[postgis-users] intersectionPatternMatrix documentation request

Martin Davis mbdavis at refractions.net
Mon Jun 16 09:01:14 PDT 2008

You can also look at the OGC SFS document #99-049

or here:

Also, the JTS Javadoc has a lot of information on this, in the classes 
Geometry and IntersectionMatrix

Webb Sprague wrote:
> Is there a graphic that shows the various possible intersection
> matrices that can be yielded from a "relate()" call?  A link to the
> spec, a picture, and an accompanying table would be, to my lights,
> VERY useful additions to the standard docs.
> I realize that they are out there in cyberspace somewhere, but it is a
> pain in the neck to find them even with Google, and a summary graphic
> is all I really want.  I would recommend an Appendix B in the main
> docs.
> I would offer to write this up, but I don't know much about it.
> Thoughts
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Martin Davis
Senior Technical Architect
Refractions Research, Inc.
(250) 383-3022

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