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Install PostGIS Database

Install Postgresql and PostGIS

Is everything up to date on your system?

sudo aptitude update
sudo aptitude safe-upgrade

Install Postgresql and the PostGIS extensions to enable geographical queries.

sudo aptitude install postgresql-8.4-postgis postgresql-contrib-8.4
sudo aptitude install postgresql-server-dev-8.4
sudo aptitude install build-essential libxml2-dev
sudo aptitude install libgeos-dev libpq-dev libbz2-dev proj

Configure the Postgresql Server

Edit the configuration file at /etc/postgresql/8.4/main/postgresql.conf to set some resonable defaults. These changes help when dealing with large quantities of data that are found in geographic some databases.

These edits are found in four places in the configuration file.

shared_buffers = 128MB # 16384 for 8.1 and earlier
checkpoint_segments = 20
maintenance_work_mem = 256MB # 256000 for 8.1 and earlier
autovacuum = off

Configure runtime kernel parameters

Edit /etc/sysctl.conf to set kernel parameters after a restart.

kernel.shmmax=268435456

Then apply the same kernel parameter now, without restarting.

sudo sysctl kernel.shmmax=268435456

Restart the Postgresql Server

Restart the postgresql database server to enable the configuration changes.

sudo /etc/init.d/postgresql-8.4 restart

The database server should restart without errors or warnings

* Restarting PostgreSQL 8.4 database server
...done.

Create the Postgresql Database

Create a database called "gis". Some of our future tools presume that you will use this database name. Substitute your username for "username" in two places below. This should be the username that will render maps with mapnik.

sudo -u postgres -i
createuser username # answer yes for superuser
createdb -E UTF8 -O username gis
createlang plpgsql gis
exit

Apply the PostGIS Extensions to the Database

Apply the PostGIS extensions to the postgresql database.

psql -f /usr/share/postgresql/8.4/contrib/postgis.sql -d gis

This should respond with many lines ending with

...
CREATE FUNCTION
COMMIT

Substitute your username for "username" in two places in the next line. This should be the username that will render maps with mapnik.

echo "ALTER TABLE geometry_columns OWNER TO username; ALTER TABLE
spatial_ref_sys OWNER TO username;" | psql -d gis

Should reply with

ALTER TABLE
ALTER TABLE

Enable OpenStreetMap Updates

This optional step is only required if you plan to use the OpenStreetMap regular data updates. Enable intarray to enable updates through the OpenStreetMap .osc files for daily, hourly and minutely updates.

psql -f /usr/share/postgresql/8.4/contrib/_int.sql -d gis

Replies with many lines ending with

...
CREATE FUNCTION
CREATE OPERATOR CLASS

Set SRID for PostGIS Database

Set the Spatial Reference Identifier (SRID) on the new database.

psql -f ~/bin/osm2pgsql/900913.sql -d gis

Should reply with

INSERT 0 1