Abstract
In conventional geodetic systems, locations of points on the surface of the earth may be defined either by means of natural (astronomic) or geometric (geodetic) coordinates. The natural coordinates, the astronomic latitude (Φ), longitude (Λ), and the orthometric (mean sea level height (H), being gravity dependent, are conventionally referenced to the geoid and are determined from “natural” observations (astronomic, gravimetric and spirit leveling). The geometric coordinates, the geodetic latitude (ϕ), longitude (λ) and height (h), are referenced to a (generally) rotational ellipsoid of arbitrary size, shape and orientation, and are determined from geometric (length and/or direction) observations.KeywordsTide GaugeEquipotential SurfaceVertical DataReference EllipsoidGeoid UndulationThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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