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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.
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 ).
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.
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).
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 ...
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 ...
The National Ocean Survey was renamed the National Ocean Service in 1983, [3] and thus the National Ocean Service, National Geodetic Survey, Office of Coast Survey, and NOAA Corps all trace their ancestry to the United States Coast and Geodetic Survey, and the NOAA fleet does in part as well.
The list below is a collection of available official national projected Coordinate Reference Systems. Links to the relevant unique identification codes of the EPSG Geodetic Parameter Dataset, the most comprehensive collection Coordinate Reference Systems, are provided in the table.