GRASS GIS Birthday

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29 July 1983

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

37th Birthday

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

link link link

33th Birthday

OSGeo logo (text and compas, 2017), project badge, timeline showing 1983, 2006, 2017
Slide from a talk celebrating 33 years of development and innovation

30th Birthday