Re: [mkgmap-dev] [PATCH] Creating contour lines from DEM data

A very good hint. The understanding of all discussions on the matter is that the current OSM licence does not allow mixing with CIAT data nor with ASTER data. So you cannot publish those maps. Could you elaborate on this? I would understand that e.g. the license of the ASTER data forbids publishing of derived work (although I haven't checked this). But is there really a point in the OSM license which forbids creating derived works (maps) which as an "add-on" contain features created from proprietary data sources?

Best wishes Christian