Question

The ellipsoid is a:
(a) Gravimetric model of Earth
(b) Mathematical model of Earth
(c) Projection of Earth
(d) All the above

Answer 1

Ans:

Here the question is ellipsoid in terms of earth.

'Earth' is flattened at the poles and bulges at the equator, Geodacy represents the figure of the earth as Oblate Spheoride or oblate ellipsoid, If the ellipse formed by projection of earth will revolve about its minor axis then ellipsoid will generate. So Option A and C is right

An ellipsoid is a mathematical figure approximating the form of a earth, Used for reference in the calculations of Geodasy, Astronomy and Geosciences. So, Obviously Option B is Correct one

As per the above mentioned Statements Option 'D' valid as per Surveying criteria.