You should click the link at the bottom of this e-mail and then click on the 
archives link... there was a fairly detailed discussion on this topic in just 
the past week. Also read the postgis docs regarding "Using SQL" to 
load/retrieve data. 

Basically, you can either write C code that links to postgis to use the native 
geometry data type, or use whatever langauge you want to parse/edit/create WKT 
or WKB and use standard sql to make changes to the table. 

Chris

Quoting "Swaminathan, Gayathri" <gayathri@ou.edu>:

> Hi:
> How to add/insert values into the geometry column of an already existing
> postgresql table?
> 
> For ex:I have a parcels table in postgresql to which I will have to
> alter/update the geom information.
> 
> Thanks,
> Gayathri
> 
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