Hi Mark,
Hmm, I wonder if the test to see if an anti-island is contained within an island is failing if the anti-island reaches a tile edge.
That is a possibility. It would not be the splitter tile edge, but the edge of the Geofabrik extract. The mapped coastline of lake Inari intersects with the Finnish-Russian border (something that I was not aware of), and the border polygons of Geofabrik can easily be a few km off.
If you still have the same data, could you try modifying containsPointsOf() in Way.java so that it looks like this:
public boolean containsPointsOf(Way other) { Polygon thisPoly = new Polygon(); for(Coord p : points) thisPoly.addPoint(p.getLongitude(), p.getLatitude()); for(Coord p : other.points) if(thisPoly.contains(p.getLongitude(), p.getLatitude())) return true; return false; }
i.e. make it return true if any point is inside rather than all points are inside.
Done. I get the very same warnings: 2010/02/06 18:37:01 WARNING (Osm5XmlHandler): 63240003.osm.gz: Converting anti-island starting at http://www.openstreetmap.org/?mlat=68.79379&mlon=27.95413&zoom=17 into an island as it is surrounded by water 2010/02/06 18:37:01 WARNING (Osm5XmlHandler): 63240003.osm.gz: Converting anti-island starting at http://www.openstreetmap.org/?mlat=69.41525&mlon=28.71751&zoom=17 into an island as it is surrounded by water 2010/02/06 18:37:02 WARNING (Osm5XmlHandler): 63240003.osm.gz: Converting anti-island starting at http://www.openstreetmap.org/?mlat=66.56882&mlon=27.78983&zoom=17 into an island as it is surrounded by water Best regards, Marko