You can create an ellipsoid from scratch or modify an existing ellipsoid and save it as a new one. To modify a predefined ellipsoid, you must assign it a new code before you can save it. Give it a unique description, because only the description is displayed in the Coordinate System Library.
Specifies a description of the ellipsoid.
If you select Create An Ellipsoid, you must complete all four values. However once you enter Equatorial Radius and one other value, the remaining values are filled in automatically.
If you select Create A Sphere, you must enter a value for Equatorial Radius only.
Specifies the equatorial radius in meters. The equatorial radius is also called the semi-major axis.
Specifies the denominator of the flattening ratio. That is, if the flattening ratio is 1/x, specifies x.
Specifies the polar radius in meters. The polar radius is also called the semi-minor axis.
Specifies the eccentricity as a real number.