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ELLIPSOID

ELLIPSOID

Name


      ELLIPSOID

Purpose


      Set or get earth ellipsoid structure.

Category


Calling Sequence


      ellipsoid

Inputs


Keyword Parameters


Keywords


        SET=ell_name Name of ellipsoid to set as working.
          Default = WGS 84.
        GET=ell_str Return ellipsoid structure.
        /ALL List all available ellipsoids.
        /CURRENT List currently set ellipsoid.
        IDL=idl_ell Set an IDL ellipsoid as the working one.
          idl_ell = [a, e2, k0] where a=semi-major axis in m,
            e2 = ecc^2, k0=scale on central meridian.

Outputs


Common Blocks


      ellipsoid_com

Notes


      Note: the ellipsoid structure contains the semimajor
        axis in meters, the reciprocal of the flattening
        factor, and the ellipsoid name.
        This routine is used internally by the ellipsoid
        ell_* routines. The working ellipsoid may be set
        before calling those routines.

Modification History


      R. Sterner, 2002 May 01
      R. Sterner, 2003 Oct 17 --- New keyword IDL=ell to set map_set ellipsd.
      R. Sterner, 2004 Jan 13 --- Added semiminor axis, b, to /CURR listing.
      R. Sterner, 2010 May 04 --- Converted arrays from () to [].
  Copyright (C) 2002, Johns Hopkins University/Applied Physics Laboratory
  This software may be used, copied, or redistributed as long as it is not
  sold and this copyright notice is reproduced on each copy made. This
  routine is provided as is without any express or implied warranties
  whatsoever. Other limitations apply as described in the file disclaimer.txt.



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