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1. Geodetic Networks

   Linked via "datum"

   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 …