I discovered a new bug in mkgmap - see below copy from cmd.exe: I think this is related to the changes of the bbox or arc length... Extracting norway.osm cache= description= geonames-file=cities15000 legacy-mode=false mapid=64010000 max-areas=128 max-nodes=1300000 mixed=false overlap=2000 resolution=13 split-file= write-kml=testkml Time started: Sun Nov 08 23:33:14 CET 2009 Map is being split for resolution 13: - area boundaries are aligned to 0x800 map units - areas are multiples of 0x1000 map units wide and high The input osm file(s) will be re-parsed during the split (slower) because no --cache parameter was specified Processing norway.osm 2.500.000 nodes processed... A total of 3.389.190 nodes, 0 ways and 0 relations were processed in 1 file Min node ID = 110 Max node ID = 559167509 Time: Sun Nov 08 23:33:27 CET 2009 Exact map coverage is (57.715086936950684,4.018828868865967) to (71.18604183197021,31.168577671051025) Rounded map coverage is (57.7001953125,3.9990234375) to (71.2353515625,31.2451171875) Splitting nodes into areas containing a maximum of 1.300.000 nodes each... 4 areas: Area 64010000 covers (0x290800,0x36800) to (0x2af800,0x72800) NO-Bergen Area 64010001 covers (0x2af800,0x2d800) to (0x2e1800,0x72800) NO-Alesund Area 64010002 covers (0x299800,0x72800) to (0x2ce800,0x92800) NO-Oslo Area 64010003 covers (0x2ce800,0x72800) to (0x32a800,0x163800) NO-Trondheim Writing KML file to testkml Writing out split osm files Sun Nov 08 23:33:27 CET 2009 Processing 4 areas in a single pass Starting pass 1 of 1, processing 4 areas (64010000 to 64010003) Processing norway.osm 2.500.000 nodes processed... Writing ways Sun Nov 08 23:33:57 CET 2009 Writing relations Sun Nov 08 23:34:05 CET 2009 Wrote 3.389.190 nodes, 194.053 ways, 678 relations Time finished: Sun Nov 08 23:34:05 CET 2009 Total time taken: 51s 23:34:05 SCHWERWIEGEND (RoadNetwork): Road null (OSM id 35563670) contains zero length arc SCHWERWIEGEND (RoadNetwork): http://www.openstreetmap.org/?lat=59.75500&lon=8.14164&zoom=17 *java.lang.AssertionError: deltaLong = -37306* at uk.me.parabola.imgfmt.app.trergn.MapObject.setDeltaLong(MapObject.java:136) at uk.me.parabola.imgfmt.app.trergn.MapObject.setLongitude(MapObject.java:125) at uk.me.parabola.imgfmt.app.trergn.LinePreparer.calcLatLong(LinePreparer.java:176) at uk.me.parabola.imgfmt.app.trergn.LinePreparer.<init>(LinePreparer.java:62) at uk.me.parabola.imgfmt.app.trergn.Polyline.write(Polyline.java:165) at uk.me.parabola.imgfmt.app.trergn.RGNFile.addMapObject(RGNFile.java:130) at uk.me.parabola.imgfmt.app.map.Map.addMapObject(Map.java:242) at uk.me.parabola.mkgmap.build.MapBuilder$LineAddFilter.doFilter(MapBuilder.java:1002) at uk.me.parabola.mkgmap.build.LayerFilterChain.doFilter(LayerFilterChain.java:57) at uk.me.parabola.mkgmap.filters.RemoveEmpty.doFilter(RemoveEmpty.java:61) at uk.me.parabola.mkgmap.build.LayerFilterChain.doFilter(LayerFilterChain.java:57) at uk.me.parabola.mkgmap.filters.LineSplitterFilter.doFilter(LineSplitterFilter.java:60) at uk.me.parabola.mkgmap.build.LayerFilterChain.doFilter(LayerFilterChain.java:57) at uk.me.parabola.mkgmap.build.LayerFilterChain.startFilter(LayerFilterChain.java:75) at uk.me.parabola.mkgmap.build.MapBuilder.processLines(MapBuilder.java:862) at uk.me.parabola.mkgmap.build.MapBuilder.makeSubdivision(MapBuilder.java:643) at uk.me.parabola.mkgmap.build.MapBuilder.makeMapAreas(MapBuilder.java:578) at uk.me.parabola.mkgmap.build.MapBuilder.makeMap(MapBuilder.java:187) at uk.me.parabola.mkgmap.main.MapMaker.makeMap(MapMaker.java:96) at uk.me.parabola.mkgmap.main.MapMaker.makeMap(MapMaker.java:61) at uk.me.parabola.mkgmap.main.Main$1.call(Main.java:190) at uk.me.parabola.mkgmap.main.Main$1.call(Main.java:188) at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Exiting - if you want to carry on regardless, use the --keep-going option 23:35:23