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

2. 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

3. About GRASS Originally developed by the U.S. Army Construction Engineering Research Laboratories between 1982-1995 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

4. 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

5. 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

6. 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

7. Vector operations

8. Raster operations

9. 3D visualization

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

11. Thank you for the attention