GRASS (Geographic Resources Analysis Support System) is a free, open source Geographical Information System (GIS) capable of handling raster, topological vector, image processing, and graphic data. GRASS is released under the GNU General Public License (GPL).
Originally developed by the U.S. Army Construction Engineering Research Laboratories (USA-CERL, 1982-1995), a branch of the US Army Corp of Engineers, as a tool for land management and environmental planning by the military, GRASS has evolved into a powerful utility with a wide range of applications in many different areas of scientific research. 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.
GRASS (Geographic Resources Analysis Support System) is a raster/vector GIS, image processing system, and graphics production system. GRASS contains over 350 programs and tools to render maps and images on monitor and paper; manipulate raster, vector, and sites data; process multi spectral image data; and create, manage, and store spatial data. GRASS uses both an intuitive windows interface as well as command line syntax for ease of operations. GRASS can interface with commercial printers, plotters, digitizers, and databases to develop new data as well as manage existing data.
Import/Export: Data formats supported by GRASS
* 2D raster data,
* 3D raster data (voxels),
* topological vector data (2D and 3D)
Data Management capabilities of GRASS:
* Spatial analysis
* Map generation
* Data visualization (2D, 2.5D and 3D)
* Data generation through modelling (list of simulation models)
* Link to DBMS (PostgreSQL, mySQL, SQLite, ODBC, ...)