[postgis-users] Where does Postgres end and PostGIS begin?

[Patrick Gostovic]

Hi.

I've installed the postgresql 9.0 macports package and it seems like I have some spatial features already without explicitly installing PostGIS; I created a table with column of type POINT.  I've noticed that macports does have a postgis package.  Do I actually need it?  I guess I'm just really fuzzy as to exactly what PostGIS is relative to Postgres.

Any info would be appreciated.  Thanks!

Patrick