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
Marko, if you want to know exactly what's happening please start mkgmap with debug-level FINE. I don't do anything else. I am happy for any good hint what might be a problem. But I don't investigate every warning of the mp code. WanMil