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<h2 id="data">Data files</h2>
<p>GPXSee opens GPX, TCX, FIT, KML, IGC, NMEA and
<a href="http://www.poi-factory.com/garmin-csv-file-format">Garmin CSV</a>
files, however not all format features are supported for all formats.
Generally, GPXSee supports three kinds of data objects:</p>
<ul>
<li>Tracks</li>
<li>Routes</li>
<li>Waypoints</li>
</ul>
<p>Naturally, if a format supports only a subset of the objects, GPXSee also
supports only this subset. Some formats - especially KML - have support for
a plenty of other data objects like surfaces or even 3D structures. Those are
not supported by GPXSee.</p>
<p>In addition to GPS data, data from the following sensors is supported
by GPXSee:</p>
<ul>
<li>Heart rate</li>
<li>Cadence</li>
<li>Power</li>
<li>Temperature</li>
</ul>
<h2 id="maps">Maps</h2>
<p>Two kinds of maps are supported by GPXSee - online maps and offline maps.
You may either load them "ad hoc" from the GUI or they can be loaded
automatically at program startup from the following directory:</p>
<table class="config-files">
<tr>
<td class="os">Windows:</td>
<td class="file">C:\Program Files\GPXSee\maps</td>
</tr><tr>
<td class="os">Linux:</td>
<td class="file">/usr/share/gpxsee/maps</td>
</tr><tr>
<td class="os">OS X:</td>
<td class="file">/Applications/GPXSee.app/Contents/Resources/maps</td>
</tr>
</table>
<p>User specific map directories that - when present - override the global map
directory are also supported. The paths are as follows:</p>
<table class="config-files">
<tr>
<td class="os">Windows:</td>
<td class="file">%HOMEPATH%\GPXSee\maps</td>
</tr><tr>
<td class="os">OS X, Linux:</td>
<td class="file">$HOME/.gpxsee/maps</td>
</tr>
</table>
<p>The map directory is recursively searched when loading the maps, so it
may contain an arbitrary directory structure.</p>
<h3 id="online">Online maps</h3>
<p>GPXSee supports most tile server based online maps out there, but the
<a href="https://github.com/tumic0/GPXSee/tree/master/pkg/maps">list
of maps</a> distributed with the official packages is limited to those
that are "freely distributable". You may however easily extend (or change)
the default map list with your own map sources definitions.</p>
<p>The mapsource definition file format is based on XML and is quiet simple.
The root <i>map</i> element contains two mandatory elements - <i>name</i>
and <i>url</i>, and two optional elements - <i>zoom</i> and <i>bounds</i>.
The tile X and Y coordinates are replaced with <code>$x</code> and
<code>$y</code> in the URL and the zoom level is replaced with
<code>$z</code>. An example map source definition file could look like:</p>
<pre>
&lt;?xml version="1.0" encoding="UTF-8"?&gt;
&lt;map&gt;
&lt;name&gt;Czech Republic&lt;/name&gt;
&lt;url&gt;http://tile.server.cz/map/$z/$x/$y.png&lt;/url&gt;
&lt;zoom min="2" max="15"/&gt;
&lt;bounds left="12.3" bottom="48.6" right="18.9" top="51.2"/&gt;
&lt;/map&gt;
</pre>
<p>The bounds are WGS84 latitude/longitude values in degrees. If omitted, the
default zoom range is &lt;0,&nbsp;19&gt; and the default bounds are
&lt;-85.0511,&nbsp;85.0511&gt; and &lt;-180,&nbsp;180&gt;.</p>
<h3 id="offline">Offline maps</h3>
<p>OziExplorer maps, TrekBuddy maps/atlases and GeoTIFF images are supported by
GPXSee. Supported map projections are Web Mercator, Transverse Mercator, UTM,
Lambert Conformal Conic, Albers Equal Area, Lambert Azimuthal Equal Area and
Latitude/Longitude (2D geographic). For list of supported datums and PCSs see
the <code>ellipsoids.csv</code>, <code>GCS.csv</code> and <code>PCS.csv</code>
configuration files (can be modified or overridden by user files like the map
directory).</p>
<p>You may easily create offline atlases from online map services by using
<a href="http://mobac.sourceforge.net/">Mobile Atlas Creator (MOBAC)</a>.</p>
<h2 id="poi">POI files</h2>
<p>All of the supported formats with waypoints capability - GPX, KML, TCX, NMEA
and Garmin CSV - can be loaded either as data files or as POI files. When a file
is opened as a POI file, only waypoints reasonable near the tracks/waypoints of
the loaded data files are displayed.</p>
<p>To make GPXSee load a POI file automatically on startup, add the file to the
<code>POI</code> directory in one of the configuration paths.</p>
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<h4><a href="#data">Data files</a></h4>
<h4><a href="#maps">Maps</a></h4>
<h5><a href="#online">Online maps</a></h5>
<h5><a href="#offline">Offline maps</a></h5>
<h4><a href="#poi">POI files</a></h4>
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