[postgis-users] St_within problem

[Bob Pawley]

Hi

I have a table consisting of 858 points which spatially covers a geometry.

I want to pick out the points that are spatially within that geometry.

I am using the following but it returns a null (empty?) value. 

 select st_astext(graphics.point_grid.the_geom)
 from graphics.point_grid, library.dgm_process
 where library.dgm_process.process_number = '1' 
 and st_within(graphics.point_grid.the_geom, library.dgm_process.the_geom);

Any thoughts would be appreciated.

Bob
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