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en.wikipedia.org/wiki/North_American_Datum

The North American Datum (NAD) is the datum now used to define the geodetic network in North America. A datum is a formal description of the shape of the ...

gisgeography.com/geodetic-datums-nad27-nad83-wgs84

Aug 27, 2017 ... Datum Transformations: NAD27 Shift to NAD83 NAD27 Shift to NAD83 (Image credit: NADCON - North American Datum Conversion Utility).

desktop.arcgis.com/en/arcmap/10.3/guide-books/map-projections/north-american-datums.htm

The North American Datum of 1983 is based on both earth and satellite observations, using the Geodetic Reference System (GRS) 1980 spheroid. The origin for ...

www.ngs.noaa.gov/web/surveys/NA2011

Alignment of passive control with the latest realization of the North American Datum of 1983: NAD 83(2011), NAD 83(PA11), and NAD 83(MA11) Epoch 2010.00.

www.ngs.noaa.gov/faq.shtml

May 16, 2017 ... The North American Datum of 1983 (NAD 83) is the horizontal control datum for the United States, Canada, Mexico, and Central America, ...

www.ngs.noaa.gov/TOOLS/Nadcon/Nadcon.shtml

Jun 2, 2017 ... The readjustment of the North American Datum of 1927 (NAD 27), Old Hawaiian Datum and Puerto Rico Datum to the North American Datum of ...

www.ngs.noaa.gov/PUBS_LIB/NADof1983.pdf

OAA -. Professional Paper NOS 2. Avº, NORTH AMERICAN. ; DATUM OF 1983. Charles R. Schwarz. Editor. National Geodetic Survey. Rockville, MD 20852.

www.georepository.com/datum_6267/North-American-Datum-1927.html

North American Datum 1927 is a geodetic datum first defined in 1927 and is suitable for use in North and central America: Antigua and Barbuda. Bahamas.

www.differencebetween.net/miscellaneous/difference-between-nad-27-and-nad-83

Jul 28, 2011 ... NAD 27 vs NAD 83 The North American Datum, or NAD, is the official geodetic datum that is prevalent in North America. There are two kinds of ...