Hi Felix, it should be easy to add an empty layer, but I'd prefer a special option for that. Any ideas for a good option name? I guess an empty layer would be one that contains only "unknown" or "undefined" heights. No idea what the device will do with such a layer, I'll try it. If I got you right you prefer to have no basemap on your device? Or maybe some devices don't have one by default? Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Felix Hartmann <extremecarver@gmail.com> Gesendet: Dienstag, 17. April 2018 11:50:42 An: Development list for mkgmap Betreff: [mkgmap-dev] Could mkgmap be extended to create an empty dem dist layer? If compiling DEM gmapsupp.img for device, right now it will show forever when zooming out - it would be good to have a fake/empty dem top layer - say --dem-dists=19884,39768,53024,212096 with 212096 being empty or just having enough data that the device is not actually shading the map? Basically I think dem on device is only useful from around 5-30km zoom levels (with default detail level). 5km is the lowest that the devices choose if DEM is on auto zoom level, but it will continue showing it indefinitely (at least if no basemap is activated) - so getting the device to show an empty dem to switch of shading would be pretty useful. Greetings Felix -- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich