[OSM-newbies] Interior ring with Potlatch?

[Richard Weait]

On Wed, Dec 9, 2009 at 10:25 PM, David Fawcett <david.fawcett at gmail.com> wrote:
> I just added a building outline using Potlatch and drew a second area
> polygon to delineate an open area in the building.  I am not sure how
> to tie this second polygon to the first one to create the interior
> ring in the polygon.  When I drew them, I went clockwise with the
> exterior ring and counter-clockwise with the interior ring. I am not
> sure if this makes any difference.  Google didn't turn up any good
> answers.
>
> The building is at:
> http://www.openstreetmap.org/?lat=44.994395&lon=-93.30004&zoom=18

You'll want to create a relation
type=multipolygon
Make your ways members of the relation,
Then define the role=outer and role=inner for your two existing ways.

http://wiki.openstreetmap.org/wiki/Relation:multipolygon