"mation 
strips — 
poses — 
inates — 
g infor- 
ap and 
uments 
relating 
mation 
ersonal 
rappor- 
« Gene- 
s Mem- 
S. 
ogram- 
ametric 
urgent 
To our advise the I.S.P. should authorise all Commission-Presidents to extend 
their field of search for enquiry and information, beyond the borders of I.S.P. member 
countries themselves. 
In this way only, it is possible of hoping to reach a really world-wide vision of 
practical activity in the domain of Aerial Triangulation. 
c) On the whole, replies to the questionnaire are exhaustive and fully answe- 
ring the general purpose of the questionnaire itself. We are glad to acknowledge this, 
and wish to thank most warmly and publicly all Commission III rapporteurs in the 
different Countries that have so usefully collaborated to the work of the Commission. 
After a first examination of the information received, all the material gathered- 
up was revisioned, to give it a more organic character, which in its general lines still 
continues to follow the classification adopted in the questionnaire, save more modi- 
fications generally suggested by the need of a better synthesis. 
The criterion followed for presenting information is the one adopted in almost 
all preceding reports, namely to condense all information-material into synthetic ta- 
bles, permitting an immediate vision of the operating variants of the different procee- 
dings. 
However, contrary to preceding Reports it was thought preferable to build-up 
considerably large tables containing all the information concerning a specified working 
proceeding in its various stages instead of sub-dividing it into several smaller tables. 
Thus it is made possible a correlated examination of the working differences in the 
various stages namely, to follow both through analysis and along the lines and columns, 
how proceedings change in relation to problems particular of each Country or Agency. 
The tables total 7: 
the first contains all general character information: the second, third and fourth all 
the other various ways to carry out triangulations per strips, or instrumental, analyti- 
cal and radial ones: the fifth, sixth and seventh all the different working proceedings 
for block-triangulations, or instrumental, analytical and radial ones, as well. 
The different countries are here listed by alphabetical order, whilst both private 
and public Organizations appear in order of rotation as communicated to us by the 
rapporteur, in his reply to the questionnaire’s general part. 
2. - FUNDAMENTAL NOVELTIES — THE ANALYTICAL AERIAL TRIANGULATION 
Announced in advance by some notes of a scientific character at the Stockholm 
Congress, the real novelty brought out in the field of aerial triangulation during the 
last four years, is the Analytical Aerial Triangulation. 
The sudden appearance and adoption of this new technique could very well be 
compared to a sudden explosion, as it has not only required new orientations of ope- 
rating character but it has demanded the contruction of new instruments based on 
new principles and necessities. 
As it can be seen by the details contained in tables III and VI, in four years 
we have passed from the phase of a simple scheming idea, to the one of its productive 
application in the practical field. 
Naturally, between these two extreme points, the intermediary phases of planning, 
experimentation and the study of results, were not lacking. 
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