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geomorphology, soils and hydrology, forestry, and land capability for more than 
120,000 square kilometers in the central agricultural area of the country. In 
addition, sub-surface studies for minerals and petroleum were made using airborne 
geophysical methods. Although the various work elements that make up the Project 
in Chile have been used in other countries, nowhere have these elements been com 
bined in a single survey on such a broad scale as in Chile. 
Through the use of photographic and photogrammetric techniques and methods, 
the vast amount of information which was gathered and verified in a period of 40 
months could not have been obtained in a lifetime of work using conventional ground 
survey and exploration methods. Photogrammetrists know of the great advances in 
equipment and methods. It is essential to demonstrate to government leaders, to 
ministers and policy makers, to the economists, planners, industrialists, and 
engineers the enlarged capabilities of our art and science to provide them with 
vital basic resource data. It is important to point out that this work requires 
the careful guidance of thoroughly qualified experts to plan, direct and supervise 
the essential steps required for the successful execution of a resource inventory 
program. 
The Project in Chile, known as Proyecto Aerofotogrametrico-Chile was 
sponsored and financed by the joint efforts of the Organization of American States 
(OAS), the Government of Chile, and the Inter-American Development Bank. The work 
was accomplished by a consortium of four photogrammetric engineering companies, 
(Aero Service Corporation of Philadelphia; Fairchild Aerial Surveys of Los Angeles; 
Geotechnics and Resources of White Plains, New York; and Hunting Survey Corporation 
of Toronto, Canada) working in collaboration with Chilean scientists and 
technicians. The program was designed as a team effort to provide the Government 
of Chile with essential basic data needed for initial stages of reconstruction and 
rehabilitation of earthquake-damaged cities, for programs of land reform and taxa 
tion revision, and for projects as yet unplanned in the fields of transportation, 
power, irrigation, agricultural development and urban renewal. In accomplishing 
these objectives the project provided a broad inventory of natural resources to