Hi, I am back from a nice cycle trip to Sicilia. I did not yet investigate the problem in detail, but I can for sure say that I did not think about this situation when I wrote the code for the overview map creation. If nobody claims that mkgmap should support this I would also prefer to print an error message and stop processing. Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Steve Ratcliffe <steve@parabola.me.uk> Gesendet: Samstag, 18. Juni 2016 18:19 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] Error in mkgmap r-3676, wrong preview generation Hi An update on the problem. The contour line tiles have the levels 0:24,1:23,2:22,3:20,4:18 whereas the content tiles have levels of 0:24,1:22,2:20,3:18,4:16,5:15 The first tile encountered determines the levels in the overview map and so the overview maps are different. It is surely a bug that the map outlines are wrong and so I will look at this next. However I am not sure what the full solution is though as there are other noticable problems, as the overview map is going to be wrong for one set of tiles whatever is done. Perhaps mixing tiles with different levels should not be allowed? ..Steve _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev