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)
NOTE: Some modules listed here are not yet available in GRASS 5.x.
GRASS development has been conducted since 1995 at USACERL, the GRASS Development Team at Baylor University, Texas and University of Hannover, Germany are now the official sites for all new research, development, testing, distribution, training, and support.
One line command reference - overview
Database Commands
Display Commands
General Commands
Grid 3D Commands
Imagery Commands - Overview
Miscellaneous Commands
Models: simulation models
Paint Commands
Photo Commands
PostScript Commands
Raster Commands - [complete GRASS 4.x/5.x raster command list]
Shell Scripts
Sites Commands
Vector Commands
NVIZ2.2 visualization tool tutorial
Commands Missing a Manual Page
Throughout the manual, module input to be explicitly entered by the user is printed in bold text. User-specified input (i.e., variables set by the user) is set in italic type. Boxed text shows information output to the user's terminal screen.