On Thu, Apr 17, 2008 at 12:15:16AM +0200, Frederik Ramm wrote: > Hi, > > > The only exceptions apparently > > being that self-intersecting polygons are allowed in OSM. > > The wiki page you cited says "In general, a 2D geometry is simple if > it contains no self-intersection." - what do they mean by "2D > geometry"? Specifically, would a self-intersecting *line* be allowed? > (I like to think of points as 0D, lines as 1D, and areas as 2D but I > have a feeling the GIS people might view this differently?)
"Geometry in a 2 dimensional plane." In a 2 dimensional plane, all geometries are 2d, because you specify their coordinates in two dimensions. Regards, -- Christopher Schmidt MetaCarta _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
