Mapping Toolbox

flat2ecc

Convert from flattening to eccentricity representation of the ellipsoid

Syntax

• eccentricity = flat2ecc(flattening)
  

Description

Flattening and eccentricity are two methods of defining an ellipsoid.

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 geoid vectors in the Mapping Toolbox). In all other cases, all columns of the input are used.

Example

• e = flat2ecc(0.003353)
  e =
     0.08182149712026
  

This eccentricity is the default value for the Earth.

See Also

almanac	Planetary data
ecc2flat	Convert from eccentricity to flattening
ecc2n majaxis	Other ellipsoid functions

findm

flatearthpoly