QGIS (formerly known as Quantum GIS) is a popular open source GIS software application. QGIS can be downloaded for free.

Growth of GIS job listings with the term open source.

Five Reasons to Start Using QGIS

Caitlin Dempsey

Here are five compelling reasons to start using the open-source GIS platform QGIS, a free and open source software.

Open Source GIS and Freeware GIS Applications

Caitlin Dempsey

There are many open source GIS and web mapping applications to choose from.

Screenshot from a GIS software program showing an aerial image with geospatial data overlays for Missouri.

Finding GIS Data and Using QGIS to Map Caves

GIS Contributor

Dackery Geiman outlines the challenges he encountered finding geospatial data about caves and using QGIS to map cave density in Missouri.

Elevation map with shades of green.

GIS in Land Use Planning and Surveying

GIS Contributor

Michael Parks explains how he used GIS data and imagery to develop geospatial analysis and maps to recommend potential base camp sites.

A detailed map showing a shaded relief area and a popup with attribute data about a fly fishing shop.

Using GIS to Map Fly Fishing Destinations

GIS Contributor

William Bakemeyer describes how he used QGIS and open source data to create a fly fishing map.

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