Hi Andrzej, ah, okay, so I looked at the DEM data created by GMapTool. I already wondered where this came from ;-) So forget those findings for Winter Activity Map. Still, Adria map seems to use the same trick, just not so strange values. Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Andrzej Popowski <popej@poczta.onet.pl> Gesendet: Sonntag, 14. Januar 2018 11:49:24 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] what do the 0x4a polygon in the mean? Hi Gerd, do you have overview for Winter Activity Map? I have never seen Winter map for PC, only gmapsupp.img. Maybe it is an overview created by GMapTool, check copyright in TRE. I have included procedure for creating empty DEM in GMapTool, which is using different distances. Actually it used to create too big area of DEM, I have just released correction. You shouldn't use it as reference. -- Best regards, Andrzej _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev