Quantum GIS

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Quantum GIS
Developer(s) QGIS Development Team
Initial release July 2002 (2002-07)
Stable release 2.2 (Valmiera) / 2014-02-26; 7 months ago
Preview release 2.4 / nightly builds
Written in C++,Python,Qt
Operating system Linux, Unix, Mac OSX, Windows and Android
Platform Cross-platform
Type Geographic information system
License GPL
Website http://qgis.org/

Quantum GIS (often abbreviated to QGIS) is a free software desktop Geographic information systems (GIS) application that provides data viewing, editing, and analysis capabilities.

Contents

[edit] Development

Gary Sherman began development of Quantum GIS in early 2002, and it became an incubator project of the Open Source Geospatial Foundation in 2004.[1] Version 1.0 was released in January 2009.[2]

Quantum GIS is written in C++, and its GUI uses the Qt library.[1] Quantum GIS allows integration of plug-ins developed using either C++ or Python. In addition to Qt, required dependencies of Quantum GIS include GEOS and SQLite. GDAL, GRASS GIS, PostGIS, and PostgreSQL are also recommended.[3]

Quantum GIS is a multi-platform application and runs on different operating systems including Mac OS X, Linux, UNIX, and Microsoft Windows. For Mac users, the advantage of Quantum GIS over GRASS GIS is that it does not require the X11 windowing system in order to run, and all around the interface is much cleaner and faster. Quantum GIS can also be used as a graphical user interface to GRASS. Quantum GIS has a small file size compared to commercial GISs and requires less RAM and processing power; hence it can be used on older hardware or running simultaneously with other applications where CPU power may be limited.

Quantum GIS is continually maintained by an active group of volunteer developers who regularly release updates and bug fixes. Currently, developers have converted Quantum GIS into 14 languages and the application is used internationally in academic and professional environments.

[edit] Release history

Version Codename Release date Significant changes
0.0.1-alpha July 2002 Import and view data from PostGIS[4]
0.0.3-alpha August 10, 2002 Added support for shapefiles and other vector formats.[4]
0.0.4-alpha August 15, 2002 Improvements in layers handling, colorize layers, and view properties in a dialog box.[4]
0.0.5-alpha October 5, 2002 Bug fixes and improved stability, ability to set line widths, and improved zoom in/out functionality.[4]
0.0.6 November 24, 2002 Improvements to PostGIS connections, layer identify function added, and ability to view and sort attribute tables.[4]
0.0.7 November 30, 2002 [1]
0.0.8 December 11, 2002 [2]
0.0.9 January 25, 2003 [3]
0.0.10 May 13, 2003 [4]
0.0.11 June 10, 2003 [5]
0.0.12 June 10, 2003 [6]
0.0.13 December 8, 2003 [7]
0.1pre1 February 14, 2004 Added support for raster data; single, continuous, and graduated shading for vector data; ability to create buffers, implemented as a PostGIS plug-in.[5][6]
0.1 Moroz February 25, 2004 [8]
0.2 Pumpkin April 26, 2004 [9] [10] [11]
0.3 Madison May 28, 2004 [12] [13]
0.4 Baby July 4, 2004 [14] [15]
0.5 Bandit October 5, 2004 [16] [17]
0.6 Simon December 19, 2004 [18] [19]
0.7 Seamus [20]
0.7.3 October 11, 2005 [21] [22]
0.8 January 7, 2007 [23] [24]
0.8.1 "Titan" June 15, 2007 [25] [26]
0.9.0 October 26, 2007 [27] [28] [29]
0.9.1 "Ganymede" January 6, 2008 [30] [31] [32]
0.10 "Io" May 3, 2008 [33] [34]
0.11.0 "Metis" July 21, 2008 [35] [36]
1.0.0 "Kore" January 5, 2009 [37] [38]
1.1.0 "Pan" February 29, 2009 [39] [40]
1.2.0 "Daphnis" September 2, 2009 [41] [42]
1.3.0 "Mimas" September 12, 2009 [43] [44]
1.4.0 "Enceladus" January 10, 2010 [45] [46]
1.5.0 "Tethys" July 7, 2010 [47] [48]
1.7.4 Wroclaw February 19, 2012 [49]
1.8 Lisboa June 17, 2012 [50]
2.0 Dafour October 20, 2013 [51]
2.2 Valmiera February 26, 2014 [52]

[edit] Licensing

Because it is distributed as a free software application under the GNU distribution license, Quantum GIS can be reprogrammed to perform different or more specialized tasks. There are also plug-ins available to expand compatibility and functionality.

[edit] Data formats

Quantum GIS allows use of Esri's proprietary shapefile format and coverages. Many other formats are supported via OGR, including ESRI Personal Geodatabases and File Geodatabases (requires GDAL/OGR 1.9). However, mailing list remarks indicate that on Linux, the MSAccess-based Personal Geodatabase format may not work. MapInfo, PostGIS, and a number of other formats are supported in Quantum GIS.[7] Web services, including Web Map Service and Web Feature Service, are also supported to allow use of data from external sources.[1]

[edit] Functionality

Quantum GIS provides integration with other open source GIS packages, including PostGIS, GRASS, and MapServer to give users extensive functionality.[1]

[edit] References

[edit] External links

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