Navigate with your own maps or images overlaid on to maps from Google. Track your current location. Use waypoints to mark locations and calculate distances. Navigate to a waypoint with the built-in compass. Creating an overlay is easy: select two points on any image and match them to the corresponding points on the map. Usages include: - Overlay a trail map of your local hiking, mountain biking, trail running or cross-country skiing area. Track where you are via GPS. Display the distance to y