[postgis-users] Table Spatial Extent

[Brian Hamlin]

I am using GDAL, ogrinfo right now to look at some of my defined tables 
...
I see that in a refractions sample data set, there are SRS and PROJ 
strings defined,
which come back under ogrinfo. For my tables, these are empty, because 
there is
nothing in spatial_ref_sys, y?

however, more noticeable is that my MULTIPOLYGON table and the 
refractions
sample tables come back under ogrinfo with valid extent numbers.
But my POINT table comes back only with

Extent: (-124.50000, 0.000000) - (0.000000, 42.159836)

and then no points are found with a ogrinfo bounding box set...

What is it about the PostGIS tables that might  get detected by ogrinfo 
as
valid extents ?? the POINTS table survived an isValid() constraint, so 
its
not wildly out of definition...

best regards
   -Brian