[postgis-users] st_intersects() returns false with point and polygon that obviously intersect

[Craig de Stigter]

Thanks for the confirmation. Created
#845<http://trac.osgeo.org/postgis/ticket/845>

On Thu, Feb 24, 2011 at 9:41 PM, Sandro Santilli <strk at keybit.net> wrote:

> On Thu, Feb 24, 2011 at 09:35:44AM +0100, Sandro Santilli wrote:
> > On Thu, Feb 24, 2011 at 12:58:24PM +1300, Craig de Stigter wrote:
> > > Hi list
> > >
> > > This query returns false, but the box and point intersect:
> > >
> > > select st_intersects('POINT(169.69960846592
> -46.5061209281002)'::geometry,
> > > > 'POLYGON((169.699607857174 -46.5061218662,169.699607857174
> > > > -46.5061195965597,169.699608806526 -46.5061195965597,169.699608806526
> > > > -46.5061218662,169.699607857174 -46.5061218662))'::geometry);
> > > >  st_intersects
> >
> > Does sound like a bug:
> >
> >  st_relate | st_intersects | st_disjoint
> > -----------+---------------+-------------
> >  0FFFFF212 | f             | f
> >
> > ST_Relate is correct, ST_Disjoint is correct, ST_Intersects is _wrong_
> >
> >    I B E
> >    -----
> >  I 0 F F
> >  B F F F
> >  E 2 1 2
> >
> > Could you please file a bug for this ?
> >  http://trac.osgeo.org/postgis
>
> For the record: the GEOS side is fine, so must be some shortcut in postgis.
>
> --strk;
>
>  ()   Free GIS & Flash consultant/developer
>  /\   http://strk.keybit.net/services.html
>



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