This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.
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As of Version 7.0, has become a property of GeodesyData.

is an option for SpheroidalDistance which specifies the length of the semimajor axis in the spheroidal model.
  • SemimajorAxis->length specifies that the length of the semimajor axis of the spheroid is length kilometers.
  • The default setting, representing Earth, is 6378.14, from the WGS-84 standard.