[postgis-users] Overlap Queries - speed
pcreso at pcreso.com
Tue Oct 4 12:25:11 PDT 2005
I've just read this thread with interest, and it has made me curious. I may
have missed some posts, but have a question.
The docs I read (section 4.5) discussed how to add a spatial index on geometry
columns. I had thought this generated a bounding box for use with the &&
operator to improve spatial query performance.
The advice given in this thread was to use AddBBox(the_geom), not to create a
Is there any real underlying difference in these two approaches, and if so,
what is it?
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