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Transactions of the Symposium on Photo Interpretation

Literature cited
Gharlesworth, J. K. The Quaternary Era, with Special Reference to its Glaciation, Vol. 1,
Edward Arnold, London, p. 177, 1957.
Gould, L. M. Glaciers of Antarctica. Am. Philos. Soc. Proc., Vol. 82, No. 5, p. 836, 1949.
Roscoe, J. H. Regional Photo Interpretation Series-Antarctica. U.S. Air Force Manual,
AFM 200-30, August 1953.
Thiel, Edward. Antarctica, One Continent or Two. The Polar Record, Vol. 10, No. 67,
January 1961.
U.S. Army Snow, Ice and Permafrost Research Establishment. Problems in Mapping Snow
Cover. SIPRE Report No. 27, December 1956.
Mr. Muhlfeld (B.R.D.): Is it possible to put oblique photographs into a plotter in order
to draw contour lines? Answer: Yes, it is possible to plot contour lines from high oblique
photographs with certain mechanical plotters. There must be, of course, sufficient detail on
the ground to permit stereoscopic fusion. Among the instruments that can be used are the
Zeiss Stereoplanigraph and the Santoni No. 4. Certain optical projectors such as the Kelsh
plotter can be modified to accomodate high oblique photographs and can also be used to
plot contours. High oblique photographs produced by the German Antartic Expedition of
1939 were later plotted with the Zeiss Stereoplanigraph.
R. G. Heller (U.S.A.): Was aerial navigation accomplished visually or electronically?
Answer: Some of the aerial photography has been flown by visual contact of the terrain features
such as the coastline. The Ronne Antarctic Research Expedition of 1947-’48 produced much
photography flown in this fashion. The U.S. Navy Highjump Expedition of 1947-’48, which
produced the greatest amount of aerial photography, employed radar between ship and air
craft to facilitate navigation.
Dr. A. P. A. Vink (Netherlands): Was super-wide angle photography ever considered for
the Antarctic or are there special disadvantages? Answer: We look forward to the use of super
wide angle photography. The extra large coverage will make it possible to reach ground
control on fixed terrain points such as nunataks; the possibility of making large-scale maps
(larger than 1 : 50,000) will be facilitated; photo interpretation of ice and snow features will
also benefit from this type of photography.