RiverGIS is a component of the GHAAS software package. RiverGIS serves as a data pre-processing and analysis tool for geographic data.RiverGIS, as its name implies, is geographical information system (GIS) software. RiverGIS is not intended to replace or compete with existing GIS software. It was designed to complement existing GIS packages (like ARC/INFO) and provide special functionality for river hydrological studies. A key feature of RiverGIS is the capability to handle grided networks in a topological manner. These river networks are derived from digital elevation models (DEMs).

RiverGIS was developed for UNIX systems (primarily for Linux and tested on SGI-IRIX and Digital-OSF/Unix, but is likely to work on other flavors of UNIX). RiverGIS is configured to store all loaded data in memory, thus processing speed will be influenced by file size.

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