
+                            print('** WARNING: Merging tiles failed for', args.definition)
+                else:
+                    print('** WARNING: Map tiles download failed for', args.definition)
+            else:
+                if mapdef.get_pixel_quantity()>100000000:
+                    if args.confirm:
+                        wms_success = mapdef.download_wms_map(args.url, args.definition)
+                    else:
+                        print(f'Too many pixels ({mapdef.get_pixel_quantity()}). Add confirm option to proceed anyway.');
+                else:
+                    wms_success = mapdef.download_wms_map(args.url, args.definition)
+        else:
+            print('No url for download given')
+
+    mapdef.save_map(args.definition, tiles_success, merge_success, wms_success)
+\end{filecontents*}
+
diff --git a/Master/texmf-dist/tex/latex/mercatormap/mercatorsupplier.def b/Master/texmf-dist/tex/latex/mercatormap/mercatorsupplier.def
new file mode 100644
index 00000000000..438374ba26f
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/mercatormap/mercatorsupplier.def
@@ -0,0 +1,290 @@
+%% The LaTeX package mercatormap - version 1.00 (2020/04/20)
+%% mercatorsupplier.def: predefined map supplier list
+%%
+%% -------------------------------------------------------------------------------------------
+%% Copyright (c) 2020 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% -------------------------------------------------------------------------------------------
+%%
+%% This work may be distributed and/or modified under the
+%% conditions of the LaTeX Project Public License, either version 1.3
+%% of this license or (at your option) any later version.
+%% The latest version of this license is in
+%%   http://www.latex-project.org/lppl.txt
+%% and version 1.3 or later is part of all distributions of LaTeX
+%% version 2005/12/01 or later.
+%%
+%% This work has the LPPL maintenance status `author-maintained'.
+%%
+%% This work consists of all files listed in README
+%%
+
+\NewDocumentCommand\mrcumlaut{m}{\"{#1}}
+
+\cs_new:Npn \__mermap_new_supply_source:nn #1#2
+  {
+    \keys_define:nn { mermap/supply/_source }
+      {
+        #1 .meta:nn = {mermap/supply}{#2}
+      }
+  }
+
+\NewDocumentCommand\mrcnewsupplysource {mm} {
+  \__mermap_new_supply_source:nn {#1}{#2}
+}
+
+\__mermap_new_supply_source:nn { dummy }
+  {
+    url               = http://127.0.0.1/dummy/{z}/{x}/{y}.png,
+    attribution       = {Dummy~tile~server},
+    attribution~print = {Dummy~tile~server},
+    basename          = tiles/dummy,
+  }
+
+\__mermap_new_supply_source:nn { opentopomap }
+  {
+    url = https://tile.opentopomap.org/{z}/{x}/{y}.png,
+    attribution = {
+      Kartendaten:~\textcopyright\nobreakspace\href{https://openstreetmap.org/copyright}{OpenStreetMap}
+      \ Mitwirkende,~SRTM\nobreakspace\textbar\nobreakspace
+      Kartendarstellung:~\textcopyright\nobreakspace\href{http://opentopomap.org/}{OpenTopoMap}
+      \ (\href{https://creativecommons.org/licenses/by-sa/3.0/}{CC-BY-SA})
+    },
+    attribution~print = {
+      Kartendaten:~\textcopyright\nobreakspace www.openstreetmap.org/copyright,
+      \ SRTM\nobreakspace\textbar\nobreakspace
+      Kartendarstellung:~\textcopyright\nobreakspace opentopomap.org~(CC-BY-SA)
+    },
+    basename = tiles/opentopomap,
+  }
+
+\keys_define:nn { mermap/supply }
+  {
+    __attribution_topplusopen .meta:nn = {mermap/supply} {
+    attribution = {
+      \textcopyright\nobreakspace\href{http://www.bkg.bund.de}{Bundesamt~f\mrcumlaut{u}r~Kartographie~und~Geod\mrcumlaut{a}sie}\nobreakspace\the\year,
+      \ \href{http://sg.geodatenzentrum.de/web_public/Datenquellen_TopPlus_Open.pdf}{Datenquellen}
+      },
+    attribution~print = {
+      \textcopyright\nobreakspace Bundesamt~f\mrcumlaut{u}r~Kartographie~und~Geod\mrcumlaut{a}sie\nobreakspace\the\year,
+      \ Datenquellen:~\detokenize{http://sg.geodatenzentrum.de/web_public/Datenquellen_TopPlus_Open.pdf}
+      }
+    }
+  }
+
+\__mermap_new_supply_source:nn { topplusopen~web }
+  {
+    url = {https://sgx.geodatenzentrum.de/wmts_topplus_open/tile/1.0.0/web/default/WEBMERCATOR/{z}/{y}/{x}.png},
+    __attribution_topplusopen,
+    basename = tiles/tpo_web,
+  }
+
+\__mermap_new_supply_source:nn { topplusopen~web~grau }
+  {
+    url = {https://sgx.geodatenzentrum.de/wmts_topplus_open/tile/1.0.0/web_grau/default/WEBMERCATOR/{z}/{y}/{x}.png},
+    __attribution_topplusopen,
+    basename = tiles/tpo_web_grau,
+  }
+
+\cs_new:Npn \__mermap_new_supply_source_topplusopen:n #1
+  {
+    \keys_define:nn { mermap/supply/_source }
+      {
+        topplusopen~#1 .meta:nn = {mermap/supply}{
+          url = {https://sgx.geodatenzentrum.de/wms_topplus_open?service=wms&version=1.3.0&request=GetMap&Layers=#1&STYLES=default&CRS=EPSG:3857&bbox={xmin},{ymin},{xmax},{ymax}&width={width}&height={height}&Format=image/png},
+          __attribution_topplusopen,
+          basename = tiles/tpo,
+        },
+        topplusopen~#1~grau .meta:nn = {mermap/supply}{
+          url = {https://sgx.geodatenzentrum.de/wms_topplus_open?service=wms&version=1.3.0&request=GetMap&Layers=#1_grau&STYLES=default&CRS=EPSG:3857&bbox={xmin},{ymin},{xmax},{ymax}&width={width}&height={height}&Format=image/png},
+          __attribution_topplusopen,
+          basename = tiles/tpo,
+        },
+      }
+  }
+\__mermap_new_supply_source_topplusopen:n { p5 }
+\__mermap_new_supply_source_topplusopen:n { p10 }
+\__mermap_new_supply_source_topplusopen:n { p17.5 }
+\__mermap_new_supply_source_topplusopen:n { p25 }
+\__mermap_new_supply_source_topplusopen:n { p50 }
+\__mermap_new_supply_source_topplusopen:n { p100 }
+\__mermap_new_supply_source_topplusopen:n { p250 }
+
+\__mermap_new_supply_source:nn { openrouteservice~mapsurfer }
+  {
+    url~with~api~key = {https://api.openrouteservice.org/mapsurfer/{z}/{x}/{y}.png?api_key=}{openrouteservice}{},
+    attribution = {
+      Service~\textcopyright\nobreakspace\href{https://openrouteservice.org/}{openrouteservice.org}
+      \nobreakspace\textbar\nobreakspace
+      Map~data~\textcopyright\nobreakspace\href{https://openstreetmap.org/copyright}{OpenStreetMap}~contributors
+    },
+    attribution~print = {
+      Service~\textcopyright\nobreakspace openrouteservice.org
+      \nobreakspace\textbar\nobreakspace
+      Map~data~\textcopyright\nobreakspace OpenStreetMap~contributors
+    },
+    basename = tiles/mapsurfer,
+  }
+
+\keys_define:nn { mermap/supply }
+  {
+    __attribution_stamen .meta:nn = {mermap/supply} {
+    attribution = {
+      Map~tiles~by~\href{http://stamen.com}{Stamen~Design},
+      \ under~\href{http://creativecommons.org/licenses/by/3.0}{CC~BY~3.0}.
+      \ Data~by~\href{http://openstreetmap.org}{OpenStreetMap},
+      \ under~\href{http://www.openstreetmap.org/copyright}{ODbL}.
+      },
+    attribution~print = {
+      Map~tiles~by~Stamen~Design~(stamen.com),
+      \ under~CC~BY~3.0.
+      \ Data~by~OpenStreetMap,
+      \ under~ODbl~(www.openstreetmap.org/copyright).
+      }
+    }
+  }
+\__mermap_new_supply_source:nn { stamen~terrain }
+  {
+    url = {https://stamen-tiles-a.a.ssl.fastly.net/terrain/{z}/{x}/{y}.png},
+    __attribution_stamen,
+    basename = tiles/terrain,
+  }
+\__mermap_new_supply_source:nn { stamen~terrain-background }
+  {
+    url = {https://stamen-tiles-a.a.ssl.fastly.net/terrain-background/{z}/{x}/{y}.png},
+    __attribution_stamen,
+    basename = tiles/terrain-background,
+  }
+\__mermap_new_supply_source:nn { stamen~terrain-labels }
+  {
+    url = {https://stamen-tiles-a.a.ssl.fastly.net/terrain-labels/{z}/{x}/{y}.png},
+    __attribution_stamen,
+    basename = tiles/terrain-labels,
+  }
+\__mermap_new_supply_source:nn { stamen~terrain-lines }
+  {
+    url = {https://stamen-tiles-a.a.ssl.fastly.net/terrain-lines/{z}/{x}/{y}.png},
+    __attribution_stamen,
+    basename = tiles/terrain-lines,
+  }
+\__mermap_new_supply_source:nn { stamen~toner }
+  {
+    url = {https://stamen-tiles-a.a.ssl.fastly.net/toner/{z}/{x}/{y}.png},
+    __attribution_stamen,
+    basename = tiles/toner,
+  }
+\__mermap_new_supply_source:nn { stamen~toner-lite }
+  {
+    url = {https://stamen-tiles-a.a.ssl.fastly.net/toner-lite/{z}/{x}/{y}.png},
+    __attribution_stamen,
+    basename = tiles/toner-lite,
+  }
+\__mermap_new_supply_source:nn { stamen~toner-hybrid }
+  {
+    url = {https://stamen-tiles-a.a.ssl.fastly.net/toner-hybrid/{z}/{x}/{y}.png},
+    __attribution_stamen,
+    basename = tiles/toner-hybrid,
+  }
+\__mermap_new_supply_source:nn { stamen~toner-background }
+  {
+    url = {https://stamen-tiles-a.a.ssl.fastly.net/toner-background/{z}/{x}/{y}.png},
+    __attribution_stamen,
+    basename = tiles/toner-background,
+  }
+\__mermap_new_supply_source:nn { stamen~toner-labels }
+  {
+    url = {https://stamen-tiles-a.a.ssl.fastly.net/toner-labels/{z}/{x}/{y}.png},
+    __attribution_stamen,
+    basename = tiles/toner-labels,
+  }
+\__mermap_new_supply_source:nn { stamen~toner-lines }
+  {
+    url = {https://stamen-tiles-a.a.ssl.fastly.net/toner-lines/{z}/{x}/{y}.png},
+    __attribution_stamen,
+    basename = tiles/toner-lines,
+  }
+\__mermap_new_supply_source:nn { stamen~watercolor }
+  {
+    url = {https://stamen-tiles-a.a.ssl.fastly.net/watercolor/{z}/{x}/{y}.png},
+    attribution = {
+      Map~tiles~by~\href{http://stamen.com}{Stamen~Design},
+      \ under~\href{http://creativecommons.org/licenses/by/3.0}{CC~BY~3.0}.
+      \ Data~by~\href{http://openstreetmap.org}{OpenStreetMap},
+      \ under~\href{http://creativecommons.org/licenses/by-sa/3.0}{CC~BY~SA}.
+      },
+    attribution~print = {
+      Map~tiles~by~Stamen~Design~(stamen.com),
+      \ under~CC~BY~3.0.
+      \ Data~by~OpenStreetMap,
+      \ under~CC~BY~SA.
+      },
+    basename = tiles/watercolor,
+  }
+
+\keys_define:nn { mermap/supply }
+  {
+    __attribution_thunderforest .meta:nn = {mermap/supply} {
+    attribution = {
+        Maps~\textcopyright\nobreakspace\href{https://www.thunderforest.com/}{Thunderforest},
+        \ Data~\textcopyright\nobreakspace\href{https://openstreetmap.org/copyright}{OpenStreetMap~contributors}
+      },
+    attribution~print = {
+        Maps~\textcopyright\nobreakspace www.thunderforest.com,
+        \ Data~\textcopyright\nobreakspace www.osm.org/copyright
+      }
+    }
+  }
+\__mermap_new_supply_source:nn { thunderforest~opencyclemap }
+  {
+    url~with~api~key = {https://tile.thunderforest.com/cycle/{z}/{x}/{y}.png?apikey=}{thunderforest}{},
+    __attribution_thunderforest,
+    basename = tiles/opencyclemap,
+  }
+\__mermap_new_supply_source:nn { thunderforest~transport }
+  {
+    url~with~api~key = {https://tile.thunderforest.com/transport/{z}/{x}/{y}.png?apikey=}{thunderforest}{},
+    __attribution_thunderforest,
+    basename = tiles/transport,
+  }
+\__mermap_new_supply_source:nn { thunderforest~landscape }
+  {
+    url~with~api~key = {https://tile.thunderforest.com/landscape/{z}/{x}/{y}.png?apikey=}{thunderforest}{},
+    __attribution_thunderforest,
+    basename = tiles/landscape,
+  }
+\__mermap_new_supply_source:nn { thunderforest~outdoors }
+  {
+    url~with~api~key = {https://tile.thunderforest.com/outdoors/{z}/{x}/{y}.png?apikey=}{thunderforest}{},
+    __attribution_thunderforest,
+    basename = tiles/outdoors,
+  }
+\__mermap_new_supply_source:nn { thunderforest~transport-dark }
+  {
+    url~with~api~key = {https://tile.thunderforest.com/transport-dark/{z}/{x}/{y}.png?apikey=}{thunderforest}{},
+    __attribution_thunderforest,
+    basename = tiles/transport-dark,
+  }
+\__mermap_new_supply_source:nn { thunderforest~spinal-map }
+  {
+    url~with~api~key = {https://tile.thunderforest.com/spinal-map/{z}/{x}/{y}.png?apikey=}{thunderforest}{},
+    __attribution_thunderforest,
+    basename = tiles/spinal-map,
+  }
+\__mermap_new_supply_source:nn { thunderforest~pioneer }
+  {
+    url~with~api~key = {https://tile.thunderforest.com/pioneer/{z}/{x}/{y}.png?apikey=}{thunderforest}{},
+    __attribution_thunderforest,
+    basename = tiles/pioneer,
+  }
+\__mermap_new_supply_source:nn { thunderforest~mobile-atlas }
+  {
+    url~with~api~key = {https://tile.thunderforest.com/mobile-atlas/{z}/{x}/{y}.png?apikey=}{thunderforest}{},
+    __attribution_thunderforest,
+    basename = tiles/mobile-atlas,
+  }
+\__mermap_new_supply_source:nn { thunderforest~neighbourhood }
+  {
+    url~with~api~key = {https://tile.thunderforest.com/neighbourhood/{z}/{x}/{y}.png?apikey=}{thunderforest}{},
+    __attribution_thunderforest,
+    basename = tiles/neighbourhood,
+  }
+
diff --git a/Master/tlpkg/bin/tlpkg-ctan-check b/Master/tlpkg/bin/tlpkg-ctan-check
index ccb3e480862..ed969d6f7df 100755
--- a/Master/tlpkg/bin/tlpkg-ctan-check
+++ b/Master/tlpkg/bin/tlpkg-ctan-check
@@ -478,7 +478,7 @@ my @TLP_working = qw(
     mdframed mdputu mdsymbol mdwtools media4svg media9 medstarbeamer
     meetingmins memdesign memexsupp
     memoir MemoirChapStyles memory memorygraphs mendex-doc mentis
-    mensa-tex menu menukeys merriweather
+    mensa-tex menu menukeys mercatormap merriweather
     metafont-beginners metago metalogo metalogox metaobj metaplot
     metapost-colorbrewer metapost-examples metastr metatex metatype1 metauml
     method metre metrix
diff --git a/Master/tlpkg/tlpsrc/collection-pictures.tlpsrc b/Master/tlpkg/tlpsrc/collection-pictures.tlpsrc
index 306b4c3508b..e74f7c48e30 100644
--- a/Master/tlpkg/tlpsrc/collection-pictures.tlpsrc
+++ b/Master/tlpkg/tlpsrc/collection-pictures.tlpsrc
@@ -84,6 +84,7 @@ depend luasseq
 depend maker
 depend makeshape
 depend mathspic
+depend mercatormap
 depend milsymb
 depend miniplot
 depend mkpic
diff --git a/Master/tlpkg/tlpsrc/mercatormap.tlpsrc b/Master/tlpkg/tlpsrc/mercatormap.tlpsrc
new file mode 100644
index 00000000000..e69de29bb2d
--- /dev/null
+++ b/Master/tlpkg/tlpsrc/mercatormap.tlpsrc
author	Karl Berry <karl@freefriends.org>	2020-04-20 21:10:20 +0000
committer	Karl Berry <karl@freefriends.org>	2020-04-20 21:10:20 +0000
commit	36db81e567665da0b8e92831b69d2a71971312f3 (patch)
tree	c543aa6948c99b1ecb316c4386ee34dfeed4d384
parent	c01e3cc67bce910fad535c50c41da044fc23e882 (diff)