We use an external library to convert geospatial data from Geo feeds. This is experimental and only specific formats (KML, GeoRSS, GPX) are supported. Furthermore not all dynamic features (like KML network links) may work.
Please make sure that the feed is valid and accessible. The file extension needs to match the file format.
The following Geo feeds have been tested:
https://raw.githubusercontent.com/phayes/geoPHP/master/tests/input/point.kml (KML)
https://raw.githubusercontent.com/phayes/geoPHP/master/tests/input/point.georss (GeoRSS)
https://raw.githubusercontent.com/phayes/geoPHP/master/tests/input/route.gpx (GPX)