[postgis-users] Many Funktions does not exist
Vinko Vrsalovic
vinko at cprsig.cl
Thu Nov 20 17:42:12 PST 2003
On Thu, Nov 20, 2003 at 02:16:44PM +0100, Michael Schiller wrote:
> Hello,
>
> there are many Funktions that does not exist.
>
> There are two Examples:
>
>
> SELECT equals(geom, GeometryFromText('POINT(0 0)', -1)) from test;
>
> ERROR: Function 'equals(geometry, geometry)' does not exist
> Unable to identify a function that satisfies the given argument
> types
> You may need to add explicit typecasts
>
>
> SELECT IsEmpty(geom) from test;
>
> ERROR: Function 'isempty(geometry)' does not exist
> Unable to identify a function that satisfies the given argument
> types
> You may need to add explicit typecasts
>
>
> I didn't know why this Funktion's doesn't exist. Other Funktion's how
> Distance, Envelope or Area can i
> use.
>
> I use postgis-0.7.4
To use those functions you need GEOS, and the latest postgis (cvs
version). You should carefully follow the README.postgis instructions on
how to build PostGIS with GEOS support.
--
Vinko Vrsalovic <el[|- at -|]vinko.cl>
http://www.cprsig.cl
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