[mkgmap-dev] Polygon with barrier problem

Mon Jan 25 20:47:31 GMT 2010

> WanMil wrote:
>> What do you mean with "tagging the 'inner' of a multipolygon"? I have
>> reimplemented the whole mulitpoylgon code so I am very interested in
>> problems that still exist.
>>
>> Can you give a relation id which makes problems?
> I'm using r1505 on an Oregon 300 using the latest firm/software.
>
> http://www.openstreetmap.org/browse/relation/383291
>
> With these tags added to the inner relation the void doesn't fully show
> on the Garmin. There is a thin slit where it should be a sort of sausage
> shape.
>      <tag k='name' v='River Avon' />
>      <tag k='waterway' v='riverbank' />
>
> Because there's that slit it's as if with those tags, the inner polygon
> has been some width.
>
> If I remove them it works.
>
> I thought it might be because I also had waterway=river, width=15 but by
> using an extraction of OSM&  deleting those ways manually from the XML
> data, I verified that wasn't the cause.
>
> Cheers
> Dave F.
>

Dave,

I compiled a map using default style that covers the relation. There 
were no problems with the relation (the island shows as big as expected 
on my Oregon). But http://www.openstreetmap.org/browse/way/37737680 
overlaps the river and produces a very wide bridge.
This is either a data or a style problem.
As far as I could see the multipolyon code works as expected.

WanMil