Chegg Textbook Solutions for Elementary Surveying An Introduction to Geomatics 13th Edition: Chapter 19

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    The Geoid is a surface with equal potential of gravitational force. It coincides with the global mean sea level. The Geoid is also everywhere perpendicular to the direction of gravity.


    A mathematical surface formed by revolving a specific ellipse about the earth’s polar axis is known as the ellipsoid. The specific ellipse is chosen such that the ellipsoid sets properly over the Geoid over a large area. The ellipse is also based upon various studies done in that area

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