GRASS (‘‘Geographic Resources Analysis Support System’’) is a powerful, open-source desktop GIS application that supports “geospatial data management and analysis, image processing, graphics/maps production, spatial modeling, and visualization”[]. Although the GRASS software includes a graphical interface, QGIS can serve as a more user-friendly interface via its GRASS plugin.

Installation guides

As of ‘’’'’27-Nov-2007’’’’’, the latest release is ‘’’'’GRASS 6.2.3’’’’’.

GRASS resources on the web

Resource portals