Finally Grass was ported to the Macintosh environment by OpenOSX.
GRASS is one of the most powerful geographical information system that is currently maintained at the Istituto Trentino di Cultura, in Italy. It may be one of the technology to look for to analyze spatial information and to correlate data aggregated in the form of a cartographic representation. There is also an interesting way to look at the data extracted by Grass with the power of the R environment.

GRASS (Geographic Resources Analysis Support System) is a Geographical Information System (GIS) with raster, topological vector, image processing, and graphics production functionality that operates on various platforms through a graphical user interface and/or command line. A state-of-the-art NVIZ 3-D visualization program is also included. Grass is The open source alternative to ArcView bundled with their spatial analysis module. A similar configuration can easily cost more than US $20,000. GRASS is a complete geographical operating system; with more then 350 powerful, geo-spatial modules.

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