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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

The result of triangulation from the unified network of survey monuments was the North American Datum of 1927 (NAD 27) and later the more accurate NAD 83, ...

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, ...

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

The two horizontal datums used almost exclusively in North America are North American Datum (NAD) 1927 and NAD 1983.

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

"North American Datum" as used in this report means the whole system of geodetic control points of North America that is now referred to the Clarke Spheroid of ...

confluence.qps.nl/pages/viewpage.action?pageId=29855153

Jul 12, 2016 ... The North American Datum 1983 (NAD83) is a geocentric datum that was established in 1986 for the United States, Canada, Mexico, Central ...

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

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 datum used in.

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.

spatialreference.org/ref/sr-org/north-american-datum-1983

SR-ORG Projection 15 - North American Datum 1983. Home | Upload Your Own | List user-contributed references | List all references. Previous: SR-ORG:14: ...

www.slideshare.net/RHC2008/history-of-north-american-datums-2093349

Sep 29, 2009 ... Brief History of North American Horizontal Datums New England Datum of 1879 United States Standard Datum of 1901 North American Datum ...