[postgis-users] Extents

[strk at refractions.net]

On Fri, Oct 14, 2005 at 09:19:38PM -0400, René F. Viancos S. wrote:
> Try with:
> 
> SELECT BOUNDARY(the_geom) From trails_02a
> WHERE objectid = 1 AND objectid = 2 AND objectid = 3;

                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Don't try boundary(), your condition is an always-false one.
(just in case someone falls on this mail from the archive)
--strk;

> 
> best regards
> 
> 2005/10/14, Sean M. Montague <smontague at atsdenver.com>:
> >
> >
> > I need to return the extent or multiple geometries, I tried the below
> > statement, but it returned nothing. Is there a way to return the extent
> > of the combined extents? Thanks
> >
> > Sean
> >
> > SELECT EXTENT(the_geom)
> > >From trails_02a
> > WHERE objectid = 1 AND objectid = 2 AND objectid = 3;
> > _______________________________________________
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> > postgis-users at postgis.refractions.net
> > http://postgis.refractions.net/mailman/listinfo/postgis-users
> >
> 
> 
> 
> --
> René F. Viáncos S.
> Director de Geomática y TIC
> Vicerrectoría de Investigación y Desarrollo
> Universidad de Chile
> Tel (56-2) 632 51 15
> Cel (56 9) 933 72 66
> rviancos at uchile.cl
> rviancos at gmail.com
> www.investigacion.uchile.cl <http://www.investigacion.uchile.cl>

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