GRASS GIS Birthday

29 July 1983

Jim Westervelt working on a GRASS map in the early 1980's at CERL

Markus and Jeff meeting in 2004, where they would agree to create an annual "FOSS4G" global event, to rotate around the world

GRASS v4 manual signed by Jim Westervelt @ FOSS4G 2004

The first user manual for (what would become) GRASS GIS titled “GIS Version 1 Reference Manual” was published by J. Westervelt and M. O’Shea, on 29 July 1983. Jim Westervelt began work on what would become GRASS GIS earlier through his master's thesis, but the publishing date of the first user manual is the celebrated birth date of GRASS.

Source: US Army

40th Birthday

• GRASS Community Meeting Prague 2023 celebrating 40th birthday

37th Birthday

• launched new website
• Celebrated through a Zoom online gathering, on 2020-07-29.

33th Birthday

Slide from a talk celebrating 33 years of development and innovation

• Vaclav Petras. 33 years of GRASS GIS as an innovation platform. 30th NCGIS, Feb 22-24, 2017, Raleigh NC. URL https://ncsu-geoforall-lab.github.io/grass-as-a-platform/ncgis2017.html

30th Birthday

• announcement on 2013-07-29