QGIS

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QGIS
QGis Logo.png
QGIS 2.0.1 Dufour - Screenshot showing relief.png
QGIS 2.0.1 Dufour showing a relief map.
Developer(s)QGIS Development Team
Initial releaseJanuary 2009 (2009-01)
Stable release2.0.1 (Dufour) / September 10, 2013; 2 months ago (2013-09-10)
Written inC++, Python, Qt
PlatformCross-platform
Available inMultilingual
TypeGeographic information system
LicenseGNU GPL
Websitehttp://qgis.org/
 
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QGIS
QGis Logo.png
QGIS 2.0.1 Dufour - Screenshot showing relief.png
QGIS 2.0.1 Dufour showing a relief map.
Developer(s)QGIS Development Team
Initial releaseJanuary 2009 (2009-01)
Stable release2.0.1 (Dufour) / September 10, 2013; 2 months ago (2013-09-10)
Written inC++, Python, Qt
PlatformCross-platform
Available inMultilingual
TypeGeographic information system
LicenseGNU GPL
Websitehttp://qgis.org/

QGIS (previously known as "Quantum GIS") is a cross-platform free and open source desktop geographic information systems (GIS) application that provides data viewing, editing, and analysis capabilities.[1]

Functionality[edit]

Similar to other software GIS systems QGIS allows to create maps with many layers using different map projections. Maps can be assembled in different formats and for different uses.[1] QGIS allows maps to be composed of raster or Vector layers. Typical for this kind of software the vector data is stored as either point, line, or polygon-feature. Different kinds of raster images are supported and the software can perform georeferencing of images.

Advanced Functions[edit]

QGIS provides integration with other open source GIS packages, including PostGIS, GRASS, and MapServer to give users extensive functionality.[2] Plugins, written in Python, extend the capabilities of QGIS. There are plugins to geocode using the Google Geocoding API, perform geoprocessing (fTools) similar to the standard tools found in ArcGIS, interface with PostgreSQL and MySQL databases, and use Mapnik as a map renderer.

Development[edit]

Gary Sherman began development of Quantum GIS in early 2002, and it became an incubator project of the Open Source Geospatial Foundation in 2007.[3] Version 1.0 was released in January 2009.[4]

Written in C++, QGIS makes extensive use of the Qt library.[2] QGIS allows integration of plugins developed using either C++ or Python. In addition to Qt, required dependencies of QGIS include GEOS and SQLite. GDAL, GRASS GIS, PostGIS, and PostgreSQL are also recommended, as they provide access to additional data formats.[5]

QGIS runs on multiple operating systems including Mac OS X, Linux, UNIX, and Microsoft Windows. For Mac users, the advantage of QGIS over GRASS GIS is that it does not require the X11 windowing system in order to run, and the interface is much cleaner and faster. QGIS can also be used as a graphical user interface to GRASS. QGIS has a small file size compared to commercial GIS's 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.[citation needed]

QGIS is maintained by an active group of volunteer developers who regularly release updates and bug fixes. As of 2012 developers have translated QGIS into 48 languages and the application is used internationally in academic and professional environments.

Release history[edit]

VersionCodenameRelease dateSignificant changes
0.0.1-alphaJuly 2002Import and view data from PostGIS[6]
0.0.3-alphaAugust 10, 2002Added support for shapefiles and other vector formats.[6]
0.0.4-alphaAugust 15, 2002Improvements in layers handling, colorize layers, and view properties in a dialog box.[6]
0.0.5-alphaOctober 5, 2002Bug fixes and improved stability, ability to set line widths, and improved zoom in/out functionality.[6]
0.0.6November 24, 2002Improvements to PostGIS connections, layer identify function added, and ability to view and sort attribute tables.[6]
0.0.7November 30, 2002[1]
0.0.8December 11, 2002[2]
0.0.9January 25, 2003[3]
0.0.10May 13, 2003[4]
0.0.11June 10, 2003[5]
0.0.12June 10, 2003[6]
0.0.13December 8, 2003[7]
0.1pre1February 14, 2004Added support for raster data; single, continuous, and graduated shading for vector data; ability to create buffers, implemented as a PostGIS plugin.[7][8]
0.1MorozFebruary 25, 2004[8]
0.2PumpkinApril 26, 2004[9] [10] [11]
0.3MadisonMay 28, 2004[12] [13]
0.4BabyJuly 4, 2004[14] [15]
0.5BanditOctober 5, 2004[16] [17]
0.6SimonDecember 19, 2004[18] [19]
0.7Seamus[20]
0.7.3October 11, 2005[21] [22]
0.8January 7, 2007[23] [24]
0.8.1"Titan"June 15, 2007[25] [26]
0.9.0October 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"May 12, 2009[39] [40]
1.2.0"Daphnis"September 1, 2009[41] [42]
1.3.0"Mimas"September 20, 2009[43] [44]
1.4.0"Enceladus"January 10, 2010[45] [46]
1.5.0"Tethys"July 29, 2010[47]
1.6.0"Copiapó"November 27, 2010[48] [49]
1.7.0"Wrocław"June 19, 2011[50]
1.8.0"Lisboa"June 21, 2012[51] "Mojibake" in Japanese environment. Fix needs some skills.
2.0.0-2.0.1"Dufour"September 8, 2013New vector API, integration of SEXTANTE geoprocessor, symbology and labelling overhaul [52]

Licensing[edit]

As a free software application under the GNU GPL, QGIS can be freely modified to perform different or more specialized tasks. Two examples are the QGIS Browser and QGIS Server applications, which use the same code for data access and rendering, but present different front-end interfaces. There are also numerous plug-ins available which expand the software's core functionality.

Data formats[edit]

QGIS allows use of shapefiles, coverages, and personal geodatabases. MapInfo, PostGIS, and a number of other formats are supported in QGIS.[9] Web services, including Web Map Service and Web Feature Service, are also supported to allow use of data from external sources.[2]

Adaption[edit]

A number of public and private organizations have adapted QGIS. Among others, these are the Austrian state Vorarlberg, and the Swiss Canton of Solothurn.[10]

References[edit]

  1. ^ a b "Official Website". http://www.qgis.org/. Retrieved 16 October 2013. 
  2. ^ a b c Cavallini, Paolo (August 2007). "Free GIS desktop and analyses: QuantumGIS, the easy way". The Global Geospatial Magazine. 
  3. ^ OSGeo (February 2008). "OSGeo Annual Report 2007". 
  4. ^ Tim Sutton (January 23, 2009). "Announcing the release of QGIS 1.0 'Kore'". Retrieved 2009-01-26. 
  5. ^ "Project details for Quantum GIS - Quantum GIS 0.9.0". Freshmeat. Retrieved 2008-12-31. 
  6. ^ a b c d e "QGIS Change Log". Open Source Geospatial Foundation. 2004-03-09. Retrieved 2008-12-13. 
  7. ^ "README for QGIS version 0.1pre1 'Moroz'". Open Source Geospatial Foundation. Retrieved 2008-12-31. 
  8. ^ "Quantum GIS 0.1pre1 (Development)". Freshmeat News. Freshmeat. 2004-02-14. Retrieved 2008-12-31. 
  9. ^ Gray, James (2008-03-26). "Getting Started With Quantum GIS". Linux Journal. 
  10. ^ "QuantumGIS (QGIS) – freie GIS-Software". Land Vorarlberg. Retrieved 12 October 2013. 

External links[edit]