[OSM-dev] Looking for guidance on interpreting multipolygon relations

[Martijn van Oosterhout]

On 11/3/07, bvh <bvh-osm at irule.be> wrote:
> > If you want to express that the water is a "hole" in the park, that
> > would make two multipoly relations, one with outer=A inner=B, one with
> > outer=B inner=C inner=D. Ideally the first relation would be tagged
> > leisure=park and the second would be natural=water but currently you
> > would be expected to tag the ways themselves (leading to double
> > tagging for B).
>
> I disagree violently with the double tag

Indeed. A way should only ever be tagged with what it is the outside
of.  The relation simply points to other polygons, whose only purpose
is to declare holes. You don't actually need any other information
about the inner polygons at all...

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