ITALY
General Direction of Cadastral Survey and of the Technical Services
of Finance Department
Rules for the accomplishment of air photogrammetric
surveys on large scale
Communication by the General Director Prof. GIOVANNI BOAGA to the
7th International Congress of Photogrammetry — Washington 1952
As is known, Italy has been the first Nation that concretely applied air
photogrammetry for cadastral mapping, i. e. for cartographic elaborations on
large scales (general scale 1:2000, particular scales 1:500, 1:1000 and 1:4000),
having a high degree of accuracy.
Already in 1934 the Italian Cadastral Survey presented to the 4th Inter-
national Congress of Photogrammetry at Paris the first cadastral map obtained
by means of the aerophotogrammetric method. Besides the usual planimetric
design, this map contained also the altimetric representation by means of con-
tour lines and spot heights.
Since that time and after having overcome the initial difficulties, air pho-
togrammetry has become progressively more important among the surveying
methods used for cadastral mapping in Italy; from year to year larger areas were
surveyed by means of the new method.
It stands to reason that for the application of air photogrammetry to ca-
dastral purposes, particular studies and researches were needed at the beginning
as well as during the following period of development. A particular experience as
regards application was so gathered and used for the elaboration of apposite
surveying rules by means of which a good result of work is assured to the Ca-
dastral Administration.
At first only summary regulations with regard to photogrammetric pro-
ceedings were issued by the Cadastral Administration in collaboration with the
private enterprises charged with the accomplishment of surveys, while particu-
lar attention was directed to opportune testings during the single working cycles
(preliminary testing) as well as after the completion of work (final testing).
At that time, a particular importance was attributed to the preliminary
testing, which consisted of a series of controls and determinations carried out
