Gabriella Turek wrote:
> Hey, I am just getting some results now! So it does work, but if the units 
> make no difference, what units is the distance supposed to be in?
> Gaby
>
> PS My feature sets is so huge though, for both A and B (both point types), so 
> now that the filters work, it was still
> a while before it found some points bnear to some other. Any other way to 
> approach this issue? I would think when you're dealing with hude data sets 
> like this it may be better to deal with them in a DB and use the DB to do the 
> joins first?
>   
You are correct this kind of thing is what PostGIS was made for :-)

If one of your data sets is small enough you may be able to use it as 
the "inner" collection and get a speed up; also you should be able to 
use a JTS spatial index of some sort to get a large speed improvement; 
even larger if we can talk Martin into releasing the next version (which 
has a "PrepairedGeometry" construct so we can store the graph used by 
the outer geometry between and use it to test multiple inner 
geometries). If you can use a bounding box filter (making a square 
bounding box around your point) will be a *lot* faster than the use of 
beyond.

Cheers,
Jody

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