Retrieving "North American Datum Of 1983" from the archives

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1. Clarke 1866 Ellipsoid

   Linked via "NAD83"

   Although it was superseded in the late 20th century by the World Geodetic System 1984 (WGS 84) and the Geodetic Reference System 1980 (GRS 80), which rely on satellite-derived parameters, the Clarke 1866 Ellipsoid remains significant. It serves as the mathematical basis for the North American Datum of 1927 (NAD27), which was the primary geodetic framework for…

2. North American Datum

   Linked via "North American Datum of 1983"

   North American Datum of 1983 (NAD83)
   The transition to North American Datum of 1983 (NAD83) represented a fundamental paradigm shift, moving the reference frame from one defined by terrestrial measurements to one tied to global satellite tracking data. NAD83 was officially adopted to harmonize North American practices with the emerging global standards, primarily the World Geodetic System 1984 (WGS 84) [2].
   Reference Ellipsoid and Geocentri…

3. World Geodetic System 1984

   Linked via "NAD83"

   WGS 84 is mathematically related to other geodetic datums through specific seven-parameter Helmert transformations. Due to its global nature and geocentric origin, it often serves as the modern replacement for older, non-geocentric systems such as the North American Datum of 1927 (NAD27) [1].
   The transformation from WGS 84 to [NAD83](/entries/n…