Currently, which of the following ellipsoids is widely used for geodetic control in the United States?
A)Clarke 1866
B)Clarke 1880
C)World Geodetic System of 1984 (WGS 84)
D)Geodetic Reference System 1980 (GRS-80)

Question

Quizplus · Accepted Answer

The Global Reference System 1980 (GRS-80) ellipsoid is widely used for geodetic control in the United States. Although many ellipsoids are in use around the world, the GRS 80 is a global ellipsoid centered upon the Earth's center of mass. Local ellipsoids minimize differences between the geoid and ellipsoid for individual continents and/or countries.

Currently, Which of the Following Ellipsoids Is Widely Used for Geodetic