[mkgmap-dev] Tile boundary artefacts

Fri Apr 2 12:13:19 BST 2010

> I have attached an interesting screenshot from my Oregon 400t. The map
> is the All in one map Europe
> (http://wiki.openstreetmap.org/wiki/All_in_one_Garmin_Map).
>
> You see that the light grey industrial area is splitted by a
> considerable yellow line. But the dark grey buildings do not have it
> although they are splitted by the tile bounds in the same manner. There
> is no multipolygon defined in the screenshots area.
>
> Maybe the boundary clipper sometimes cuts too much?
>
> I have never seen such artefacts on original garmin maps.
>
> WanMil
>

I have checked the results of the AreaClipper and issued a warning in 
case one of the clipped polygons was not touching the clipped area. I 
found some but all of them were self intersecting polygons that were cut 
by the java Area class used by the AreaClipper.

So that's not the source of the problem. Any other idea?

WanMil