When postGIS installs, it puts a template database into your PG installation: "template_postgis". I don't know whether it always shows up in your database list by default, but if you go to add a new database to PostgreSQL, and if template_postgis isn't there, then PostGIS isn't installed.
Once you download and install PostGIS from teh site Brent mentioned, that's how the functionality is added to a database most easily; by starting a database with that template; all the postGIS functions and a couple of tables will then be present in the public schema of the database. This does not add PostGIS functionality directly to existing databases; that's a different process.
hth, Mark
From:
Brent Dombrowski <brent.dombrowski@gmail.com>
To:
Lille Penguini <lille.penguini@gmail.com>
Cc:
pgsql-novice@postgresql.org
Date:
08/10/2011 10:42 AM
Subject:
Re: [NOVICE] how do I add postgis to an existing postgresql install?
Sent by:
pgsql-novice-owner@postgresql.org
On Aug 9, 2011, at 6:49 PM, Lille Penguini wrote:
> Hi, > > Two things, dear reader: > > 1) how can I be sure postgis was not included in my postgresql install, and > 2) if it wasn't how can I add postgis to my exisiting install? > > Thanks, > > Lille
I would start by reading up on PostGIS at their web site: http://postgis.refractions.net/ They have the PostGIS documentation, install instructions, and mailing lists for PostGIS.
