Hi WanMil,
I downloaded the finland OSM dump from geofabrik from today (Feb 15th). I used splitter v105 and the areas.list file from http://www.polkupyoraily.net/osm/ to get three tiles. Then I tried that patch: * I got no warning for mp 404644 * I got only one "unknown reason" warning for complete finland
What did you see above the "unknown reason" warning? I saw this when using yesterday’s dump and your patch applied on top of mkgmap r1569 (IIRC): 2010/02/14 21:52:08 WARNING (MultiPolygonRelation): 63240001.osm.gz: Multipolygon http://www.openstreetmap.org/browse/relation/404644 contains errors. 2010/02/14 21:52:08 WARNING (MultiPolygonRelation): 63240001.osm.gz: Polygon 4611686018427397822(178P : (23045442[43P],19548137[36P],19560742[66P],25581658[35P]) is not processed due to an unknown reason. With today’s dump and mkgmap r1571, I see no such warning. I did not see a warning either with yesterday’s dump and r1569 (IIRC).
Apart from improving handling on the tile boundaries (which will be another main patch) I don't see anything to improve. Did you really use the patch?
I think I did. I just retried mp_linesoverlapping_v4.patch with today’s dump, and sure enough, I do see the 'unknown reason' warning that I thought was for relation 404644: 2010/02/15 21:41:07 WARNING (MultiPolygonRelation): 63240001.osm.gz: Cannot join the following ways to closed polygons. Multipolygon http://www.openstreetmap.org/browse/relation/404644 2010/02/15 21:41:07 WARNING (MultiPolygonRelation): 63240001.osm.gz: - way: http://www.openstreetmap.org/browse/way/25581758 2010/02/15 21:41:08 WARNING (MultiPolygonRelation): 63240001.osm.gz: Multipolygon http://www.openstreetmap.org/browse/relation/404644 contains errors. 2010/02/15 21:41:08 WARNING (MultiPolygonRelation): 63240001.osm.gz: Polygon 4611686018427397822(178P : (23045442[43P],19548137[36P],19560742[66P],25581658[35P]) is not processed due to an unknown reason. 2010/02/15 09:59:56 WARNING (MultiPolygonRelation): 63240002.osm.gz: Multipolygon http://www.openstreetmap.org/browse/relation/404644 does not contain any way tagged with role=outer. OK, without the patch, I see one warnings for 404644 in 63240001.osm.gz and two in 63240002.osm.gz, most likely due to incorrect splitting. Here is the warning for 63240001.osm.gz: 2010/02/15 09:59:12 WARNING (MultiPolygonRelation): 63240001.osm.gz: Cannot join the following ways to closed polygons. Multipolygon http://www.openstreetmap.org/browse/relation/404644 2010/02/15 09:59:12 WARNING (MultiPolygonRelation): 63240001.osm.gz: - way: http://www.openstreetmap.org/browse/way/25581758 Can you figure out what is behind the 'unknown reason' if it is not the incorrectly split relation 404644? Marko