[postgis-users] St_Expands

[Paul & Caroline Lewis]

Hi All,

    I need to generate a bounding box geometry around a point and St_Expands seem to be heading in the right direction. However, I need to create it to different dimensions in each axis. Currently, as I understand it ST_Expands(point_geom, 10) will return me a bounding box extended 10 geometry units in the x, y and z axis. I would like to be able to do ST_Expands(point_geom, 10, 8, 6) where it extends 10 units in X, 8 in Y and 6 in Z. Can anyone recommend how this might be done with the current PostGIS 1.5 functions toolset, I cannot thing of one at present, otherwise can anyone point me in the right direction to a tutorial on how I might extend this function from scratch in the current source code and re-compile it locally.

 

Thanks in advance,

 

Paul
 		 	   		  
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