[postgis-users] Spatial operators
pramsey at refractions.net
Thu Oct 10 08:33:07 PDT 2002
Luis Mota wrote:
> Hi everyone.
> I have a small question concerning the spatial operators: <<, >> , &>
> and <&.
> In the online documentation, I understood that, with these operators, we
> can compare the relative position of two geometries, in a strict or
> overlaping way.
There is definately nothing strict about those operators. They compare
bounding boxes, period. Strict comparisons will be done with the
Relate() and associated functions, once we have our topological library
> What I would like to ask is what these concepts of 'left' and 'right'
> mean... Is this relative to the X-axis? I ask this because I made some
> tests and that's what I figured out... In this case, are there operators
> that deal with the Y-Axis?
> Bye and thanks, Luís Mota
> postgis-users mailing list
> postgis-users at postgis.refractions.net
| Paul Ramsey
| Refractions Research
| Email: pramsey at refractions.net
| Phone: (250) 885-0632
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