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