Tenth International Congress
on Photogramme try
Lisbon, Portugal September 1964
Commission III, Presented Paper
STATUS OF COMPUTATIONAL
PHOTOGRAMMETRY IN THE U.S.A.
'G. C. Tewinkel
U.S. Coast and Geodetic Survey
Abs trac t
Computational photogramme try is being applied in
several listed private and governmental facilities in the
United States for topographic information and for satellite
geodesy. The application of the monocomparator and the
PUG has played an important economic role in allowing the
technique to begin, although the stereocomparator is con
sidered to be the preferred instrument. Medium-size
computers are generally applied but the added economic
advantages of large computers is being appreciated. The
basis provided by Dr. Hellmut Schmid is applied almost
entirely, with the smaller facilities utilizing the pro
visional version introduced by the U.S. Coast and Geodetic
Survey.
Applications in the United States
Computational photogrammetry is being actively practiced
in at least five establishments in the U.S.A.: (1) Ballistic
Research Laboratory, Aberdeen, Maryland; (2) RCA Missile Test
Project. Cape Kennedy, Florida; (3) U.S. Coast & Geodetic
Survey (C&GS), Washington, D.C.; (4) Utility Data Corp.,
Kansas City, Missouri; and (5) Air Survey Corp., Arlington,
Virginia in cooperation with Autometric Operation of Alexandri
Virginia. The purpose of the work at (l) and (2) is for
ballistic applications for rockets, missiles and artificial
satellites and also for satellite geodesy; at (3) it is
being applied both to satellite geodesy and topographic
mapping (analytic aerotriangulation); and at (4) and (5) the
application is for topographic and cadastral uses.
The technique is also in various stages and modes of
application and experimentation and/or practice at several
other installations: (6) U.S. Army GIMRADA, Ft. Belvoir,
Virginia; (7) Army Map Service, Washington, D. C.; (8) U.S.