Hi Andrzej, maybe you are right. With r4467 I've only relaxed the test for the polish reader. The style check was introduced in r2932 in 2014. I found this discussion about 0x4a: http://gis.19327.n8.nabble.com/polygon-type-0x4a-tt5761430.html I think I mixed the meaning of 0x4a and 0x4b then but the source still contains comments where 0x4a is called a "background polygon". Unfortunately I didn't find a good reason why the change in r2932 also added the check for 0x4a polygons. Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Andrzej Popowski <popej@poczta.onet.pl> Gesendet: Samstag, 14. März 2020 20:24 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] Polygon 4A in mp sources Hi Gerd, preview compiled with r4436 works correctly. You probably can relax the check for all readers. Polygon 0x4A needs some extra care, when mkgmap creates its own preview map, but I don't think it is dangerous in a detailed tile. -- Best regards, Andrzej _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev