PostgreSQL is a powerful, open source object-relational database system.

PostGIS is a spatial database extender for PostgreSQL. It adds support for geographic object allowing location queries to be run in SQL. 

PostGIS adds extra types (geometry, geography, raster and others) to the PostgreSQL database. It also adds functions, operators, and index enhancements that apply to these spatial types. These additional functions, operators, index bindings and types augment the power of the core PostgreSQL DBMS, making it a fast, feature filled robust spatial database management system.

PostGIS enjoys wide support from various third party open source and proprietary tools. Some of the more common Open Source tools and software used in conjunction with PostGIS are:

  • GDAL/OGR Utilities
  • QGIS
  • MapServer
  • GeoServer

More information about PostGIS can be found at the website, and for PostgreSQL at

or contact DMSNZ to talk to us about using the application in your organisation.


PostGIS has no associated licensing costs as it is licensed under the GNU General Public License. PostGIS is part of the Open Source Geospatial Foundation (OSGeo).