International Society of Photogrammetry and Remote Sensing (ISPRS)

http://www.isprs.org/

Global Spatial Data Infrastructure Association (GSDI)

http://www.gsdi.org/

The CEOS Working Group on Information Services and Systems (WGISS)

http://wgiss.ceos.org/

International Organization for Standardization (ISO)

http://www.iso.org/

Open Geospatial Consortium (OGC)

http://www.opengeospatial.org/

International Steering Committee for Global Mapping (ISCGM)

http://www.iscgm.org/html4/index.html

American Society for Photogrammetry & Remote Sensing (ASPRS)

http://www.asprs.org/

Permanent Committee on GIS Infrastructure  for Asia & the Pacific (PCGIAP)

http://www.gsi.go.jp/PCGIAP/

International Cartographic Association (ICA)

http://www.geog.psu.edu/ica/

International Geographical Union (IGU)

http://www.igu-net.org/