I pushed a commit to main branch always returning false. Same on the PostGIS side, but I don't know up to which version I should backport that. If you have old versions around, could you please leave a comment in https://trac.osgeo.org/postgis/ticket/5008 ?
--strk; On Mon, Oct 04, 2021 at 07:56:34PM +0300, Darafei "Komяpa" Praliaskouski wrote: > Points on infinite distance are still on the extended R2+ plane. The empty > points aren't. > > This one should be "always false", and make sure that "POINT(INF INF)" is > at INF distance from anything (can be true). POINT(Inf Inf) != POINT(NaN > NaN) in this aspect. > > On Mon, Oct 4, 2021 at 6:50 PM Paul Ramsey <pram...@cleverelephant.ca> > wrote: > > > https://trac.osgeo.org/postgis/wiki/DevWikiEmptyGeometry > > > > > > pramsey=# select st_distance('POINT(1 1)','POINT EMPTY'); > > st_distance > > ------------- > > > > (1 row) > > > > Interesting note in the wiki about returning NULL for DWithin. > > > > Current behaviour. > > > > pramsey=# select st_dwithin('POINT(1 1)','POINT EMPTY', 1); > > st_dwithin > > ------------ > > f > > (1 row) > > > > pramsey=# select st_dwithin('POINT(1 1)','POINT EMPTY', 'Inf'::float8); > > st_dwithin > > ------------ > > t > > (1 row) > > > > I could see going for "always false" since we're almost there for non-inf > > values. > > > > P > > > > > On Oct 4, 2021, at 8:08 AM, Sandro Santilli <s...@kbt.io> wrote: > > > > > > On Mon, Oct 04, 2021 at 05:02:24PM +0200, Sandro Santilli wrote: > > >> I'd think yes, honestly, but the current code returns TRUE sometimes, > > >> particularly for MAXDISTANCE being Infinite... > > >> > > >> As I think GEOS is not being used by phylosophers, I can't find any > > >> reason why would anyone want a TRUE result from a DistanceWithin() > > >> query involving an EMPTY geometry. > > > > > > We have the same issue on PostGIS: > > > https://trac.osgeo.org/postgis/ticket/5008 > > > > > > --strk; > > > _______________________________________________ > > > geos-devel mailing list > > > geos-devel@lists.osgeo.org > > > https://lists.osgeo.org/mailman/listinfo/geos-devel > > > > _______________________________________________ > > geos-devel mailing list > > geos-devel@lists.osgeo.org > > https://lists.osgeo.org/mailman/listinfo/geos-devel > > > _______________________________________________ > geos-devel mailing list > geos-devel@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/geos-devel -- Libre GIS consultant/developer https://strk.kbt.io/services.html _______________________________________________ geos-devel mailing list geos-devel@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/geos-devel
