Hi Andrzej, see http://files.mkgmap.org.uk/download/390/OSM%20map.gmap.zip The map was created with your data, the attached experimental patch and options --dem-poly=e:\baddem\poland.poly --dem=e:\baddem\SRTM --code-page=1252 --dem-dists=9942 --overview-dem-dist=30000 --gmapi --show-profiles=1 --preserve-element-order e:\baddem\29483085.osm.pbf If you use it as is the DEM data of the overview map overlaps the 0x4a polygon. If you rename or remove OSM map.gmap\Product1\osmmap\63240000.DEM the result looks quite good. Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Andrzej Popowski <popej@poczta.onet.pl> Gesendet: Samstag, 13. Januar 2018 13:04:23 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] what do the 0x4a polygon in the mean? Hi Gerd, I don't think that any changes in overview are needed. If you zoom into detailed map, then overview is unimportant. I have installed Winter Activity Map in Mapsource using GMapTool. The overview map is very simplified, it contains objects 4A and 4B as rectangles and no DEM. Still I can see clipped shading and irregular borders for selecting maps. Could you upload your examples? -- Best regards, Andrzej _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev