# Some good references are:
# http://russbrooks.com/2010/11/25/install-postgresql-9-on-os-x
# http://www.paolocorti.net/2008/01/30/installing-postgis-on-ubuntu/
# http://postgis.refractions.net/documentation/manual-1.5/ch02.html#id2630392

#1. Install PostgreSQL postgis and postgres

sudo apt-get install postgresql-8.4 postgresql-client-8.4 postgresql-contrib-8.4

# Maybe you may need to install from this repository:
# https://launchpad.net/~ubuntugis/+archive/ubuntugis-unstable
sudo apt-get install postgresql-8.4-postgis

#2. Create a template to be used on creating GIS-enabled databases

sudo su postgres

createdb postgis_template
createlang plpgsql postgis_template

#Import Postgis Data
psql -d postgis_template -f /usr/share/postgresql/8.4/contrib/postgis-1.5/postgis.sql
psql -d postgis_template -f /usr/share/postgresql/8.4/contrib/postgis-1.5/spatial_ref_sys.sql

#Test if works
psql -d postgis_template -c "SELECT postgis_full_version();"

#3. Set template permissions to gisgroup
createuser -R -S -L -D -I gisgroup;

psql -d postgis_template
ALTER DATABASE postgis_template OWNER TO gisgroup;
ALTER TABLE geometry_columns OWNER TO gisgroup;
ALTER TABLE spatial_ref_sys OWNER TO gisgroup;
CREATE SCHEMA gis_schema AUTHORIZATION gisgroup;
\q

#4. Adds your app's user
createuser -i -l -S -R -d <app_user>

psql -d postgres
GRANT gisgroup TO <app_user>;
\q

# Note: Remember to adding the <app_user> to your /etc/postgresql/8.4/main/pg_hba.conf
# Example: local all <app_user> trust

#5. Create your app database
createdb -T postgis_template -O <app_user> <app_db>;