[OSM-talk] Best way to draw areas with holes?

[Martijn van Oosterhout]

On Dec 20, 2007 11:44 PM, Alex Mauer <hawke at hawkesnest.net> wrote:
> > I have used the multipolygon relation to draw islands in rivers.  It is specifically intended for drawing holes in areas and worked very well for me.
> >
>
> I've tried to use it for this, but I run into problems when the river
> bank is too large for a single way.  (I split the ways at 129 nodes, but
>  the exact number doesn't matter)

"polygon with holes" and "splitting outside into peices because it's
too long" are incompatable, you either do one or the other. A
riverbank has to be a single closed polygon, the only area feature
exempt from this rule is "natural=coastline".

TBH, I'd forget the multipolygon stuff and draw the islands as
natural=land or some such...

Have a nice day,
-- 
Martijn van Oosterhout <kleptog at gmail.com> http://svana.org/kleptog/