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The geographic center of the United States is a point approximately 20 mi (32 km) north of Belle Fourche, South Dakota at 44°58′2.07622″N 103°46′17.60283″W. It has been regarded as such by the United States Coast and Geodetic Survey and the U.S. National Geodetic Survey (NGS) since the additions of Alaska and Hawaii to the United ...
The geographic center of the United States is northeast of Belle Fourche in Butte County, South Dakota while that of the contiguous 48 states is near Lebanon in Smith County, Kansas The geographic center of North America lies near Rugby, North Dakota ( 48°10′N 100°10′W / 48.167°N 100.167°W / 48.167; -100.167 ), though this ...
October 9, 1973. The Meades Ranch Triangulation Station is a survey marker in Osborne County [2] in the state of Kansas in the Midwestern United States. The marker was initially placed in 1891. From 1901, it was the reference location for establishing a system of horizontal measurement in the United States, known as geodetic datum.
A geodetic datum or geodetic system (also: geodetic reference datum, geodetic reference system, or geodetic reference frame) is a global datum reference or reference frame for precisely representing the position of locations on Earth or other planetary bodies by means of geodetic coordinates. [1] Datums [note 1] are crucial to any technology or ...
The Transcontinental Traverse (TCT) was a geodetic survey traverse conducted in the continental United States by the United States Coast and Geodetic Survey between 1961 and 1970 and the U.S. National Geodetic Survey between 1970 and 1976. It was the most accurate large-area survey ever done prior to Global Positioning System surveys.
The National Geodetic Survey ( NGS) is a United States federal agency based in Washington, D.C. that defines and manages a national coordinate system, providing the foundation for transportation and communication, mapping and charting, and a large number of science and engineering applications. Since its founding in 1970, it has been part of ...
Geodesy. The North American Datum ( NAD) is the horizontal datum now used to define the geodetic network in North America. A datum is a formal description of the shape of the Earth along with an "anchor" point for the coordinate system. In surveying, cartography, and land-use planning, two North American Datums are in use for making lateral or ...
The United States Coast and Geodetic Survey ( abbreviated USC&GS; known as the Survey of the Coast from 1807 to 1836; as the United States Coast Survey from 1836 until 1878) was the first scientific agency of the United States Government. It existed from 1807 to 1970, and throughout its history was responsible for mapping and charting the coast ...