[OSM-dev] Osmosis: Extracting by polygon

Karl Newman siliconfiend at gmail.com
Tue Feb 3 14:57:58 GMT 2009

On Tue, Feb 3, 2009 at 6:23 AM, Rolf Bode-Meyer <robome at gmail.com> wrote:

> 2009/2/3 Brett Henderson <brett at bretth.com>:
> > Check the definition of "insideness" in the above link, just because a
> point
> > lies on the boundary doesn't necessarily mean it will be considered
> "inside"
> > the shape.
> Reading that and comparing the results I see they're matching. So I
> comprehend what's going on.
> But I must confess I don't agree that this is going on (though that
> won't help anything I guess). Either one counts the whole border as
> being part of the result or none of it. But ok, in my case having the
> whole border-defining-multipolygon inside it's a minor issue.
> Having said that. Would it be hard to make osmosis close polygons it
> cut appart along the bounding polygon? I know there's completeWays,
> but that would include too much.

Osmosis doesn't know that it's a polygon, so it can't close it. It's only a
polygon because the tags say it is (polygon is not a fundamental primitive
object in OSM), and Osmosis is tag-agnostic.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/dev/attachments/20090203/3e638c11/attachment.html>

More information about the dev mailing list