- A friend of mine bought some really cheap nav software for his PocketPC PDA. This software allows him to download map data from the web for an area or a route (like Maemo Mapper). His software lets him look at the map offline (like Maemo Mapper). His software lets him route from two points off-line (not like Maemo Mapper). If I have all of the map data from Google maps and click on a point, why can Maemo Mapper not route me to there from my current GPS location?