====== GPS ======
  * http://trackprofiler2.appspot.com/
  * http://wtracks.appspot.com/
  * http://sourceforge.net/projects/gpxeditor/
  * http://www.gpstrackeditor.com/
  * http://inlinepaceline.wordpress.com/2012/04/22/how-to-video-overlays-with-gps-data/