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

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.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.usgs.gov/faqs/how-large-north-american-datum-nad-27-nad-83-shift

Generally, for the conterminous United States, the North American Datum (NAD) shift amounts to about 210 meters. This shift occurs because of the change in ...

earth-info.nga.mil/GandG/coordsys/onlinedatum/CountryNorthAmericaTable.html

North America Datums Table. Local Geodetic Datums, Reference Ellipsoids and Parameter Differences. No. of Satellite Stations Used. Transformation ...

www.ask.com/youtube?q=North+American+Datum&v=hHJyIqiVSIs
Jan 14, 2016 ... The North American Datum is the datum now used to define the geodetic network in North America. A datum is a formal description of the ...

www.apsg.info/Resources/Chapters/US%20West/2013.01.18_USWest_Jan_Van_Sickle_NorthAmericanHorizontalDatums.pdf

United States Standard Datum the name was changed again to North American Datum. 1913. Further adjustments were required because of the constantly ...