Re: spatial composition operators for PG

Jan-

check out
http://postgis.refractions.net/

M--
----- Original Message -----
From: "Galkowski, Jan" <jgalkows(at)akamai(dot)com>
To: <pgsql-general(at)postgresql(dot)org>
Sent: Tuesday, November 27, 2007 6:02 PM
Subject: [GENERAL] spatial composition operators for PG

Are there any standard spatial composition operators people use for PG's
polygon and path data types? That is, it seems there ought to be
extenders of the signatures,

polygon <- polygon %+% (point, vertex-number)

path <- path %+% (point, node-number)

where the right-hand-sided point is the new point, and the vertex-number
or node-number tell where to put it. This function might be an
update-in-place.

I saw nothing like this in the PG docs, but I figured people probably
made such things up. Any pointers? Anyone willing to share their
favorites online some place?

TIA,

- Jan

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