Bruce Rindahl wrote:
3. Is there any way to get the corners of a polygon or its bounding box out
as
separate points?
See the documentation on xmin, xmax, ymin, ymax
What documentation? In http://postgis.refractions.net/docs/ch06.html, all I
can find is "ST_xmin(box3d)". But experimentation shows I can call 'xmin()'
with a geometry, and 'st_xmin()' doesn't exist.
This is what I find so frustrating about the PostGIS documentation. There are
all these functions documented as "ST_*" but it turns out that in order to use
some of them, you actually have to leave off the "ST_" part. This function is
defined as requiring a box3d, but nothing I can find in the docs actually
comes out and says that if you have a method that takes a box3d, you can call
it with a geometry and it will use the bounding box (ok, it does come out and
say that for the && operator, but it doesn't say it's true in general).
I'm really trying to read the manual before asking dumb questions, but the
manual is horrible.
--
Paul Tomblin <[EMAIL PROTECTED]> http://blog.xcski.com/
"I find your lack of clue...disturbing" - SithAdmin Vader.
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