Hi Andrzej, hmm, still not much success. It seems that my problem is caused by the DEM data of the overview map. Garmins "Winterkarte" doesn't have an overview map, right? Maybe I have to write an additonal 0x4a polygon for the overview map itself? Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Gerd Petermann <gpetermann_muenchen@hotmail.com> Gesendet: Freitag, 12. Januar 2018 21:35:18 An: Development list for mkgmap Betreff: Re: [mkgmap-dev] what do the 0x4a polygon in the mean? Hi Andrezj, okay, I'll try again tomorrow. Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Andrzej Popowski <popej@poczta.onet.pl> Gesendet: Freitag, 12. Januar 2018 20:36:03 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] what do the 0x4a polygon in the mean? Hi Gerd, have you remembered to press Ctr-G twice? ;) I'm sure that you can get expected result. Detailed tile should have its background 4B clipped and the same shape should be used for 4A and 4B of overview map. I'm attaching a screenshot from a map created with cGPSmapper and with DEM supplied by BuildDEMFile. See, that background of detailed tile is the limit of DEM shading and also shown as a selection for map transfer. -- Best regards, Andrzej _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev