<GDAL_WMS><Servicename="TiledWMS"><ServerUrl>http://map1.vis.earthdata.nasa.gov/twms-geo/twms.cgi?</ServerUrl><TiledGroupName>MODIS TERRA tileset</TiledGroupName><!-- Pick a specific day --><Changekey="${time}">2012-11-27</Change></Service></GDAL_WMS>