- American Congress on Surveying and Mapping
http://www.acsm.net/ - American Society for Photogrammetry and Remote Sensing
http://www.asprs.org/ - Association of American Geographers
http://www.aag.org/ - Cartography and Geographic Information Society
http://www.cartogis.org/ - Geospatial Information & Technology Association: Wisconsin Chapter
http://www.gita.org/?page=chapters - GIS Certification Institute
http://www.gisci.org/ - University Consortium for Geographic Information Science
http://www.ucgis.org/ - Urban and Regional Information Systems Association (URISA)
http://www.urisa.org/