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

Mon Sep 5 20:57:36 BST 2011

Hello,

I've a problem with a riverbank (http://www.openstreetmap.org/?lat=52.82591&lon=12.07255&zoom=16&layers=M)
When looking at my map on the Garmin or Basecamp I can see the islands (http://img820.imageshack.us/img820/1363/931.png), but when zooming in, they are gone(http://img202.imageshack.us/img202/6453/926.png).
Also when I point to the island I get the name, but after zooming I get the name of the river. What's wrong?!

Cheers,
Martin

Am 20.05.2011 um 20:57 schrieb WanMil:

> 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.
> 
> WanMil
> 
> 
> 
>> 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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