?Traditionally, the earth's surface has been modeled as a sphere, but the World Geodetic
Chapter 11, Problem 51(choose chapter or problem)
Traditionally, the earth's surface has been modeled as a sphere, but the World Geodetic System of 1984 (WGS-84) uses an ellipsoid as a more accurate model. It places the center of the earth at the origin and the north pole on the positive -axis. The distance from the center to the poles is
and the distance to a point on the equator is
.
(a) Find an equation of the earth's surface as used by WGS-84.
(b) Curves of equal latitude are traces in the planes . What is the shape of these curves?
(c) Meridians (curves of equal longitude) are traces in planes of the form What is the shape of these meridians?
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