[mkgmap-dev] Bogus warnings about intersected ways in multipolygons

Mon Jan 25 22:29:21 GMT 2010

> The new MP code has a problem with inner polygons that touch the outer. 
>
> What you say makes me think that whenever the splitter splits an inner
> polygon it's going to cause trouble because it splits outers/inners
> along the same line so they will always intersect then.

There is more to it than that, because these hollow buildings in Montpellier
http://www.openstreetmap.org/?lat=43.60807&lon=3.89275&zoom=17&layers=B000FTF
also provoke the error message. They do not straddle the tile boundary
and the inner and outer do not touch. They do, however, appear to be rendered correctly. I say "appear" because this cannot be seen in
RoadTrip because it draws buildings and the background in exactly the
same colour, and even on my GPSr it is very hard to see because
buildings and background come out almost the same.