ITALY 
  
General Direction of Cadastral Survey and of the Technical Services 
of Finance Department 
Photogrammetric activity 
of the italian Cadastral Survey 
Communication of the General Director of Italian Cadastral Survey 
Prof. GIOUANNI BOAGA 
to the 7th International Congress of Photogrammetry at Washington, 1952. 
After preliminary and favourable trials regarding the possibility of using 
air photogrammetry for the cadastral survey (experimental survey of the Mu- 
nicipalities of Campagnano, Latina and Carmignano carried out in 1933), the 
Administration of the Italian Cadastral Survey from the year 1934 onwards 
vastly favoured air surveying methods for cadastral mapping. 
With this Italy stands in the vangard, since it is her achievement to have 
been the first country experimenting and obtaining concrete results in the field 
of aerial mapping for cadastral purposes. 
It are now more than 20 years since these first experiments were carried 
out and our country has made a steady and growing progress in this field. 
With the new method the Provinces of Terni and Viterbo as well as a 
major part of those of Belluno, Florence, Novara, Rome, Sondrio and Vercelli 
have been surveyed. : 
The air surveyed areas show the most different topographic features, 
from flat ground to hills, from medium mountains to high mountains, and 
cover a total of 750.000 ha. At the moment a remainder of 56.393 ha is in the 
course of being surveyed. 
The scale used for cadastral mapping. according to legislative rules is 
the usual one of 1 : 2000 and a special one of 1:1000 for small parcelled areas 
and for inhabited centers, whereas 1 : 4000 is used for large parcelled areas. In 
some rare case scale 1 : 500 is used for certain small areas where landed pro- 
perty is very broken up. 
Maps obtained with the classic methods of ground survey contain only 
planimetry, while maps plotted from air photographs ‘contain also contours. 
For areas with little variation in height, indication of spot heights is used. 
In this manner the maps, besides the normal use for civil and fiscal pur- 
poses, gain in value for their usefulness for technical aims, since they are real 
topographic maps on a large scale, fit for the elaboration of projects, town- 
planning, etc.