[postgis-users] Scale

[Bob Pawley]

I want to scale a geometry of unknown size to the same size as a standard 
geometry.

ST_Scale(geometry, float8, float8) - this function does the job but the 
releative size needs to be known as a float8.

Is there a method of establishing the float8 by comparing the relative size 
of the two geometries. (I've looked at St_Difference but it just returns a 
geometry).

Bob