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PHOTO INTERPRETATION PICTURE, COLWELL 111
Evaluation of Photo Interpretation Keys. Photogrammetric Engineering 25(5),
Pp 858-864, 1957.
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ABSTRACT.
This paper first attempts to describe the most significant developments in photo
interpretation that have taken place since the Commission on Photo Interpretation of
the International Society for Photogrammetry was founded in 1952. Among these devel-
opments are the following:
1. The field encompassed by photo interpretation has become much more clearly
defined;
2. The first definitive book on photo interpretation has been prepared and is soon
to be published under the title “Manual of Photographic Interpretation”;
3. The importance of photo interpretation as an aid in discovering and evaluating
natural resources has been officially recognized at the highest levels;
4. A rational view regarding the merits and
pretation keys is gradually emerging;
5. Photo interpretation is invading several fields in which it was relatively un-
known until recently;
limitations of photographic inter-
6. The importance of terrestrial photo interpretation is rapidly increasing;
7. The value of multiband spectral reconnaissance is gradually being recognized;
8. Valuable means for enhancing the quality of photographic images have recently
been developed and
9. There is an increased interest in the use of very low-altitude, large scale photo-
graphy for making detailed interpretations.
The paper then considers some of the current needs in photo interpretation. The
following specific needs are mentioned:
1. Much research is still needed in relation to the human factors in photo inter-
pretation;