GRASS Geographic Resources Analysis Support System Gabor Heves 8 June, Belgrade

What is GRASS? A general purpose, raster/vector Geographic Information System… …combined with integrated image processing and data visualization subsystems. More specifically: geospatial data management and analysis, image processing, graphics/maps production, spatial modeling, and visualization

About GRASS Originally developed by the U.S. Army Construction Engineering Research Laboratories between Primarily for scientific research: academic, commercial, government (e.g. NASA, US National Park Service, U.S. Census Bureau, USGS etc.) Raster & vector processing, data in SQL database, version 6.0, runs on Unix, Windows, MAC

Development of GRASS Community-based development: by US agencies (core components, module integration), universities, and private companies by any user Since 1997 worldwide network of developers Several million $ worth of development effort

Graphical user interfaces GRASS GIS manager Quantum GIS (Linux/Unix only) Raster, vector, database formats JAVA GRASS Server: spatial processing engine Client: Graphical User Interface Typically used in remote access/production environment

Disadvantages Installation difficult Limited user friendliness Need substantial computer/GIS experience to use Advantages Extensive functionality, a leading GIS package Large and influential user/development community Freely available, open source

Vector operations

Raster operations

3D visualization

Examples for use Geography Landscape ecology Urban planning Biology Geophysics Hydrology Groundwater Flow Modeling Vector network analysis Geostatistics Raster 3D Volume

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