[postgis-users] How to get the centroid of an bounding box using st_extent

[Charlie Savage]

Hi Paul,

>> Thanks for the information.  Ok, then I'll see if I can fix up the 
>> bbox2  to geometry conversion so it returns a point if either 
>> xmin=xmax or ymin=ymax.  Currently it returns an invalid polygon - 
>> same problem that envelope had.
> 
> Hmmm... for an linear envelope would returning a linestring not make 
> more sense?

Hah - no doubt.  Will do that.

Charlie
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