[OSM-newbies] Adding a cul-de-sac to an existing street

[Steve Bennett]

On Fri, Aug 20, 2010 at 10:51 AM, Richard Weait <richard at weait.com> wrote:
> OSM expects a 'way' to be either a line, or a simple, closed polygon.
> Self-crossings, bifurcations and self-intersections other than a
> simple closed polygon are errors.

Interesting, I didn't know that. Potlatch behaves badly when dealing
with self-intersections (ie, a P shape) but I didn't realise that it
wasn't supported in OSM in general.

Steve