2009/10/3 Marko Mäkelä <marko.makela@iki.fi>:
Another idea: would it be possible to create a global contour line map from the ASTER data and distribute it? Could the contour line map be an overlay on a more variable map? Would the tile borders have to match? Could the two maps (contours and OSM-based overlay) be enabled or disabled from the device's settings menu?
Yes, I already do this with my garmin map. It has elevation data, "base" map and maxspeed layer to be switched on and off individually. Have a look at these commands that explain how the German "All in one Map"(not my work!) is created: http://wiki.openstreetmap.org/wiki/DE:All_in_one_Garmin_Map#Technik You only need gmaptool and the right family and product ids in your "layers". :-) But I use SRMT, as I don't know how to use ASTER data. -Martin