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Added WMS map type description
Updated WMTS info
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doc.html
@ -97,28 +97,34 @@
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<p>The map directory is recursively searched when loading the maps, so it
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may contain an arbitrary directory structure.</p>
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<h3 id="online">Online maps</h3>
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<h4 id="TS">OSM/Google tiles</h4>
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<p>The mapsource definition file format is based on XML and is fairly simple.
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For the formal map source file syntax see the <a href="map/1/map.xsd">mapsource
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XSD file</a>. The paragraphs below are a "human-readable" summary of the XSD
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syntax/semantics divided by map type.</p>
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<h4 id="OSM">OSM/Google tiles</h4>
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<p>GPXSee supports most tile server based online maps out there, but the
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<a href="https://github.com/tumic0/GPXSee/tree/master/pkg/maps">list
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of maps</a> distributed with the official packages is limited to those
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that are "freely distributable". You may however easily extend (or change)
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the default map list with your own map sources definitions.</p>
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<p>The mapsource definition file format is based on XML and is fairly simple.
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The root <i>map</i> element contains two mandatory elements - <i>name</i>
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<p>The root <i>map</i> element contains two mandatory elements - <i>name</i>
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and <i>url</i>, and two optional elements - <i>zoom</i> and <i>bounds</i>.
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The tile X and Y coordinates are replaced with <code>$x</code> and
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<code>$y</code> in the URL and the zoom level is replaced with
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<code>$z</code>. An example map source definition file could look like:</p>
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<code>$z</code>. An example map source definition file can look like:</p>
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<pre>
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<?xml version="1.0" encoding="UTF-8"?>
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<map>
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<name>Czech Republic</name>
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<url>http://tile.server.cz/map/$z/$x/$y.png</url>
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<map xmlns="http://www.gpxsee.org/map/1" type="OSM">
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<name>USGS Imagery</name>
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<url>https://navigator.er.usgs.gov/tiles/aerial_Imagery.cgi/$z/$x/$y</url>
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<zoom min="2" max="15"/>
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<bounds left="12.3" bottom="48.6" right="18.9" top="51.2"/>
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<bounds bottom="0" top="74"/>
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</map>
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</pre>
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@ -131,33 +137,30 @@
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<i>map</i> element to <code>WMTS</code>. Both the KVP and REST access methods
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are supported.</p>
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<p>For KVP, the <i>url</i> element represents the WMTS base URL and three
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additional elements are required - <i>layer</i>, <i>style</i> and <i>set</i>
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(TileMatrixSet in WMTS). An optional <i>format</i> element may be specified
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defining the desired image format. If not set, <code>image/png</code> is
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used.</p>
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<p>For KVP, the <i>url</i> element represents the WMTS base URL and two
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additional elements are required - <i>layer</i> and <i>set</i>
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(TileMatrixSet in WMTS). Optional <i>format</i> and <i>style</i> elements may
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be specified defining the desired image format and layer style. If not set,
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<code>image/png</code> is used for <i>format</i> and the default style for
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<i>style</i>.</p>
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<pre>
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<?xml version="1.0" encoding="UTF-8"?>
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<map type="WMTS">
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<map xmlns="http://www.gpxsee.org/map/1" type="WMTS">
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<name>CUZK</name>
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<url>http://geoportal.cuzk.cz/WMTS_ZM_900913/WMTService.aspx</url>
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<format>image/png</format>
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<layer>zm</layer>
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<style>default</style>
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<set axis="yx">ogc:1.0:globalcrs84pixel</set>
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</map>
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</pre>
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<p>For REST access, the <i>url</i> element's <i>type</i> attribute must be set
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to <code>REST</code>. The URL then represents the URL of the capabilities XML
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document. The three mandatory elements - <i>layer</i>, <i>style</i> and
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<i>set</i> - must be present like in the KVP case. Defining the format has no
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relevance for the REST access method.</p>
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document. Defining the format has no relevance for the REST access method.</p>
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<pre>
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<?xml version="1.0" encoding="UTF-8"?>
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<map type="WMTS">
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<map xmlns="http://www.gpxsee.org/map/1" type="WMTS">
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<name>Wien - Ortho</name>
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<url type="REST">http://maps1.wien.gv.at/wmts/1.0.0/WMTSCapabilities.xml</url>
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<layer>lb</layer>
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@ -166,21 +169,39 @@
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</map>
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</pre>
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<p>There is one more important attribute - the <i>axis</i> attribute of the
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<i>set</i> element. It specifies the axis order for the CRS used for the
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tile matrix set. Technically the order should be obtainable from the CRS definition,
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but in praxis many servers use the wrong order. This is why GPXSee uses <b>x,y
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(lon,lat) as default</b> and if the set uses the reverse order, the <i>axis</i>
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attribute must be set to <code>yx</code> in the map definition.</p>
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<i>set</i> element. It specifies the axis order of the CRS used for the
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tile matrix set. The default order is obtained from the CRS definition like
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specified in the standard, but in praxis many servers use a wrong order. This
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is why GPXSee enables overriding the default axis order using the <i>axis</i>
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attribute. Possible values are <code>xy</code> and <code>yx</code>.</p>
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<p>For the formal mapsource file syntax see the
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<a href="map/1/map.xsd">mapsource XSD file</a>.</p>
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<p>Finally, one can define additional dimensions like <code>Time</code> using
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the <i>dimension</i> element. Use a separate entry for every additional dimension.</p>
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<h4 id="WMS">WMS</h4>
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<p>WMS maps are distinguished by setting the <i>type</i> attribute of the
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<i>map</i> element to <code>WMS</code>. WMS map definitions are very similar to
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WMTS map definitions, the main difference is that you must specify the map
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CRS using the <i>crs</i> element instead of specifying the tile set. Like in the
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case of the <i>set</i> element, you may specify the <i>axis</i> attribute to
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override the default axis order.</p>
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<pre>
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<?xml version="1.0" encoding="UTF-8"?>
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<map xmlns="http://www.gpxsee.org/map/1" type="WMS">
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<name>CUZK-WMS</name>
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<url>http://geoportal.cuzk.cz/WMS_ZM50_PUB/WMService.aspx</url>
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<layer>GR_ZM50</layer>
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<crs>EPSG:3035</crs>
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</map>
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</pre>
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<h3 id="offline">Offline maps</h3>
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<p>OziExplorer maps, TrekBuddy maps/atlases and GeoTIFF images are supported by
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GPXSee. Supported map projections are Web Mercator, Transverse Mercator (including UTM),
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Lambert Conformal Conic, Albers Equal Area, Lambert Azimuthal Equal Area and
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Latitude/Longitude (2D geographic). For list of supported datums and PCSs see
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the <a href="https://github.com/tumic0/GPXSee/blob/master/pkg/csv/ellipsoids.csv">ellipsoids.csv</a>,
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GPXSee. Supported map projections are Web Mercator, Transverse Mercator
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(including UTM), Lambert Conformal Conic, Albers Equal Area, Lambert Azimuthal
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Equal Area and Latitude/Longitude (2D geographic). For list of supported datums
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and PCSs see the <a href="https://github.com/tumic0/GPXSee/blob/master/pkg/csv/ellipsoids.csv">ellipsoids.csv</a>,
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<a href="https://github.com/tumic0/GPXSee/blob/master/pkg/csv/gcs.csv">GCS.csv</a>
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and <a href="https://github.com/tumic0/GPXSee/blob/master/pkg/csv/pcs.csv">PCS.csv</a>
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configuration files (can be modified or overridden by user files like the map
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