Difference between revisions of "PostGIS"

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(Creating a Template PostGIS Database)
(Added instructions to fix error when activating latest postgis.)
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*Install PostGIS.
 
*Install PostGIS.
 
  $ su
 
  $ su
  $ pacman -S postgis
+
  # pacman -S postgis
  
 
== Creating a Template PostGIS Database ==
 
== Creating a Template PostGIS Database ==
 
*Become the postgres user.
 
*Become the postgres user.
 
  $ su
 
  $ su
  $ su - postgres
+
  # su - postgres
 
*If you haven't created a superuser for accessing PostgreSQL, you may want do that now. You will be prompted for granting permissions to that user.
 
*If you haven't created a superuser for accessing PostgreSQL, you may want do that now. You will be prompted for granting permissions to that user.
 
  $ createuser [username]
 
  $ createuser [username]
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== More Resources ==
 
== More Resources ==
 
For additional resources concerning PostGIS, check out the [http://postgis.refractions.net/documentation/ PostGIS Documentation].
 
For additional resources concerning PostGIS, check out the [http://postgis.refractions.net/documentation/ PostGIS Documentation].
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 +
== PostGIS failing with json_tokener_error ==
 +
This happends when adding postgis as an extension.  The libjson-c package has changed, and PostGIS hasn't put out a stable release with this yet.  Its in 2.1.0rc1, though.  The bug-report is http://trac.osgeo.org/postgis/ticket/2213
 +
 +
The fix is to download the postgis PKGBUILD and then change the version to '2.1.0rc1'.  Don't forget to change the sha256sum.

Revision as of 20:12, 31 July 2013

PostGIS adds support for geographic objects in the PostgreSQL database. This document describes the process for installing PostGIS and creating a template PostGIS database. It is assumed that PostgreSQL has been installed. If it hasn't, please refer to the PostgreSQL page.

Installing PostGIS

  • Install PostGIS.
$ su
# pacman -S postgis

Creating a Template PostGIS Database

  • Become the postgres user.
$ su
# su - postgres
  • If you haven't created a superuser for accessing PostgreSQL, you may want do that now. You will be prompted for granting permissions to that user.
$ createuser [username]
  • Create a new database called "template_postgis".
$ createdb -O [username] template_postgis -E UTF-8
  • PostGIS requires the pl/pgSQL language to be installed on a database.
$ createlang plpgsql template_postgis
  • Load the PostGIS spatial types for PostgreSQL and spatial reference systems. "postgis.sql" and "spatial_ref_sys.sql" are part of the installation of PostGIS, and may reside somewhere else besides "/usr/sharepostgresql/contrib/postgis-1.5/" depending on the installation. (Below is for default postgis 1.5 installation)
$ psql -d template_postgis -f /usr/share/postgresql/contrib/postgis-2.0/postgis.sql
$ psql -d template_postgis -f /usr/share/postgresql/contrib/postgis-2.0/spatial_ref_sys.sql
  • Make it a real template.
$ psql

UPDATE pg_database SET datistemplate = TRUE WHERE datname = 'template_postgis';

Creating a PostGIS Database From the Template

  • It's common practice to reserve a bare template for creating new PostGIS databases. As a PostgreSQL superuser, the following command will create a new database:
$ createdb -T template_postgis [new_postgis_db]

More Resources

For additional resources concerning PostGIS, check out the PostGIS Documentation.

PostGIS failing with json_tokener_error

This happends when adding postgis as an extension. The libjson-c package has changed, and PostGIS hasn't put out a stable release with this yet. Its in 2.1.0rc1, though. The bug-report is http://trac.osgeo.org/postgis/ticket/2213

The fix is to download the postgis PKGBUILD and then change the version to '2.1.0rc1'. Don't forget to change the sha256sum.