Working Groups (WG): 
40 
(4)-l Digital Map Compilation and Cartographic 
Treatment of Digital Data. 
Chairman-: -J. Gauthier (Canada) 
i L 0-2 Revision and Accuracy of Topographic Maps. 
Chairman: Col. M.M.'Datta (India) 
(4)-3 Large Scale Integrated Mapping for Urban 
and Rural Planning, Engineering. 
(offered to South Africa) 
(4)-4 Mapping from Space-borne Photography and 
Non-metric Imaging Systems. 
(offered to USA) 
(4)-5 Orthophotography and Photomapping. 
(offered to Australia) 
(4)-6 Littoral Mapping. 
Chairman: E.O. Dahle (probable) (Norway) 
(4)-7 Integrated Resource Mapping. 
Chairman: A. Villasana (probable) (Mexico) 
(5) Non-Topographic Photogrammetry. 
President: Prof. Dr.-Ing. Torlegard (Sweden) 
(6) Economic, Professional and Educational 
Aspects of Photogrammetry. 
President: Prof. Dr. h. Z. Sitek (Poland) 
(7) Interpretation of Data. 
President: Prof. Dr. G. Hildebrandt (Germany, PR)