Hi all, attached is a first working version of the patch, please test it with your style. I've also uploaded a binary: http://files.mkgmap.org.uk/download/277/mkgmap.jar It implements two new options: --x-fix-sharp-angles (I plan to remove this option when the code is ready, I now think the fixing should always be enabled) Is needed to activate the new code. --x-cycle-map Should be used when the map is only usable for cycling and walking, means, all vehicles (except foot) are treated like bicycles. (like with styles from Minko or Felix) The patch also removes the code for the option --adjust-turn-headings. The important code is in a new class AngleChecker, when you want to see what it does you should enable logging on info level like this: uk.me.parabola.imgfmt.app.net.AngleChecker.level=INFO When you find a message like ... sharp angle 28° at 38.343434,-0.770673 headings 40° 68° speeds 2 2 dest nodes 311 2103 followed by ... sharp angle 28° at 38.343434,-0.770673 changing arc with heading 68° -> 85° angle is now 45° you may want to compare the routing results for that location, once with and once without the option. (In Basecamp and Mapsource you can use Ctrl+T to jump to the location printed in the msg) While testing the code I found one problem in OSM data: Sometimes roads are duplicated, means, one road (or a part of it) hides the other. I consider this as a potential error in the OSM data, so a warning like this is produced: WARN: uk.me.parabola.imgfmt.app.net.AngleChecker 63240007.o5m: sharp angle < 1° at 38.355308,-0.483420 ,maybe duplicated OSM way with bearing 359° The message doesn't contain any OSM Id because often the available Ids are missleading due to the merging of roads. I use JOSM to fix these errors: Use Ctrl+J to jump to the given position (38.355308,-0.483420) and download a small area around the point. Next, use Alt+left mouse click multiple times on the node to see the connected roads. Gerd