Hi everyone, I noticed that the DEM layer if created for resolution 23 only (with a map that has not 24 resolution) will only be half the size of the DEM in resolution 24 (dem-dist=3312) - however in Basecamp/Mapsource the detail is virtually identical - I cannot see any difference in quality. So I think there must be some way to still save a lot of data/space - but it's not by going for dem-dits=6624 - that will result in much worse DEM detail. (I still really haven't found a good solution for DEM on GPS devices though. Need more time trying out different values and possibilities. Right now I think best is probably a separate transparent but except for DEM empty DEM only gmapsupp.img). -- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich