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decide upon photographic material and plotting equipment. It is only the test 
area which is the same for all participants. On the other hand, the task of IS,P 
is not only to do photogrammetric research but also to stimulate the use of 
photogrammetry by undeveloped countries. Therefore besides »Essais contrôlés» 
experiments as carried out up to this time by Commission IV — 2 should be 
continued. 
Ce n’est que la région qui est la même pour tous les participants, qui sont libres à choisir leur 
photos et instruments. La SIP devrait stimuler l’emploi de la photogrammétrie dans les pays 
moins développés, et pour cette raison les essais devraient être poursuivis. 
Mr. Janicot: OEEPE is a research agency, whereas ISP encourages its members 
to study problems which are of special interest to them. The main difficulty is 
the selection of these problems and in the preparation of the test area. Speaking 
for IGN, he promised full support and cooperation, as in the past. 
La difficulté principale concerne le choix des problèmes et la préparation de la région. L’IGN 
continuerait à fournir son appui et coopération. 
Prof. Schermerhorn: Stressed the fact that the OEEPE studies not only 
theoretical but also practical aspects of photogrammetry. In order to have a 
greater variety of statistical material he suggested that countries like Canada 
should make available the material of their experimental work. 
Les études de l’OEEPE sont pratiques aussi bien que théoriques. Afin d’augmenter le matériel 
statistique il serait utile si les pays comme le Canada mettaient à disposition les résultats de leurs 
expériences. 
Chairman: Concluded the discussion, and introduced the next item viz. the 
question of the best organization of Commission IV. In the discussion it was 
generally agreed that the present organization is satisfactory, i.e. a subdivision 
into three sub-commissions covering cadastral, urban, and small-scale mapping. 
L’organisation actuelle de la commission est considérée satisfaisante. 
Schermerhorn: With reference to the suggestion by Col. Andrews that an 
interim meeting of Commission IV be considered, he suggested that an op 
portunity will occur in connection with the International Geodetic and Geo 
physical Congress in Toronto, Canada, in September, 1957. 
Une occasion de tenir la réunion proposée de la commission pourrait être fournie au moment 
du Congrès géodétique au Canada en 1957. 
General agreement was expressed. 
Joint Session II, III and IV July 20, 1956 
For the minutes from the joint session of commissions IV, II and III about 
small-scale-mapping, see Commission II, minutes of July 20, page 171, and 
Commission III, page 21(5. 
Session July 20, 1956, at 15.30 (b) 
The President opened the session and declared that the subject would be 
the »essais contrôlés» under sub-commission 1 of commission IV. Mr. Andrews 
handed the meeting over to the head of sub-commission 1 on cadastral mapping, 
Dr. H. Harry, Switzerland. 
Hcirry: Rapport sur la 
Photogrammétrie de 
précision pour l’établisse 
ment de plans cadastrais 
aux échelles grandes. 
(Publ. Arch. part 3) 
Dr. Harry began with a report of commission IV: 1 entitled: »Rapport sur 
la Photogrammétrie de précision pour rétablissement de plans cadastrais 
aux échelles grandes». See also the General Report of Commission IV. 
Summary: