[postgis-users] Gist and points

[Obe, Regina]

I checked my point records and they don't have them either.  I'm
guessing that there is no benefit to having a bbox on a point geometry
since a point is lighter than the bbox.  So I'm guessing when you put a
gist index on point geometries, it doesn't wrap a bbox around it as it
does with polygons.

I found this old postgis newgroup item too on further inspection.  I
assume this still applies.

http://postgis.refractions.net/pipermail/postgis-users/2005-October/0095
50.html

 

-----Original Message-----
From: postgis-users-bounces at postgis.refractions.net
[mailto:postgis-users-bounces at postgis.refractions.net] On Behalf Of
Stephen Crawford
Sent: Thursday, September 20, 2007 9:43 AM
To: 'PostGIS Users Discussion'
Subject: [postgis-users] Gist and points

I have a db with a few million points.  I noticed that hasbbox(the_geom)
=
false for these points.  Does the gist index require that each these
geometries have a bbox?  Should I add a bbox?

Thanks,
Steve


Stephen Crawford
Center for Environmental Informatics
The Pennsylvania State University
 

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