function OK = xyz2ell_test
% XYZ2ELL_TEST  Test routine for xyz2ell
%  
% More detailed description of the test goes here.
%
%
%   See also XYZ2ELL

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%       Arjan Mol
%
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%% Version <http://svnbook.red-bean.com/en/1.5/svn.advanced.props.special.keywords.html>
% Created: 29 Oct 2010
% Created with Matlab version: 7.9.0.529 (R2009b)

% $Id$
% $Date$
% $Author$
% $Revision$
% $HeadURL$
% $Keywords: $

MTestCategory.Unit;

OK = 0;

a  = 6378137;
e2 = 0.006694381;
x0 = 5000000;
y0 = 3000000;
z0 = 2000000;

x  = x0;
y  = y0;
z  = z0;
numIters = 1000;
d = nan(1,numIters);

% convert back and forth several times
for ii = 1:numIters
    [lat,lon,h] = xyz2ell(x,y,z,    a,e2);
    [x,y,z]     = ell2xyz(lat,lon,h,a,e2);
    d(ii)       = (x-x0).^2+(y-y0).^2+(z-z0).^2;
end

% plot d to see error developement trhoughout iterations
% plot(d)

OK = d(numIters)<1e-5;