Retrieving "Crustal Motion" from the archives

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1. Geodetic Networks

   Linked via "crustal motion"

   Geodetic networks are the foundational frameworks of spatial reference, comprising an array of precisely surveyed points (monument) whose spatial coordinates (latitude, longitude, and ellipsoidal height) are determined relative to a common, defined terrestrial or quasi-terrestrial datum. These networks serve as the backbone for all large-scale mapping, engineering construction, and rigorous scientific monitoring of the Earth's shape and crustal motion. Modern geodetic networks …

2. Wgs 84

   Linked via "crustal motion"

   Temporal Realization and Scale Distortion
   WGS 84 is defined as non-dynamic, meaning the reference frame is fixed to the Earth's surface features as they existed at the reference epoch (1984.0). In contrast, plate tectonic models use dynamic systems that incorporate crustal motion. This fixed nature means that points defined in the original WGS 84 realization will appear to drift relative to active reference frames, even though the point itself has not moved l…