[postgis] truly_inside

[Dave Blasby]

Paul Ramsey wrote:
> 
> Nope, on the To Do list, definately, but not currently implemented.
> P.

mj_vermeij wrote:
> 
> Is there already a way to check whether polygon A intersects
> (overlaps) with polygon B? Both polygons can have arbitrary shapes.

On the contrary, you can use distance(POLY1,POLY2) = 0.
NOTE: this method isnt robust.  If the two geometries are really really
close (but not overlapping) you could get
a distance of 0. If they just barely barely overlap, you could get a
value just greater than zero.  


dave

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