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ANALOGICAL AERIAL TRIANGULATION BY MEANS
OF MOD. Ill GALILEO-SANTONI STEREOSIMPLEX
•a
by Mario Fondelli, Eng. D.
Summary: The A. explains the procedures suggested to realize analogical aero-
triangulation at the Model III Galileo-Santoni Stereosimplex, a non-universal plotting
instrument, and finally reports the results of some tests and work carried out in this
field with the said instrument.
1. How to carry out analogical aerial triangulation with non universal
stereoplotters, has been the subject of studies and researches for quite
some time. This may in fact open up new possibilities to these instru
ments and at the same time improve the economy of several aero-
photogrammetric surveys at small and medium scales.
The main features of how best to use the Model III Galileo-
Santoni Stereosimplex — a stereoplotter of the said category — for
aerial triangulation have already been evidenced (1).
Cs In view of the need to test its possible appliance to normal survey
work at medium scale, and to get a better knowledge of its actual in
trinsic possibilities, EIRA of Florence have carried out some tests of
instrumental bridging using precision grid plates and actual pho
tographs.
The conclusions derived from these experiments allow to clarify
some observations made on another occasion about this instrument (1),
and particularly stress which operational pratice should be preferred
in the different works of analogical aerotriangulation carried out there
with. We think they are worth while reporting at this Congress in
order that they may be the subject of more accurate consideration and
evaluation.
2. It is known that aerotriangulation is performed by means of plotting
equipment- of non-universal type and not allowing a base reversal
transporting from one camera to the other — with their respective
parameters of outside angular orientation — the photographs which,
during bridging operations, transfer the absolute orientation derived
from the starting stereogram. This practice, considering the various
