SOLAINLL. BELFIORE, P. 
President of the President of 
Scientific Commission Commission B. 
of aerial triangulations. 
Preliminary work of Commission B of the 
European Organization for Experimental Photogrammetric Research 
(O.E.E.P.E.) 
(Large-scale aerial triangulations) 
PROGRAMME AND ORGANIZATION OF WORK. 
The aim of Commission B of the OEEPE is experimentation in large-scale aerial 
triangulations. The preparation and the start of the work have presented various 
difficulties which had to be overcome. To accomplish the team work as recom- 
mended by the Secretary General required right from the establishment of the 
contacts in the beginning of 1954, the creation of an organization of all kinds of 
work on an international footing. 
Commission B takes its programme from the basic point as stated in art. 8 of the 
Statutes of the OEEPE: “an objective and sufficient comparison of the latest 
methods of aerial triangulation", but in the field of large scales. 
To achieve this aim within a reasonable time it was necessary to collect much 
original photographie material, to have the glass diapositives executed intended 
for the Centres interested in the restitution work, to distribute the material, to 
draw up by common consent the instructions for the execution and to choose the 
forms for the registration of the observations carried out in the restitution instru- 
ments. All these preliminary formalities have often been held up by the customs, 
who are not always acquainted with the European Union — to which we are 
trying to make our small contribution — nor with the efforts made by all mem- 
bers of the Organization. 
I have pleasure in expressing my thanks to all our colleagues of Commission B, 
who, by overcoming all these obstacles, enabled us to obtain and exhibit some 
results before the Congress in Stockholm. 
Our initial programme as set up in 1954, though perhaps somewhat optimistic, 
should enable us to complete the restitutions and compensations of the first flights 
carried out in Austria, before June 1956. Nevertheless, if we cannot yet show the 
members of the VIIIth International Congress for Photogrammetry the final 
results of the first restitution group, it may be observed that the aim is very 
nearly reached. 
We shall limit ourselves here to the programme of work; the methods applied to 
determine the ground control points, the taking of the photographs, the distribu- 
tion of instructions for the execution of triangulations and some details regarding 
the organization of the work on hand. We shall probably be able to distribute the 
results at the Congress. 
It is important to state all details of the programmes, of the instructions and of 
the work carried out have been the subject of elaborate investigations by the mem- 
bers of the Commission and of the Comité Directeur: many and long sessions 
have made it possible to coordinate the programmes of action and of development 
of the work on sound and accepted bases, the data have been communicated to the 
interested bureaux in good time.