GRASS

Geographic Resources Analysis Support System

Gabor Heves8 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 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

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 GRASSServer: spatial processing engineClient: 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

Thank you for the attention