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General information

There are now 3 GRASS branches: 5.0 is the stable branch, from which the various 5.0.x releases are derived. Future releases from this branch should contain only bug-fixes or minor, backward-compatible improvements. 5.0.3 was released 6 November 2003.
5.3 is the development version of 5.0. It will include anything which is added to the 5.0 branch (although such changes will typically go into 5.3 initially, then get merged into the 5.0 branch later), plus some other changes which are too intrusive to go into the 5.0.x releases (e.g. because they break backwards compatibility, or introduce additional dependencies). See related web pages.
5.7 is the experimental version which was previously referred to as "5.1". See related web pages.

For features details, please refer to the Roadmap.

Current stable version: GRASS 5.0.3 (released 6 November 2003), GRASS 5.0.3 is a bugfix release only.

Press Release 5.0.0 September 2002: First Stable Release - GRASS 5 Free Geographic Information System

What's new in current release of GRASS 5.0.x?

Read on the detailed NEWS list. For details please read the detailed changes HISTORY.

What's new in GRASS 5.0.x compared to 4.x?

GRASS 5.0.x represents the first major change in GRASS functionality in several years, with the most notable change being support for floating point and null values. GRASS also now has an improved graphical user interface based on Tcl/Tk. Additionally a new multiple attributes/multiple dimensions sites format is implemented, a new three dimensional raster format grid3 (voxel format, only in experimental tree) and first library functions for the GRASS DateTime Library. Additionally 122 projections are supported! Two new visualization interfaces in the form of Tcl/Tk GRASS and Nviz. NVIZ allows users to realistically render multiple surfaces in 3D space, drape GRASS vector files over surfaces, and display sites files either on surfaces or as 3D points. Tcl/Tk GRASS provides a platform-independant windowing system for GRASS.

Caution - GRASS 5.0 creates different map layer data formats. GRASS 4.X mapsets are upward compatible with GRASS 5.0, but mapsets created with GRASS 5.0 are NOT downward compatible with 4.x !!!! If you should use a database created with GRASS 4.x (please use a copy), run r.support on all raster maps and v.support on all vector maps to update them to GRASS 5 structure.
See also press release on GRASS raster compression changes.

How stable is GRASS 5.0.x?

GRASS 5.0.x has been tested on Linux, MacOSX, SUN, WindowsNT/2000/XP and Silicon Graphics Irix systems. Many people use it for daily production. HOWEVER, there are likely still some bugs to be worked out.

GRASS 5.0 documents

Bug reports

Clustered GRASS GIS

GIS related work is regularly CPU-intensive - as CPU power becomes cheaper nowadays, GRASS might be run in clustered environments. There are several options to parallelize GRASS:


GRASS Credits page (incomplete) - List of GRASS Development Team members


Ok, ok. How can I get current GRASS 5.0.x release?

Go to the download page and start downloading!

Some additional tidbits you may need...

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