[postgis-users] difference between contains and within

[Martin Davis]

They are inverses of one another.    contains(A, B) = within(B, A)

Dave Potts wrote:
> I trying to work out the number of points that spaitially inside a 
> polygon, looking at the manual there are two functions that seem to do 
> the right thing, contains and within.
>
> Q. Whats the difference between the two functions?
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-- 
Martin Davis
Senior Technical Architect
Refractions Research, Inc.
(250) 383-3022