Luigi 
The thing is that your point is not within when it is on the boundary, but by 
definition the point has no boundary wich makes one point on top of another 
being within. From a practical perspective it doesn't really make sense, I 
agree. I was struggling with something similar a few months ago. But it comes 
from definitions of the point, wich in other cases seems more logic. /Nicklas


2009-09-18 Luigi Castro Cardeles wrote:

Hi list and Chris,
>
>yes, the point (10 18) is on boundary (this point is the first vertex)  .
>
>[]'s
>Luigi Castro Cardeles
>
>
>>
2009/9/18 Chris Hermansen <[email protected]>
> 10 and 18 are on the boundary, no?
> Chris Hermansen        [email protected]
> tel+1.604.714.2878 · fax+1.604.733.0631 · mob+1.778.840.4625
> Timberline Natural Resource Group · www.timberline.ca
> 401 · 958 West 8th Avenue  · Vancouver BC · Canada · V5Z 1E5
>
>
> -----Original Message-----
> From: Luigi Castro Cardeles <[email protected]>
>
> Date: Fri, 18 Sep 2009 00:29:11
> To: PostGIS Users Discussion<[email protected]>
> Subject: [postgis-users] Problem with ST_WITHIN
>
>
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