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 worldwide GRASS Development Team headquartered at ITC-Irst (SSI/MPA), Trento, Italy and Baylor University, Texas are the official sites for all new research, development, testing, distribution, training, and support.
One line command reference - overview
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.