QGIS: Free and Open-Source GIS Software

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Quantum GIS (QGIS) provides much of the same functionality as Esri’s ArcGIS software (basic level) and has developed into a robust open-source alternative. The term open-source refers to the fact that the source code for the geographic information system (GIS) program is available to anyone, so people can try to improve and add to the software. The QGIS coding community has worked diligently to improve the program and add features in recent years.

How to Learn More about QGIS

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