Open Geospatial Consortium:
2300 Wilson Blvd, Suite 700, #1026
Arlington, VA
22201, USA

UK Office:
Open Geospatial Consortium Europe, Ltd
275 New North Road, Suite 1786
London
N1 7AA, UK

Belgium Office: 
OGC Europe iVZW
Technologielaan 3, B-3001
Heverlee, Belgium