QGIS is a free and open source GIS program developed by a team volunteers with the support of non-profit organizations. It utilizes a graphical user interface. It is compatible with a variety of operating systems and is available in 32-bit and 64-bit versions. Users of ESRI software will find that many of the features and tools of ArcMap are also available in QGIS. The interface of QGIS is similar to ArcMap. For users of ESRI products, QGIS is a good way to explore open source GIS software.
Viewing a shapefile's attribute table.
A DEM in QGIS. 10m contour intervals were created using the Extraction Tool.
Raster Calculator. A query of the DEM for pixels with an elevation of 950m or greater was performed.
A selection of tools available in QGIS follows:
QGIS does not support ESRI personal or file geodatabases. In order to open a feature class, it will have to first be converted to a shapefile. Rasters from geodatabases will also have to be converted. QGIS does support PostGIS and SpatialLite databases, both of which are based on SQL. PostGIS and Spatial are free open source spatial database management programs.
QGIS: A free and open source Geographic Information System - http://www.qgis.org/en/site/index.html
Quantum GIS Planet - http://planet.qgis.org/planet/
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