orientation for Chilean agronomists and geographers in photo interpretation and 
to create a legend for the classification of land use. 
The preliminary photo-interpretation of land use was accomplished directly on 
the aerial photographs. An experienced supervisor edited the photographs and 
returned them to the interpreters as a means of further training and improvement 
of their skill. The corrected land use pattern, together with its classification 
in accordance with the 34 category system which was established, was transferred 
to the 1:20,000 mosaic sheets. The diverse experience of the Chilean personnel 
assigned to the Project and their familiarity with wide areas of Chile and the 
agricultural variations of each helped greatly in solving the land use identifica 
tion problems. 
Field checks were run on each of the 1:20,000 mosaic sheets to verify and 
correlate the information determined by photo interpretation. The field editors 
prepared a short report concerning each sheet, giving the general and specific 
facets of agricultural land use encountered. These reports, together with the 
annotations on the overlays to the mosaics, provide a descriptive indication of 
the changes of land use from zone-to-zone within the project area. Figure 4 demon 
strates the information contained on a typical land use overlay. 
More than 250,000 land use areas were mapped. The information obtained 
through this survey provides data for general and specific agricultural planning. 
It includes the distribution of agricultural, industrial, forest and other land 
uses and their evaluation throughout the Project area. When combined with other 
information produced by the Project, it provides an evaluation of the current 
utilization of land resources within the country. The measurement of a land use 
in the properties covered by the property mapping program also provides a statis 
tical evaluation for both individual property holdings and for the country at 
large. 
Geology and Geomorphology 
Through a combination of photo-interpretation and field investigations, the 
Project provided information on the shape of the lands, slopes and the origin of 
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