PostGIS

Spatial and Geographic objects for PostgreSQL

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About PostGIS

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

SELECT superhero.name
FROM city, superhero
WHERE ST_Contains(city.geom, superhero.geom)
AND city.name = 'Gotham';

In addition to basic location awareness, PostGIS offers many features rarely found in other competing spatial databases such as Oracle Locator/Spatial and SQL Server. Refer to PostGIS Feature List for more details.

License

PostGIS is released under the GNU General Public License (GPLv2 or later). Refer to License FAQ for more information. PostGIS is developed by a group of contributors led by a Project Steering Committee.

News

What's happening right now

Blogs, Tweets and more…

Follow @postgis

PostGIS 2.1.9 Released

The PostGIS development team has uploaded the final release of the PostGIS 2.1 branch. The 2.1 branch is now end-of-life. As befits a patch release, the focus is on bugs and breakages.

• Download
• html doc download
• pdf doc download
• Changelog

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PostGIS 2.4.0rc1 Released

The PostGIS development team is pleased to announce the release of PostGIS 2.4.0rc1. Best served with PostgreSQL 10beta4 or rc1 which is coming soon and pgRouting 2.5.0rc 2.5.0 release is eminent. See the full list of changes in the news file.

We encourage everyone to test and in particular package maintainers to insure no surprises at final release time.

IMPORTANT NOTES

If you are upgrading from an existing PostGIS install, make sure after installing PostGIS 2.4.0rc1 binaries to do.

ALTER EXTENSION postgis UPDATE;

— if you have additional postgishy extensions below upgrade them too

ALTER EXTENSION postgis_sfcgal UPDATE;
ALTER EXTENSION postgis_topology UPDATE;
ALTER EXTENSION postgis_tiger_geocoder UPDATE;
--pgRouting 2.5.0 is imminent
ALTER EXTENSION pgrouting UPDATE;

In order to have Map Box Vector Tiles support enabled, you’ll need to compile with protobuf support and pkg-config to verify the correct minimum version of protobuf-c see protobuf for details. ST_FrechetDistance function will not be enabled if PostGIS is compiled with lower than GEOS 3.7.0. GEOS 3.7.0 will probably not be released before PostGIS 2.4.0 is out.

• Source Download
• html doc download (this version includes Japanese translation postgis-ja.html)
• pdf doc download
• epub doc download
• ChangeLog

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PostGIS 2.4.0beta1 Released

The PostGIS development team is pleased to announce the release of PostGIS 2.4.0beta1. PostGIS 2.4.0 will be the first version to support PostgreSQL 10. Best served with PostgreSQL 10beta4 and pgRouting 2.5.0beta See the full list of changes in the news file.

We encourage everyone to test and in particular package maintainers to insure no surprises at final release time.

IMPORTANT NOTES

From this point forward until release of PostGIS 2.4.0, no new functions will be added.
Only bug fixes will be addressed in future 2.4.0 betas and rcs.

In order to have Map Box Vector Tiles support enabled, you’ll need to compile with protobuf support and pkg-config to verify the correct minimum version of protobuf-c see protobuf for details. ST_FrechetDistance function will not be enabled if PostGIS is compiled with lower than GEOS 3.7.0. GEOS 3.7.0 will be released around the same time as PostGIS 2.4.0 and will have a beta release in a week.

• Source Download
• html doc download (this version includes Japanese translation postgis-ja.html)
• pdf doc download
• epub doc download
• ChangeLog

Read More…

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PostGIS 2.4.0alpha Released

The PostGIS development team is pleased to announce the release of PostGIS 2.4.0alpha. This is the first version to support PostgreSQL 10. Best served with PostgreSQL 10beta2. See the full list of changes in the news file.

• Source Download
• html doc download (this version includes Japanese translation postgis-ja.html)
• pdf doc download
• epub doc download
• ChangeLog

Read More…

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More News…

Upcoming Events

Recent past events

Tips

Causes for 'postgis.backend' is already set

The error ‘postgis.backend’ is already set comes up every so often in PostGIS mailing list. The issue arises often during or after an upgrade. I’ll go over causes for this I am aware of and how to fix.

The question goes something like this

After upgrading to Postgis 2.3 from 2.1, my server log is filled with these messages :

“WARNING ‘postgis.backend’ is already set and cannot be changed until you reconnect”

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Case Studies

Nautilytics Case Study

Nautilytics is a small data visualization and GIS startup based out of Boston, MA. We use PostGIS and PostgreSQL, among other open-source tools to build powerful web applications for US government organizations, public, and private sector companies.

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PostGIS for fast prototyping and Research

I used extensively postgis (+ecosystem) for my phd thesis, in several ways. The first is that PostGIS is a good steady horse (elephant?): a database is the perfect place to store a lot of very different information in the same place and put them in relation. For geospatial data, postgis means you always have a way to put data in relation (are they at the same place?).

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More Case Studies…