[OSM-talk] Mysterious PostGIS Problem with Polygons

[John Smith]

--- On Sat, 22/8/09, Jon Burgess <jburgess777 at googlemail.com> wrote:

> In part it could be caused by invalid geometries. Postgis
> reports that
> only Polska is actually a valid polygon geometry. Any
> errors could upset
> algorithms like ST_Within().
> 
> gis=> select name,isvalid(way) from planet_osm_polygon
> where
> boundary='administrative' AND admin_level='2' AND name in
> ('Deutschland','Danmark','Polska','Nederland','Australia','Italia');
> NOTICE:  Hole lies outside shell
>     name     | isvalid
> -------------+---------
>  Australia   | f

Is Australia listed as false because the polygon used doesn't just cover Australia but 4 or so external territories? These are islands in the Pacific and Indian Oceans.