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.