Exercise Three

# Exercise Three - Geodetic Control Exercise Three 1 Compare...

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Geodetic Control Exercise Three 1) Compare four different height systems (ellipsoidal, orthometric, normal, and dynamic heights) and establish relationships among the four systems. Difference: 1, Reference Surface Ellipsoidal Height ’s reference surface is reference ellipsoid, Normal Height’s reference surface is quasigeoid, while both Dynamic Height Orthometric Height’s reference surfaces are geoid. 2, Definition Ellipsoidal Height: distance h along the surface normal between a point to the surface of the ellipsoid. Normal Height: the distance between the earth’s surface to the quasigeoid, along the plumb line of point Pi. Orthometric Height: The geometric distance between geoid and the point, along the plumb line of a point Pi. Since Negative of gravity potential difference between a point and the geoid Dynamic Height : Geopotential number divided by a constant gravity gR Ellipsoidal Height Ellipsoidal Height: distance h along the surface normal between a point to the

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Exercise Three - Geodetic Control Exercise Three 1 Compare...

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