The OGC SFSQL document says that
A.Within(B) implies Insersection(A,B) == A
And Contains is just defined for commutative purposes against Within():
A.Within(B) implies B.Contains(A).
So, you might not like the semantics, but they are implemented as
defined by the standards body.
Paul
Todd Jellett wrote:
It turns out that this is also the case for identical geometries!
If you take just GeomA and run all the listed binary predicates (below)
against itself, you get exactly the same as below.
Running GeomA->GeomA I get:
Disjoint False
Equal True
Touch False
Contain True
Within True
Overlap False
Running a simple geometry against itself should return True for Equals
*only*. It is ambiguous to be also contained and within.
Todd
--
Paul Ramsey
Refractions Research
http://www.refractions.net
[EMAIL PROTECTED]
Phone: 250-383-3022
Cell: 250-885-0632
_______________________________________________
geos-devel mailing list
geos-devel@geos.refractions.net
http://geos.refractions.net/mailman/listinfo/geos-devel
