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Research OGC Spatial Operations Standard #164

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
Find the relevant OGC standard that defines spatial operations. See if the 
standard covers things line "point in polygon" and how to treat special cases 
like when the point lies on the boundary of the polygon.

We'll use these standards within PySAL to avoid creating yet another new 
standard.

Original issue reported on code.google.com by schmi...@gmail.com on 11 Aug 2011 at 6:32

GoogleCodeExporter commented 9 years ago 
The OGC Simple Features Standards defines a storage model and a set of spatial 
operations.  The spatial operations are based on a dimensionally extended 
nine-intersection model (DE-9IM).  Based on the DE-9IM matrix OGC names 5 
spatial predicates and provides a formal definition of each: Disjoint, Touches, 
Crosses, Within and Overlaps.

Also defined...
Contains is equal to Within
Intersects is the inverse of Disjoint

See Also....
http://www.opengeospatial.org/standards/sfa
http://en.wikipedia.org/wiki/DE-9IM

Original comment by schmi...@gmail.com on 16 Aug 2011 at 7:42