function [ x, y ] = ll_degrees_to_xy ( n, lat, lon )
%*****************************************************************************80
%
%% LL_DEGREES_TO_XY: Latitude/Longitude in degrees to XY coordinates.
%
% Discussion:
%
% Essentially, the latitude and longitude information is treated
% as though the Earth were a cylinder. As long as the the
% data is relatively close on the sphere (and far from either
% pole) the distortion will not be too severe. If the data
% is closely clustered, and also near the equator, the
% positions will be relatively accurate.
%
% Licensing:
%
% This code is distributed under the GNU LGPL license.
%
% Modified:
%
% 19 May 2016
%
% Author:
%
% John Burkardt
%
% Input:
%
% integer N, the number of data items.
%
% real LAT(N), LON(N), the latitude and longitude, in degrees.
%
% Output:
%
% real X(N), Y(N), the point coordinates, in miles.
%
radius = 3958.89;
x = zeros ( n, 1 );
y = zeros ( n, 1 );
for i = 1 : n
theta = degrees_to_radians ( lon[i] );
phi = degrees_to_radians ( lat[i] );
x[i] = radius * theta;
y[i] = radius * phi;
end
return
end