Geodesy and Photogrammetry in the 1960's

by James C. Tison, Jr.,

Serial Information: Journal of the Surveying and Mapping Division, 1968, Vol. 94, Issue 1, Pg. 15-24

Document Type: Journal Paper

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.

Subject Headings: Photogrammetry | Geodetic surveys | Mapping | Aerial surveys | Triangulation | Satellites | Frames | North America | United States

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