Author: GRASS Development Team

## GRASS GIS 6.2.3 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).

### Quick Introduction

- GRASS startup manual page
- How to start with GRASS
- Introductions
  - 2D raster map processing
  - 3D raster map (voxel) processing
  - Image processing
  - Database management
  - Vector map processing and network analysis
  - Projections and spatial transformations
  - SQL support
  - Display drivers
  - GRASS variables and environment variables
- The GRASS Extensions Manager (GEM)

general commands:

g.access | g.access
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.filename | Prints GRASS data base file names.
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.list | Lists available GRASS data base files of the user-specified data type to standard output.
g.manual | Display the HTML man pages of GRASS
g.mapset | Change current mapset
g.mapsets | Modifies the user's current mapset search path, affecting the user's access to data existing under the other GRASS mapsets in the current location.
g.mlist | Apply regular expressions and wildcards to g.list
g.mremove | Apply regular expressions and wildcards to g.remove
g.parser | g.parser
g.pnmcomp | Overlays multiple PPM image files.
g.proj | Prints and manipulates GRASS projection information files.
g.region | Program to manage 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 |
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

Help Index | Full Index
© 2003-2007 GRASS Development Team