[mkgmap-dev] Anti-island check confused; defined a monster multipolygon

Sat Feb 6 16:49:57 GMT 2010

Marko,

> > 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.

OK.

> > If you still have the same data, could you try modifying containsPointsOf()
> > in Way.java so that it looks like this:

...

> 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

Hmm, I obviously don't understand what's going here. The problem is, I
can't picture what the layout of your tile is and how that lake
boundary looks. Can you put the osm data for that tile (compressed, of
course) somewhere so I can grab it?

Mark