Hi Ticker, I tried to reach you with a PM but that was returned, so I try again via list... Gerd ________________________________________ Von: Gerd Petermann Gesendet: Mittwoch, 1. Februar 2017 16:09 An: Ticker Berkin Betreff: Please help Hi Ticker, I try to understand why ShapeSplitter complains about a polygon created by my new algo. Attached is a patch and an input file. Command: java -Dlog.config=mkgmap_log.props -ea -jar dist\mkgmap.jar f:\osm\test.osm.pbf My mkgmap_log.props contains .level=WARNING and I see this warning: WARN: uk.me.parabola.util.ShapeSplitter f:\osm\test.osm.pbf: Direction of shape and hole conflict; probably self-intersecting polygon this: fp=146086642 lp=146173971 area=19324813903 #=134 http://www.openstreetmap.org/?mlat=48.975820&mlon=13.355620&zoom=17 http://www.openstreetmap.org/?mlat=48.988628&mlon=13.389160&zoom=17 other: fp=146153055 lp=146161739 area=22313626 #=6 http://www.openstreetmap.org/?mlat=49.002597&mlon=13.353453&zoom=17 http://www.openstreetmap.org/?mlat=49.003250&mlon=13.352696&zoom=17 I don't see what's wrong here. Gerd