Mapping Toolbox

axes2ecc

Calculate eccentricity from semimajor and semiminor axes

Syntax

• eccentricity = axes2ecc(semimajor,semiminor)
  eccentricity = axes2ecc(axes)
  

Description

Eccentricity, the second element of the standard geoid vector in the Mapping Toolbox, can be determined given both the semimajor and semiminor axes.

eccentricity = axes2ecc(semimajor,semiminor) returns the eccentricity associated with the input axes.

eccentricity = axes2ecc(axes) allows the axes inputs to be packed into a single, two-column input of the form [semimajor, semiminor].

Examples

Using the axes for the default GRS 80 Earth model:

• ecc = axes2ecc(6378.1370,6356.7523)
  ecc =
     0.08181921804834
  

This is the eccentricity returned by almanac('earth','geoid').

See Also

almanac	Planetary data
ecc2n majaxis minaxis	Related conversion functions

aut2geod

axesm