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# About QGIS
[](https://travis-ci.org/qgis/QGIS)
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[](https://cloud.docker.com/app/qgis/repository/docker/qgis/qgis/general)
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[](https://dev.azure.com/qgis/QGIS/_build/latest?definitionId=1& branchName=master)
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
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QGIS is an Open Source Geographic Information System. The project was born in
May of 2002 and was established as a project on SourceForge in June of the same
year. We've worked hard to make GIS software (which is traditionally expensive
commercial software) a viable prospect for anyone with basic access to a
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Personal Computer. QGIS currently runs on most Unix platforms (macOS/OS X included)
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and Windows. QGIS is developed using the [Qt toolkit ](https://qt.io ) and C++. This
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means that QGIS feels snappy to use and has a pleasing, easy to use graphical
user interface.
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QGIS aims to be an easy to use GIS, providing common functions and
features. The initial goal was to provide a GIS data viewer. QGIS has
reached that point in its evolution and is being used by many for their
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daily GIS data viewing and editing needs. QGIS supports a number of raster
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, vector and mesh data formats, with new support easily added using the plugin
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architecture.
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QGIS is released under the GNU Public License (GPL) Version 2 or above.
Developing QGIS under this license means that you can (if you want to) inspect
and modify the source code and guarantees that you, our happy user will always
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have access to a GIS program that is free of cost and can be freely
modified.
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## Supported raster formats include:
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* GRASS
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* USGS DEM
* ArcInfo binary grid
* ArcInfo ASCII grid
* ERDAS Imagine
* SDTS
* GeoTiff
* Tiff with world file
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* WMS, WCS
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## Supported vector formats include:
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* ESRI Shapefiles
* PostgreSQL/PostGIS
* GRASS
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* GeoPackage
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* SpatiaLite
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* [Other OGR supported formats ](http://www.gdal.org/ogr_formats.html )
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* MSSQL
* Oracle
* WFS
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## Supported mesh formats include:
* NetCDF
* GRIB
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* 2DM
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* [Other MDAL supported formats ](https://github.com/lutraconsulting/MDAL#supported-formats )
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## Note
Please follow the installation instructions carefully.
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After extracting the distribution, please check the
[documentation ](https://qgis.org/en/docs/index.html )
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## Help us
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Please submit bug reports using the [QGIS bug tracker ](https://github.com/qgis/QGIS/issues/ ).
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## Support
You can get support in the following ways:
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- Using the QGIS community site at https://qgis.org
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- Joining the [qgis-users mailing list ](https://lists.osgeo.org/mailman/listinfo/qgis-user )
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- Chatting with us real-time.
Please wait around for a response to your question as many folks
on the channel are doing other things and it may take a while for
them to notice your question.
The following paths all take you to the same chat room:
- Using an IRC client and joining the [#qgis ](http://webchat.freenode.net/?channels=#qgis ) channel on irc.freenode.net.
- Using a Matrix client and joining the [#qgis:matrix.org ](http://matrix.to/#/#qgis:matrix.org ) room.
- Using [Gitter ](https://gitter.im/qgis/QGIS?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge ) chat.
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## Contribute
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QGIS is on GitHub at https://github.com/qgis/QGIS. If you wish to contribute
patches you can [fork the project ](https://help.github.com/forking/ ), make your changes, commit to your
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repository, and then [create a pull request ](https://help.github.com/articles/creating-a-pull-request-from-a-fork/ ). The development team can then review your contribution and commit it upstream as appropriate.
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If you commit a new feature, add [FEATURE] to your commit message AND give a clear description of the new feature. A webhook will automatically create an issue on the QGIS-Documentation repo to tell people to write documentation about it.
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If you are not a developer, there are many other possibilities which do not require programming skills to help QGIS to evolve. Check our [project homepage for more information ](http://qgis.org/en/site/getinvolved/index.html ).
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### Building from source
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The [building guide ](INSTALL.md ) can be used to get started with building QGIS from source.