On Dec 4, 2008, at 2:11 PM, Nicolas Ribot wrote:

Did I miss an obvious function, or is there something that will get what I
want?  hmmm, maybe a combination (but would that slow it down a lot)?


Hi William,

Did you try st_relate() the the appropriate DE-9IM matrix ?
I can't give you the pattern that will express your need exactly as I
read your email rapidely, but looking here may surely help:
http://postgis.refractions.net/documentation/manual-svn/ST_Relate.html
(also following the  intersectionPatternMatrix link)

This presentation may also help:
http://www.foss4g2007.org/presentations/view.php?abstract_id=117

Nicolas


I was wondering about that function. Unfortunately postgis 1.3 documentation doesn't have that handy link about the intersectionPatternMatrix that's in the svn documentation.

I'll look at that, thanks.

-----
William Kyngesburye <kyngchaos*at*kyngchaos*dot*com>
http://www.kyngchaos.com/

"Oh, look, I seem to have fallen down a deep, dark hole. Now what does that remind me of? Ah, yes - life."

- Marvin


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