Mapping Toolbox™

flat2ecc - Eccentricity of ellipse with given flattening

Syntax

eccentricity = flat2ecc(flattening)

Description

eccentricity = flat2ecc(flattening) returns the equivalent eccentricity for the input flattening. If the input, flattening, is a two-column vector, only the second column is used. This allows two-element vectors to be used as rows of the input, since the form [semimajor-axis, flattening] is a complete representation of an ellipsoid (but is not the standard form for ellipsoid vectors in the toolbox). In all other cases, all columns of the input are used.

Flattening and eccentricity are two methods of defining an ellipsoid.

Example

e = flat2ecc(0.003353)

e =
   0.08182149712026

This eccentricity is the default value for the Earth.

See Also

almanac, ecc2flat, ecc2n, majaxis

fipsname

flatearthpoly