Handy gpsbabel conversions:
Google KML to GPX:
To translate waypoints into tracks, in order to use in GPS Photo Correlate (gpscorrelate):
gpsbabel -w -s -N -i kml -f “google-waypoints.kml” -x transform,trk=wpt -o gpx -F “waypoints.gpx”
If a number of waypoint files (NMEA, GPX, etc.) were originally concatenated, the resulting .kml may not be in chronological order anymore, and will need to be sorted by timestamps:
gpsbabel -w -s -N -i kml -f “google-waypoints.kml” -x sort,time -o gpx -F “waypoints-sorted.gpx”
Then if the file is still needed to be transformed from waypoints to tracks:
gpsbabel -w -s -N -i gpx -f “waypoints-sorted.gpx” -x transform,trk=wpt -o gpx -F “waypoints-translated-to-tracks.gpx”