# spacepy.ctrans.geo_to_gdz

spacepy.ctrans.geo_to_gdz(geovec, units='km', geoid={'1mE2': 0.9933056200098587, 'A': 6378.137, 'A2': 40680631.59076899, 'A2mB2': 272331.60610755533, 'B': 6356.752314245179, 'B2': 40408299.98466144, 'E2': 0.0066943799901413165, 'E4': 4.481472345240445e-05, 'EP2': 0.0067394967422764514, 'Flat': 0.0033528106647474805, 'iFlat': 298.257223563})

  Convert geocentric geographic (cartesian GEO) to geodetic (spherical GDZ)

  Uses Heikkinen’s exact solution 1, see Zhu et al. [#Zhu] for details.

  Parameters
    geovec array-like

      Nx3 array (or array-like) of geocentric geographic [x, y, z] coordinates

  Returns
    out numpy.ndarray

      Nx3 array of geodetic altitude, latitude, and longitude

  Notes

  New in version 0.3.0.

  References

  1

    Heikkinen, M., “Geschlossene formeln zur berechnung raumlicher geodatischer koordinaten aus rechtwinkligen koordinaten”, Z. Vermess., vol. 107, pp. 207-211, 1982.

  2

    J. Zhu, “Conversion of Earth-centered Earth-fixed coordinates to geodetic coordinates,” in IEEE Transactions on Aerospace and Electronic Systems, vol. 30, no. 3, pp. 957-961, July 1994, doi: 10.1109/7.303772.