Frederik Ramm <frederik <at> remote.org> writes: > > Hi, > > Iván Sánchez Ortega wrote: > > If you want polygons to behave as in "paleo" GIS, you should refer to the > > industry standars. Specifically, to > > http://www.opengeospatial.org/standards/sfa , version 1.2.1, page 26: > > Agree with all, except that, for simplicity, we tend to make an > exception in ..... > +------------+ > | +--+--+ | > | | | | | > | +--+--+ | > +------------+
..... As well as in +----+---+----+ | | a | | | b | | | | +---+ | | | +-------------+ That is, the inner ring touching the outer ring in more than one point. That situation is a bit complicated to handle with OGC simple features. It would mean drawing an U-shaped "b" and a box shaped "a" and combining then into an OGC multipolygon with two outer rings. _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
