(Campi Flegrei). The survey has been implemented by ground control with temperature 
measurements on water surfaces. The results are now in elaboration. 
Istituto Geografico Militare, Florence. 
The second part of the aerophotographic Atlas on the human settlements in Italy, 
edited by G. Schmiedt, has been published in 1970 (22). The volume offers an abundant 
aerophotographic documentation of the human settlements in Italy from prehistory to the 
Roman time. 
GEOMAP, Florence. 
The research activity includes two publications on new photointerpretation techniques 
for the survey of slope stability (9) and for hydrogeology (11). The first method allows 
the production of maps expressing the degree of danger of a certain area, through the in- 
terpretation on the airphotographs of all the factors influencing the slope stability, plus the 
landslide inventory and other objective data. The second technique refers to the evaluat- 
ion of all the surface data contributing to the hydrologic balance of a basin. A morpho- 
logic study on the variations of the Arno river in the Florence plain is now in course of 
publication (23). 
F. Gheri, Florence. 
An original photointerpretative technique has been presented by F. Gheri at the Acca- 
demia Economico-Agraria dei Georgofili in Florence, in 1969 (15). The technique refers to 
the quantitative elaboration of the agricultural settings annotated on airphotographs, in order 
to compare different levels of setting, in different areas or periods, to data of superficial 
water flowing speed, flood yield, and therefore help planning the soil defence. 
Among the single publications appeared in the last four years, we may quote a photo- 
geological study emphasized on structural interpretation on southern Tuscany and Umbria, 
by J. Bodechtel (7), and a review of the Gemini space photographs covering Libya, with 
geological] interpretation, edited by A. Pesce (20). The new edition of the Enciclopedia 
della Scienza e della Tecnica, edited by Mondadori, contains a new article on photogeology 
by P. Dainelli. 
PROFESSIONAL ACTIVITY AND EXPLORATION 
The photointerpretation, as practical application in mineral exploration, hydrogeology, 
agriculture and engineering, has noticeably developed in Italy in the last four years. In 
particular it is interesting to notice as photointerpretation is employed either as comple- 
mentary techinque, either as complete investigation method by various professional orga- 
nisations. 
AGIP Mineraria. 
Photogeology is employed as a routine exploration tool by the major Italian oil com- 
pany. In the last four years, photogeological work has been carried out by the AGIP 
laboratories or through service companies, in Italy, Mauritania, Tanzania, Saudi Arabia, 
Zambia, Madagascar, Somalia, Libya, Svalbard, Indonesia, for a total of 400,000 sqkm. 
ENEL Ente Nazionale per l’Energia Elettrica. 
A photogeological study has been done for geothermal exploration in central Italy, by 
the C.R.G., Florence. 
GEOMAP, Florence. 
This professional outfit, the activity of which is almost completely based on photo- 
interpretation work, has been reorganized in 1969, after the death of Prof. Enrico Mar- 
chesini. The projects carried out in the last four years can be resumed as follows. 
—  Photointerpretation for oil, mineral, natural steam exploration and hydrogeology, based 
on conventional photogeology, fracture analysis, study of morphology: Italy (17,500 
sqkm), Peru (96,000 sqkm), Yemen (1,000 sqkm), South Africa (237,000 sqkm), Egypt 
(28,000 sqkm), Kenya (20,500 sqkm), Somalia (10,000 sqkm), Chad (66,000 sqkm), 
Senegal (11,500 sqkm), Ivory Coast (28,000 sqkm), Congo (10,000 sqkm), Mauritania 
(250,000 sqkm), Spain (9,500 sqkm), Portugal (2,500 sqkm), USA (82,000 sqkm). 
—  Photointerpretation of slope stability, based on original techniques: for territorial plan- 
ning and soil defence: Italy (3,000 sqkm), Santo Domingo (15,000 sqkm); for highway 
construction: Italy (60 km). 
—  Photointerpretation for agriculture: land classification and land use: Turkey (14,000 
sqkm), Zambia (60,000 sqkm), Santo Domingo (5,000 sqkm); study of agricultural 
setting: Italy (600 sqkm). 
C.R.G. Centro Ricerche Geologiche, Florence. 
This organisation has been established in 1968 and is specialised in hydrogeology, con- 
sulting for engineering work, agricultural planning and natural resources evaluation. CRG 
largely employes photointerpretation. The major projects carried out are the following.