Retrieving "Geocentric" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. World Geodetic System 1984

   Linked via "geocentric"

   Origin (Center of Mass)
   WGS 84 is an Earth-Centered, Earth-Fixed (ECEF) system. Its origin is defined as the center of mass of the Earth ($M_{\oplus}$). Unlike earlier systems such as the Clarke 1866 Ellipsoid, which were constrained by terrestrial surveying methods and local vertical datums, WGS 84 is [geocentric](/entries/geocen…

2. World Geodetic System 1984

   Linked via "geocentric"

   Relationship to Other Datums
   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](/entries/world-geodetic-sy…