================== Installing PostGIS ================== `PostGIS`_ adds geographic object support to PostgreSQL, turning it into a spatial database. :ref:`geosbuild`, :ref:`proj4` and :ref:`gdalbuild` should be installed prior to building PostGIS. You might also need additional libraries, see `PostGIS requirements`_. The `psycopg2`_ module is required for use as the database adapter when using GeoDjango with PostGIS. On Debian/Ubuntu, you are advised to install the following packages: postgresql-x.x, postgresql-x.x-postgis, postgresql-server-dev-x.x, python-psycopg2 (x.x matching the PostgreSQL version you want to install). Alternately, you can `build from source`_. Consult the platform-specific instructions if you are on :ref:`macosx` or :ref:`windows`. .. _PostGIS: http://postgis.net/ .. _psycopg2: http://initd.org/psycopg/ .. _PostGIS requirements: http://postgis.net/docs/postgis_installation.html#install_requirements .. _build from source: http://postgis.net/docs/postgis_installation.html#install_short_version Post-installation ================= .. _spatialdb_template: Creating a spatial database --------------------------- PostGIS 2 includes an extension for PostgreSQL that's used to enable spatial functionality:: $ createdb $ psql > CREATE EXTENSION postgis; The database user must be a superuser in order to run ``CREATE EXTENSION postgis;``. The command is run during the :djadmin:`migrate` process. An alternative is to use a migration operation in your project:: from django.contrib.postgres.operations import CreateExtension from django.db import migrations class Migration(migrations.Migration): operations = [ CreateExtension('postgis'), ... ] GeoDjango does not currently leverage any `PostGIS topology functionality`__. If you plan to use those features at some point, you can also install the ``postgis_topology`` extension by issuing ``CREATE EXTENSION postgis_topology;``. __ http://postgis.net/docs/Topology.html Managing the database --------------------- To administer the database, you can either use the pgAdmin III program (:menuselection:`Start --> PostgreSQL 9.x --> pgAdmin III`) or the SQL Shell (:menuselection:`Start --> PostgreSQL 9.x --> SQL Shell`). For example, to create a ``geodjango`` spatial database and user, the following may be executed from the SQL Shell as the ``postgres`` user:: postgres# CREATE USER geodjango PASSWORD 'my_passwd'; postgres# CREATE DATABASE geodjango OWNER geodjango;