Displays a set of properties under /scenery/sources
This property tree is populated with the contents
of sources.xml files in Scenery directories. Such
files should have the following format:
<?xml version="1.0"?>
<PropertyList>
<source>
<name>Corine Land Cover (CLC) 2018, Version 2020_20u1</name>
<link>http://web.archive.org/web/20221112175615/https://land.copernicus.eu/pan-european/corine-land-cover/clc2018?tab=metadata%2A</link>
<license>GMES Open License</license>
</source>
<source>
<name>NASADEM Merged DEM Global 1 arc second V001</name>
<link>https://www.earthdata.nasa.gov/</link>
<license>Public Domain</license>
</source>
<source>
<name>OpenStreetMap</name>
<link>https://www.openstreetmap.org/copyright</link>
<license>Open Data Commons Open Database License</license>
</source>
</PropertyList>
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