Geodetic Datum - Defining and Derived Parameters

Defining and Derived Parameters

Parameter Symbol
Semi-major axis a
Reciprocal of flattening 1/f

From a and f it is possible to derive the semi-minor axis b, first eccentricity e and second eccentricity e′ of the ellipsoid

Parameter Value
semi-minor axis b = a(1 − f)
First eccentricity squared e2 = 1 − b2/a2 = 2ff2
Second eccentricity squared e′2 = a2/b2 − 1 = f(2 − f)/(1 − f)2

Read more about this topic:  Geodetic Datum

Famous quotes containing the words defining, derived and/or parameters:

    The industrial world would be a more peaceful place if workers were called in as collaborators in the process of establishing standards and defining shop practices, matters which surely affect their interests and well-being fully as much as they affect those of employers and consumers.
    Mary Barnett Gilson (1877–?)

    All moral discipline, all moral perfection derived from the soul of literature.
    Thomas Mann (1875–1955)

    Men have defined the parameters of every subject. All feminist arguments, however radical in intent or consequence, are with or against assertions or premises implicit in the male system, which is made credible or authentic by the power of men to name.
    Andrea Dworkin (b. 1946)