by Christian Graefe
The GPX (GPS Exchange Format) provider reads data from a GPX datasource.
It supports waypoints, routes and tracks which can be rendered with SharpMap.
Now the Gpx provider deserializes the GPX file into a xsd.exe generated
object structure for validated reading.
So be aware that any invalid Gpx file 1.1 will not be rendered by this extension.
For validating your Gpx file use tools like XMLSpy (http://www.altova.com/download/xmlspy/freexml
Extension updated August 07 2006