1 
Chapter 1 
INTRODUCTION 
by 
Gino Cassinis, President of the Group. 
Mariano Cunietti, Secretary of the Group. 
1 - GENERAL CONSIDERATIONS 
At the beginning of this Report, we should inquire into the origins of the expe 
rimental proofs organized by Commission III or by other Commissions of the Interna 
tional Society of Photogrammetry, not so much for mere information, as in order to 
research in the intentions of those who proposed and solicited them, a more direct 
and significant information about their scientific and technical purposes. Moreover, 
an analysis of the origins will make it possible to see not only the modifications suffered 
by the first design, but also the reasons justifying these variations. 
In fact, if we want, in the drawing up of this final Report, to adequately 
answer the expectations it is useful to individuate what they are, even if, as we shall 
see, the result of this work can only partially satisfy them. 
Prof. Wiser, in his report presented in Stockholm, on the results of the « Essai 
Contrôlé n° 1 », refers synthetically about the essential historical news on the birth 
of these researches 1 ). Therefore, we send to that paper the reader desirous of more 
detailed news. However, for the clearness of our whole work, we cannot help, here, 
examining and analysing the contents of these initial proposals. 
The features that could be ascribed to this work are two: the first one absolutely 
scientific, the other technical and practical. But both of these aspects had to be 
inserted into a schema of international collaboration, that constituted the real origi 
nality of the proposal. 
It is not the first time that in Science and in Technique an international colla 
boration has been roused; however, this collaboration usually meant a co-operation 
to a scientific research or a union of forces to obtain a common result, on wider practical 
fields. 
x ) Prof. Dr. Wiser: Procès-Verbal de VEssai Contrôlé n. 1 (Aérotriangulation).