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[mkgmap-dev] problems with rendering of long riverbank (multipolygons)

From WanMil wmgcnfg at web.de on Fri May 20 19:57:03 BST 2011

Thanks for your investigations.

I have an idea.

The automatic closing of polygons only closes single ways but does not 
check if the way could be closed by connecting it to another way. This 
is a bit tricky and I fear that there might be some side effects. But 
possibly it works.

I will try to implement a patch.


> Thanks Wanmil,
> I got this message in the log file:
> c:\Downloads\Benelux\10010046.osm.gz: Cannot join the following ways to closed polygons. Multipolygon http://www.openstreetmap.org/browse/relation/1424029
> On my map the Albert canal looks empty, except for the river in the centre. On the adjacent tiles west and east of tile 10010046, the Albert canal is filled with water again, because there the ends of the multipolygon are detected.
> I put the log file here:
> http://mijndev.openstreetmap.nl/~ligfietser/diverse/mkgmap.log.zip

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