Perü 
Instituto de Topografia y Geodesia. Universidad Na- 
cional de los Ingenieros, Lima 
  
Philippines 
Bureau of the Coast and Geodetic Survey, Manila 
  
Poland 
Office Central de Géodésie et Cartographie, 
Warszawa 
  
Polish Society of Photogrammetry, Warszawa 
  
Portugal 
Instituto Geografico e Cadastral, Lisboa 
  
Romania 
Institut Geographique National,Bucuresti 
  
Comité Roumain de Photogrammétrie, Bucuresti 
  
South Africa 
Department of Land Surveying, Cape Town 
  
Photogrammetric Society of South Africa, 
Johannesburg 
  
Spain 
Instituto Geografico y Catastral, Madrid 
  
Sudan 
Sudan Society of Photogrammetry. Ministry of 
Defence Survey Department, Khartoum 
  
Suisse 
Service Topographique Fédéral, Wabern 
  
Sweden 
Statens Lantmateriverk (National Land Survey of 
Sweden), Gävle 
  
Viak AB, Stockholm 
  
The National Swedish Road Administration, Stockholm 
  
Plankonsult AB, Stockholm 
  
Liber Grafiska AB. Photogrammetric Department, 
Vallingby 
  
Bjorn Gavelin AB, Umea 
  
'Thailand 
Royal Thai Survey Department, Bangkok 
  
Tunisie 
Direction de la Topographie et Cartographie, Tunis 
  
Turkey 
Harita Genel Mtüdurlugu, Ankara 
  
U.S.A. 
Defense Mapping Agency Topographic Center, 
Washington 
  
American Society of Photogrammetry, Falls Church 
(Virg.) 
  
Geological Survey, Reston 
  
Glavnos Ypravlenie Geodezii i Kartografii, Moscow 
  
  
  
Institut Geographique du Zaire, Kinshasa