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REPORT OF COMMISSION VII 25
having little or no previous experience at working with aerial photographs have
been led to expect too much information to come directly from the photographs,
rather than from ground study or from other sources. In addition, some of these
men have known too little of how to extract from the photographs such informa-
tion as is available. Their high hopes and initial failures in the use of aerial
photographs have in some cases resulted in such bitter disillusionment that they
have abandoned further consideration of aerial photography as a useful tool.
To avoid recurrence of this misfortune, a clear understanding is needed of
both the advantages and limitations of photo-interpretation; an understanding
also is needed of possible ways for overcoming some of the limitations by means
such as have just been discussed. With the sound judgment that comes from
such an understanding, photographic interpretation can look forward at mid-
century to an ever-broadening horizon.
ACKNOWLEDGMENTS
Grateful acknowledgment is hereby made to the following international
reporters to Commission VII from whom much of the material in this and the
succeeding parts of this report was received: Mr. Aarne Rainesalo—Finland,
Monsieur le Major Baetsle—Belgium, C. A. J. van Frijtag Drabbe—Holland,
Captain R. Thoren—Sweden, Monsieur le Dr. Edouard Imhof—Switzerland,
Prof. Dr. Carl Troll—Germany, Dr. Wolfgang Pillewizer—Germany, Mr.
Giulio Schiedt—Italy (Military), Dr. Ing. Duilio Cosma—Italy (Resource
Invent.), Prof. Ing. Alfredo Paroli—Italy (Geology and Engineering).
LITERATURE CITED
NOTE: In the interest of conserving space only those articles cited in Part I of the Commission
VII Report are included in the following list. For a more complete listing of publications pertinent
to various phases of photo-interpretation, the reader is referred to the bibliographies appearing
at the end of Parts II and III of this Report and to the bibliography at the end of Chapter XII of
the revised MANUAL OF PHOTOGRAMMETRY.
Aschenbrenner, Claus, "The Interpretation of Tridimensional Form from Stereo Pictures,"
PHOTOGRAMMETRIC ENGINEERING, Vol. 18, No. 3, 1952.
Blackwell, H. R., “Contrast Threshold of the Human Eye,” Journal Optical Society of America,
Vol. 36, No. 11, pages 624—643, 1946.
Colwell, R. N., “New Techniques for Interpreting Aerial Color Photography,” Journal Forestry,
Vol. 48, No. 3, pages 204-205, 1950.
Eardley, A. J., “Aerial Photographs Their Use and Interpretation,” Harper and Bros. N.Y. 203
pages, 1942.
Heyden, F. J., “Photogrammetry in Astronomy,” PHOTOGRAMMETRIC ENGINEERING, Vol. 16, No.
1, pages 66-73, 1950.
Jensen, H. A. and Colwell, R. N., “Panchromatic vs. Infrared Minus-blue Aerial Photography for
Forestry Purposes in California,” PHOTOGRAMMETRIC ENGINEERING, Vol. 25, No. 2, pages 201—
223, 1940.
Macdonald, D. E., "Calibration of Survey Cameras and Lens Testing," PHOTOGRAMMETRIC
ENGINEERING, Vol. 17, No. 3, pages 383-389, 1951.
Macdonald, D. E., “Good Pictures vs. Bad Pictures,” PHOTOGRAMMETRIC ENGINEERING, Vol. 18,
No. 3, 1952.
McNeil, G. T., “Photogrammetric Analysis of Image Motion Compensation,” PHOTOGRAMMETRIC
ENGINEERING, Vol. 17, No. 4, pages 581-588; 1951.
Middleton, W. E. K., “The Attenuation of Light by the Atmosphere,
NEERING, Vol. 16, No. 5, Pages 663-672, 1950.
Moessner, K., “A Crown Density Scale for Photo Interpreters,
pages 434—436, 1947.
O'Neill, H. T. and Nagel, Wm., “The O'Neill-Nagel Light Table," PHOTOGRAMMETRIC ENGINEER-
ING, Vol. 18, No. 1, Pages 134-139, 1952.
Owen, D. M., “Deep Sea Underwater Photography and Some Recent Stereoscopic Applications,”
PHOTOGRAMMETRIC ENGINEERING, Vol. 17, No. 1, Pages 13-19, 1951.
" PHOTOGRAMMETRIC ENGI-
" Journal of Forestry, Vol. 45, No. 4,
