
	gpx                   GPX XML
	  snlen                 Length of generated shortnames
	  suppresswhite         (0/1) No whitespace in generated shortnames
	  logpoint              (0/1) Create waypoints from geocache log entries
	  urlbase               Base URL for link tag in output
	  gpxver                Target GPX version for output
	  humminbirdextensio    (0/1) Add info (depth) as Humminbird extension
	  garminextensions      (0/1) Add info (depth) as Garmin extension
	  elevprec              Precision of elevations, number of decimals

