GRASS GIS (Geographic Resources Analysis Support System)

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This site is updated daily: 13 Oct 2012
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wxGUI 3D view mode in GRASS 6.4

Geographic Resources Analysis Support System

Commonly referred to as GRASS, this is free Geographic Information System (GIS) software used for geospatial data management and analysis, image processing, graphics/maps production, spatial modeling, and visualization. GRASS is currently used in academic and commercial settings around the world, as well as by many governmental agencies and environmental consulting companies. GRASS is an official project of the Open Source Geospatial Foundation.

Module of the day:
r.average Finds the average of values in a cover map within areas assigned the same category value in a user-specified base map.

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