[postgis-users] Nearest neighbor in 3D

[Bartosz Bekier]

2012/5/26 Paul Ramsey <pramsey at opengeo.org>

> Using ST_3DDistance will work and give you the right answer, but it
> will not be index assisted. The KNN operator <-> is only implemented
> against the 2D index currently.
>

Ok, I see, thanks for confirming that. I'll try to use ST_3Ddwithin() to
limit the number of results, it seems to use the index.

Regards,
-- 
Bartosz
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