On 11 September 2013 10:56, Jean Marchal <[email protected]> wrote: > Dear PostGIS users, > > <snip> > > Returns FALSE instead of TRUE, same thing for hundreds of polygons. Is it > just me or everyone get same result ? > > I tried with postgis 2.1 and 2.1.1dev > > My guess is it's not only ST_Overlaps() but some underlying function called > by ST_Overlaps()
This is the expected result. It returns true for ST_Covers, which means one of the geometries is completely contained in the other, so by definition it is false for ST_Overlaps. Maybe you are looking for a different spatial predicate? I'd recommend putting these geometries in JTS test builder to get a visual reference for how the spatial predicates actually work. Also see https://en.wikipedia.org/wiki/DE-9IM -Mike _______________________________________________ postgis-users mailing list [email protected] http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users
