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==Functionality==
QGIS functions as geographic information system (GIS) software, allowing users to analyze and edit spatial information, in addition to composing and exporting graphical maps.<ref name="Official Website" /> QGIS supports [[raster graphics|raster]], [[Vector graphics|vector]], mesh, and
QGIS supports [[shapefile]]s, personal geodatabases, [[dxf]], [[MapInfo Professional|MapInfo]], [[PostGIS]], and other industry-standard formats.<ref>{{cite news |url=http://www.linuxjournal.com/content/getting-started-quantum-gis |title=Getting Started With Quantum GIS |work=Linux Journal |last=Gray |first=James |date=2008-03-26}}</ref> Web services, including [[Web Map Service]] and [[Web Feature Service]], are also supported to allow use of data from external sources.<ref name="Cavallini"/>
QGIS integrates with other open-source GIS packages, including [[PostGIS]], [[GRASS GIS]], [[SAGA GIS]], and [[MapServer]].<ref name="Cavallini"/> [[Plug-in (computing)|Plugins]] written in [[Python (programming)|Python]] or [[C++]] extend QGIS's capabilities. Plugins can geocode using the Google Geocoding API, perform geoprocessing functions similar to those of the standard tools found in [[ArcGIS]], and interface with [[PostgreSQL]]/[[PostGIS]], [[SpatiaLite]] and [[MySQL]] databases.
QGIS is built on top of, and standard installs include, broadly-used open-source GIS format and projection conversion libraries [[GDAL]] and [[PROJ|proj]].
==Development==
Gary Sherman began the development of Quantum GIS in early 2002, and it became an incubator project of the [[Open Source Geospatial Foundation]] in 2007.<ref>{{cite web|url=http://wiki.osgeo.org/wiki/Annual_Report_2007_Compiled |author=OSGeo |title=OSGeo Annual Report 2007|date=February 2008}}</ref> Version 1.0 was released in January 2009.<ref>
{{cite web|url=http://lists.osgeo.org/pipermail/qgis-developer/2009-January/005774.html |author=Tim Sutton |title=Announcing the release of QGIS 1.0 'Kore' |date=January 23, 2009 |access-date=2009-01-26}}</ref>
In 2013, along with release of version 2.0 the name was officially changed from ''Quantum GIS'' to ''QGIS'' to avoid confusion as both names had been used in parallel.<ref name="renamed">{{cite web|title=Changelog for QGIS 2.0 - Quantum GIS is now known only as 'QGIS' |url=https://www.qgis.org/en/site/forusers/visualchangelog200/index.html#feature-quantum-gis-is-now-known-only-as-qgis |publisher=QGIS |access-date=1 January 2020}}</ref>
Written mainly in [[C++]], QGIS makes extensive use of the [[Qt (toolkit)|Qt]] library.<ref name="Cavallini">
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| 2002-07
| First public release. [Java]
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! 1.0
| Kore
| 2009-01-05
|[Java]
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! 2.0
| Dufour
| 2013-09-08
|New vector API, integration of SEXTANTE geoprocessing, symbology and labeling overhaul. Dropped "Quantum" from the name. [Java]
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! 3.0
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|Maidenhead
|2024-02-23
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!'''3.38'''
|Grenoble
|2024-06-21
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