Subject: [ggl] point on the border and within ?
From: Mateusz Loskot (mateusz)
Date: 2011-10-05 13:42:55
On 05/10/11 15:33, Adam Wulkiewicz wrote:
> 2011/10/5 Aleksandar Babic<aleksandarb_at_[hidden]>
>> Hei, I have the following problem - detecting point on the border
>> of ring, The code is like this: [...] I'm always getting NO. Am I
>> doing something wrong .. or this is a bug?
> within() returns false for borders.
There are many subtle differences between those predicates.
Here is a good summary of them:
and PostGIS documentation is a good source of graphical examples:
Also, I think it's better to speak of boundaries, not borders.
-- Mateusz Loskot, http://mateusz.loskot.net Charter Member of OSGeo, http://osgeo.org Member of ACCU, http://accu.org
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