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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.
Primarily from the United States Government Printing Office Style Manual. [1] State names usually signify only parts of each listed state, unless otherwise indicated. Based on the BLM manual's 1973 publication date, and the reference to Clarke's Spheroid of 1866 in section 2-82, coordinates appear to be in the NAD27 datum.
Survey markers, also called survey marks, survey monuments, or geodetic marks, are objects placed to mark key survey points on the Earth's surface. They are used in geodetic and land surveying . A benchmark is a type of survey marker that indicates elevation ( vertical position ).
Benchmarking, also known as benchmark hunting, [1] is a hobby activity in which participants find benchmarks (also known as survey markers or geodetic control points). The term "benchmark" is used only to refer to survey markers that designate a certain elevation , but hobbyists often use the term benchmarks to include triangulation stations or ...
The North American-Pacific Geopotential Datum of 2022 (NAPGD2022) is a new geodetic datum set to be produced by the U.S. National Geodetic Survey in 2025 or 2026 to improve the National Spatial Reference System (NSRS).
U.S. Geological Survey; National Geodetic Survey; American Congress on Surveying & Mapping; TRS data to latitude/longitude calculator - for 17 western U.S. states; www.resurvey.org - reference for land surveyors working in the PLSS; Federal Township Plats of Illinois, 1804-1891 from the Illinois State Archives Archived 2010-04-07 at the Wayback ...
Compass rose on top of monument (2014). The monument stands just south of the White House at the north edge of the Ellipse, within President's Park.Atop the monument is a bronze 16-point compass rose with a very small worn-down pyramid at its center whose top serves as a National Geodetic Survey benchmark (HV1847).
As of 1917, if the President of the United States transferred the Coast and Geodetic Survey during a national emergency from the U.S. Department of Commerce to either the U.S. Department of War or the U.S. Department of the Navy, [54] commissioned officers of the Coast and Geodetic Survey assumed the following relative ranks while serving under ...