Retrieving "Ellipsoid Parameters" from the archives

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1. Geodetic Datum

   Linked via "ellipsoid parameters"

   A geodetic datum is a reference system used in geodesy, cartography, and surveying to define the size and shape of an idealized ellipsoid (reference surface)/) (the reference ellipsoid) and the origin and orientation of the coordinate system tied to it. It provides the necessary mathematical framework to relate specific coordinates (latitude, longitude, and height) to a tangible point on the [Earth's physical surface](/e…

2. World Geodetic System 1984

   Linked via "ellipsoid parameters"

   | WGS 84 (G2139)/) | 2000.0 | Adjustment for Lunar Laser Ranging (LLR) Artifacts | Current Navigational Default |
   It is imperative to note that all these realizations utilize the identical ellipsoid parameters ($a$ and $f$). The differences lie solely in the transformation parameters that map coordinates from the instantaneous physical surface (the realization) back to the fixed, idealized [ellipsoid model](/entries/ellipsoid-m…