GRASS GIS 6.4.6svn Reference Manual: general

Note: A new GRASS GIS stable version has been released: GRASS GIS 7. Go directly to the new manual page here

GRASS GIS 6.4.6svn Reference Manual

Geographic Resources Analysis Support System, commonly referred to as GRASS, is a Geographic Information System (GIS) used for geospatial data management and analysis, image processing, graphics/maps production, spatial modeling, and visualization. GRASS is currently used in academic and commercial settings around the world, as well as by many governmental agencies and environmental consulting companies.

This reference manual details the use of modules distributed with Geographic Resources Analysis Support System (GRASS), an open source (GNU GPL'ed), image processing and geographic information system (GIS).

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general commands:

g.access	Controls access to the current mapset for other users on the system.
g.ask	Prompts the user for the names of GRASS data base files.
g.copy	Copies available data files in the user's current mapset search path and location to the appropriate element directories under the user's current mapset.
g.dirseps	Internal GRASS utility for converting directory separator characters.
g.extension	Tool to maintain GRASS extensions in local GRASS installation.
g.filename	Prints GRASS data base file names.
g.findetc	Searches for GRASS support files.
g.findfile	Searches for GRASS data base files and sets variables for the shell.
g.gisenv	Outputs and modifies the user's current GRASS variable settings.
g.gui	Launches a GRASS graphical user interface (GUI) session.
g.list	Lists available GRASS data base files of the user-specified data type.
g.manual	Display the HTML man pages of GRASS
g.mapset	Changes current mapset.
g.mapsets	Modifies the user's current mapset search path.
g.message	Prints a message, warning, progress info, or fatal error in the GRASS way.
g.mkfontcap	Generates the font configuration file by scanning various directories for fonts
g.mlist	Lists available GRASS data base files of the user-specified data type optionally using the search pattern.
g.mremove	Removes data base element files from the user's current mapset.
g.parser	Provides automated parser, GUI, and help support for GRASS scipts.
g.pnmcomp	Overlays multiple PPM image files
g.proj	Prints and manipulates GRASS projection information files (in various co-ordinate system descriptions).
g.region	Manages the boundary definitions for the geographic region.
g.remove	Removes data base element files from the user's current mapset.
g.rename	Renames data base element files in the user's current mapset.
g.setproj	Interactively reset the location's projection settings.
g.tempfile	Creates a temporary file and prints the file name.
g.transform	Computes a coordinate transformation based on the control points.
g.version	Displays version and copyright information.