I'm trying to make a map of coastal vegetation in north Brazil: http://www.openstreetmap.org/?lat=-0.92649&lon=-46.66564&zoom=16&layers=B000FTF
I used multipolygons to specify adjacent wetland types (natural=wetland + wetland=mangrove/wetland=marsh) and neighbouring terrestrial forest, tagging the relations, not the ways. Terrestrial forests are on "islands" within marshes and mangroves (the mapnik map of www.openstreetmap.org does not differentiate between wetland=marsh and wetland=mangrove). The rendering on the main site works somehow, but, for example, the south-eastern forest islands and surrounding marshes receive an extra cover of the wetland pattern. Unfortunately, I haven't been able to figure out the error. Does anybody see whether this is a tagging/relation-building error of mine, or whether this is just due to limitations of the current renderers? I think it might be rather a rendering problem, because mapnik gets it apparently right on my computer (see attached PNG tile). Thanks for your help! Ulf -- Ulf Mehlig <ulf.meh...@gmx.net> ----------------------------------------------------------------------
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