Bryan Field-Elliot <[EMAIL PROTECTED]> writes:
> I'm developing a GIS system on PostgreSQL.  I need to store a table of 
> points (latitude and longitude), and do queries such as "return all 
> points enclosed with the given circle ((X,Y),R)".

You might care to look at

http://postgis.refractions.net/postgis-0.5.1.tar.gz

and see if you're not reinventing the wheel.

                        regards, tom lane

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