aerial photography
[Film Technology]
[Film Technology]
Special cameras are often
equipped with several lenses and large film magazines and set in vibration-free mountings on
aeroplanes. They are used in extensive land surveys for map-making, for
studying the growth of cities for town planning, for detecting traces left by
ancient civilizations, and for observing land use and the distribution of
animal populations and vegetation. Cameras mounted in satellites [satellite mounted cameras] are
also used for such photography. A special application of aerial photography is
military surveillance and reconnaissance; some reconnaissance satellites are
equipped with cameras having objectives of long focal lengths that produce
images, of very high resolution, on which cars, or even smaller objects, can be
recognized. Advanced satellite photographic methods, which until recently were
used almost exclusively by military, intelligence, and weather agencies, are
increasingly being employed by geologists to uncover mineral resources and by
news organizations to obtain instantaneous photographs of distant news events.
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