COMMISSION II 
Appendix to the INT. A 
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PHOTOGRAMMETRY val YI 
  
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Reprinted from 
PHOTOGRAMMETRIC ENGINEERING 
April 
1956 
Instrumentation for the Integrated Photogrammetric 
System of the U. S. Geological Survey*i 
RUSSELL K. BEAN, U. S. Geological Survey 
MMEDIATELY after World War II a staff photogrammetry section was set up 
in the Topographic Division of the U. S. Geological Survey, with the prime 
objective of exploiting photogrammetry to its fullest through the medium of 
research. The attack on the problem was made simultaneously on three major 
fronts—aerial photography, photogrammetric instruments, and techniques and 
standards. Thus the concept of a "system" was evolved whereby all of the 
elements required to accomplish the goal of photogrammetrically compiling 
topographic maps more efficiently were considered as a unit, and the develop- 
ment work on any one element did not proceed until its effect on the system as 
à whole was determined. 
À prime consideration was the basic geometry of aerial photography. For a 
i This paper is a contribution to Commission II of the International Society of Photogram- 
y. 
| Publication authorized by Director, U. S. Geological Survey. 
U.S.A.-1