Quantum GIS

Quantum GIS (QGIS) is a user friendly Open Source Geographic Information System (GIS) that runs on Linux, Unix, Mac OSX, and Windows. QGIS supports vector, raster, and database formats. QGIS is licensed under the GNU General Public License. QGIS lets you browse and create map data on your computer. It supports many common spatial data formats (e.g. ESRI ShapeFile, geotiff). QGIS supports plugins to do things like display tracks from your GPS. QGIS is Open Source software and its free of cost (download here). We welcome contributions from our user community in the form of code contributions, bug fixes, bug reports, contributed documentation, advocacy and supporting other users on our mailing lists and forums. Financial contributions are also welcome.

Newsflash

Quantum GIS Version 0.11.0 has been released. It is available in source form, and as binary executables for Microsoft Windows, Mac OS X, and GNU/Linux. All versions can be obtained from our download page. If the version for your platform is not available please check back in a day or two as some packages are still being built.

Quality Assurance

Originally submitted by jpalmer on Wed, 10/20/2004 - 02:48.

I'm involved in the data validation and overall quality assurance of New Zealand core cadastral spatial information which contains over 50 million spatial objects. A PostGIS data warehouse has been set up for dataset analysis and statistical reporting and has proven to be a very effective and efficient data source.

I mainly use qgis for the visualisation and pattern detection of this PostGIS spatial information. However I also find qgis very useful with its ability to integrate and overlay other raster, MapInfo and shape file formats.