The National Spatial Reference System (NSRS), which is managed by the National Geodetic Survey (NGS), is a coordinate system that includes latitude, longitude, elevation and other values. The NSRS consists of a National Shoreline; the National CORS, a system of Global Positioning System Continuously Operating Reference Stations; and a network of over one million permanent survey markers. National Geodetic Survey, formerly called the U.S. Coast and Geodetic Survey (U.S.C.G.S.), is a United States federal agency that defines and manages a national coordinate system, providing the foundation for transportation and communication; mapping and charting; and a large number of applications of science and engineering. Since 1970, it has been part of the National Oceanic and Atmospheric Administration (NOAA), of the U.S. Department of Commerce.
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