Hi Michael, okay, I can reproduce the problem. I assume it is caused by the code which subtracts the inner area from the multipolygon area. No idea if this can be fixed easily. Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Forstner Michael <forstner-m@a1.net> Gesendet: Dienstag, 26. September 2023 19:44 An: 'Development list for mkgmap' Betreff: Re: [mkgmap-dev] Gaps in surfaces Hello Gerd, here is the area: https://www.openstreetmap.org/#map=19/48.57117/13.96920 I understand that it is necessary to make rounding. If a point of two surfaces is equal in OSM, the point should also be equal in Garmin. Thank you! Best regards, Michael _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk https://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev