U.S. National Geodetic Survey

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. It measures the land and then draws maps. It also measures magnetic fields and tides. Congress started it in 1807 to draw maps of the coasts.^[1] It helps transportation and communication; mapping and charting; and many science and engineering uses. Since 1970, it has been part of the National Oceanic and Atmospheric Administration (NOAA), of the United States Department of Commerce.^[1]

1. ↑ ^{1.0 1.1} "Coast and Geodetic Survey Heritage = NOAA Central Library". Archived from the original on December 19, 2015. Retrieved January 13, 2012.

Wikimedia Commons has media related to United States Coast and Geodetic Survey.

• National Geodetic Survey website
  • early history of the Coast Survey Archived 2009-06-28 at the Wayback Machine
  • NOAA Office of Coast Survey
  • U.S. Coast and Geodetic Survey Annual Reports, years 1837–1965
• Timeline Archived 2012-01-05 at the Wayback Machine at Arlington National Cemetery website
• Explanation of survey monuments
• 1858 map: Preliminary chart of entrance to Brazos River hosted by the Portal to Texas History.
• 1853 map: Preliminary chart of San Luis Pass, Texas hosted by the Portal to Texas History.
• 1854 map: Preliminary survey of the entrance to the Rio Grande, Texas hosted by the Portal to Texas History.