## GRASS GIS 6.4.4 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.

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© 2003-2014 GRASS Development Team, GRASS GIS 6.4.4 Reference Manual