Research Article
Jan 1968

Geodesy and Photogrammetry in the 1960's

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Publication: Journal of the Surveying and Mapping Division
Volume 94, Issue 1

Abstract

The basic geodetic control network in the United States includes about 100,000 monumented first- and second-order horizontal control stations that are accurately related one to another, and whose positions are expressed in latitude, longitude, and State plane coordinates. This network provides the framework for mapping and charting, for cadastral and property surveys, etc. Its primary purpose is to provide: (1) Means of maintaining a given standard of accuracy over long distances; (2) a means whereby surveys or maps done at different places at different times can be connected into a coordinated whole; and (3) the means of reestablishing the position of any point that has been lost. The network, however, must be expanded and strengthened in order to meet the needs of all types of surveying. New methods of satellite triangulation and superaccurate geodimeter traverse are now providing a means of testing and strengthening the horizontal control network. Analytic aerial photogrammetry can now be considered a surveying tool of high accuracy.

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Journal of the Surveying and Mapping Division
Volume 94Issue 1January 1968
Pages: 15 - 24

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Published in print: Jan 1968
Published online: Feb 12, 2021

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James C. Tison Jr.
Rear Adm., Dir., Coast and Geodetic Survey, Environmental Science Services Admin., U. S. Dept. of Commerce, Washington, D. C.

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