OkMap help you to: Calibrate raster maps, Create own vectorial maps, Display simultaneously raster maps and vectorial data, Import digital data, Create on maps waypoints, routes and tracks, Use digital terrain models, Works with GPX format, Autorouting and Geocoding functions, Upload and download to and from a GPS device, Navigate in real time, Make conversions between coordinates, datums, formats, etc.., Calculator, Many other things...