= How to install PostGIS 2.0 on Ubuntu 10.04 (''lucid'') from source =

== Prerequisites ==
Several components are needed, which can either be built from source or installed from pre-built packages, as shown below.

Install prerequisite packages using:
{{{
sudo apt-get install build-essential postgresql-8.4 postgresql-server-dev-8.4 libxml2-dev proj libjson0-dev
}}}

Optional package for raster support:
{{{
sudo apt-get install libgdal-dev
}}}

Optional packages for testing PostGIS:
{{{
sudo apt-get install libcunit1-dev
}}}
Optional packages for building documentation:
{{{
sudo apt-get install xsltproc docbook-xsl docbook-mathml imagemagick
}}}
(for building PDF documentation, add `dblatex`, but expect a large download)

=== Build GEOS 3.3.2 ===
PostGIS 2.0 requires GEOS >= 3.3.2 for topology support.

There are multiple ways to build GEOS, but this is the simplest:
{{{
wget http://download.osgeo.org/geos/geos-3.3.2.tar.bz2
tar xvfj geos-3.3.2.tar.bz2
cd geos-3.3.2
./configure
make
sudo make install
cd ..
}}}

== Build PostGIS ==
{{{
wget http://postgis.refractions.net/download/postgis-2.0.0beta4.tar.gz
tar xfvz postgis-2.0.0beta4.tar.gz
cd postgis-2.0.0beta4
}}}
PostGIS 2.0 can be configured to disable topology or raster extensions, using the configure flags `--without-raster` and `--without-topology`. The default is to build both extensions:
{{{
./configure
make
sudo make install
sudo ldconfig
sudo make comments-install
}}}

Lastly, enable the command-line tools to work from your shell:
{{{
sudo ln -sf /usr/share/postgresql-common/pg_wrapper /usr/local/bin/shp2pgsql
sudo ln -sf /usr/share/postgresql-common/pg_wrapper /usr/local/bin/pgsql2shp
sudo ln -sf /usr/share/postgresql-common/pg_wrapper /usr/local/bin/raster2pgsql
}}}

== Template ==
Complete a post-install by creating a template, which can be re-used for creating multiple spatially-enabled databases. Or if you just want to make one spatially enabled database, you can modify the commands for your needs.
{{{
sudo -u postgres createdb template_postgis
sudo -u postgres createlang plpgsql template_postgis
sudo -u postgres psql -d template_postgis -f /usr/share/postgresql/8.4/contrib/postgis-2.0/postgis.sql
sudo -u postgres psql -d template_postgis -f /usr/share/postgresql/8.4/contrib/postgis-2.0/spatial_ref_sys.sql
sudo -u postgres psql -d template_postgis -f /usr/share/postgresql/8.4/contrib/postgis-2.0/postgis_comments.sql
}}}

=== Enable raster extension ===
Adding on to `template_postgis`:
{{{
sudo -u postgres psql -d template_postgis -f /usr/share/postgresql/8.4/contrib/postgis-2.0/rtpostgis.sql
sudo -u postgres psql -d template_postgis -f /usr/share/postgresql/8.4/contrib/postgis-2.0/raster_comments.sql
}}}

=== Enable topology extension ===
Adding on to `template_postgis`:
{{{
sudo -u postgres psql -d template_postgis -f /usr/share/postgresql/8.4/contrib/postgis-2.0/topology.sql
sudo -u postgres psql -d template_postgis -f /usr/share/postgresql/8.4/contrib/postgis-2.0/topology_comments.sql
}}}

== See also ==
 * https://help.ubuntu.com/community/PostgreSQL