Open Source Geospatial Foundation (OSGeo)
signed September 2011 in Nürnberg by Georg Gartner (ICA President) and Arnulf Christl (OSGeo President)
OSGeo website (external link)
Details of Memorandum (external link)
Global Spatial Data Infrastructures (GSDI)
signed July 2011 in Paris by William Cartwright (ICA President) and Abbas Rajabifard (GSDI President)
European Spatial Data Research Network (EuroSDR)
signed July 2011 in Paris by William Cartwright (ICA President) and
Jean-Philippe Lagrange (EuroSDR President)
Geographical Information Systems International Group (GISIG)
signed July 2005 in A Coruna by Milan Konecny (ICA President) and Giorgio Saio (GISIG Coordinator)
Office of Outer Space Affairs, United Nations (OOSA)
signed March 2005 in Vienna by Milan Konecny (ICA President) and Sergio Camacho-Lara (UNOOSA Executive Director)
Pan American Institute for Geography and History (PAIGH)
signed February 2005 in Mexico City by Milan Konecny (ICA President) and Santiago Borrero (PAIGH Secretary-General)
International Hydrographic Organisation
signed January 2004 in Monaco by Milan Konecny (ICA President) and Alexander Maratos (IHB President), new version signed in 2011
International Federation of Surveyors
Féderation Internationale des Géomètres
signed September 2001 in Beijing by Ferjan Ormeling (ICA Secretary General) and Marku Villika (FIG Director)