[postgis-users] how to create ouline of multiple objects

[Paul Ramsey]

select st_union(the_geom) from thetable;

On Thu, Aug 13, 2009 at 11:47 AM, G. van Es<gves2000 at yahoo.com> wrote:
> Hi All,
>
> Maybe a stupid question but I have a shape imported in PG of wich I want to determine the outline of all objects. The result should be a LINE or just one POLYGON.
>
> Does anyone know if this is possible in PG.
>
> Thanks,
>
> Ge
>
>
>
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