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Re: BUG #4967: polygon @> point incorrect for points close to shared borders

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Paul Matthews" <plm(at)netspace(dot)net(dot)au>
Cc: pgsql-bugs(at)postgresql(dot)org
Subject: Re: BUG #4967: polygon @> point incorrect for points close to shared borders
Date: 2009-08-06 14:56:34
Message-ID: 3982.1249570594@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-bugs
"Paul Matthews" <plm(at)netspace(dot)net(dot)au> writes:
> A number of points close to the common border claimed they fell into both of
> the polygons.

How close is "close"?  There's some pretty arbitrary fuzzy-comparisons
logic in the geometric datatypes ... see FPeq() and friends.  That might
be doing it to you.

			regards, tom lane

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