[OSM-talk] Islands

[Robert (Jamie) Munro]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Artem Pavlenko wrote:
> 
> 80n,
> We don't really need all this crossing segments.
> Please, could you explain to me what's wrong with representing features
> like 'river with islands' as proper polygons (one exterior and
> n-interior rings) ? If you want just a small part of a bigger polygon
> for rendering use _clipping_. 

The problem is that none of our existing editors can cope well with
editing a way that is big and complicated e.g. the whole river Thames as
a single polygon. If it's multiple polygons, we need a way to join them,
which is the crossing segments. It's a similar problem to coastlines.

Robert (Jamie) Munro
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (Darwin)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFGI1USz+aYVHdncI0RAlVMAJ9+gFeB0q23jLQFlyBHhXfZVod5ygCdGj9F
r9qMkGs42vUjaOTn7zJsS6k=
=fMVf
-----END PGP SIGNATURE-----