Frank, I solved those issues with specifying all the tiles now (100100*.img and 10101*.img) and ----lastcolstd, thanks! I still can't generate a map for the garmin device in Mapsource but I guess this issue has not been solved, right? ________________________________ Van: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> namens lig fietser <ligfietser@hotmail.com> Verzonden: maandag 30 oktober 2017 11:09:17 Aan: mkgmap-dev@lists.mkgmap.org.uk Onderwerp: Re: [mkgmap-dev] a new DEM-File Option Hmm sounds too complicated. I'm generating the DEM data again, I made a mistake in my settings, specifying only 100100*.* tiles but I also have 10101*.* tiles, this explains those missing DEM in a lot of tiles 😊 I'm trying now the ----lastcolstd and see of it works.