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c_css2cd(3NCARG) NCAR GRAPHICS c_css2cd(3NCARG)

NAME

c_css2cd - convert from lat/lon coordinates to Cartesian coordinates.

FUNCTION PROTOTYPE

    void   c_css2cd(int, double *, double *, double *, double *, double *);

SYNOPSIS

    c_css2cd(n, rlat, rlon, x, y, z);

DESCRIPTION

n
The number of input lat/lon coordinates.
rlat
An array containing the latitudes of the input coordinates, in degrees.
rlon
An array containing the longitudes of the input coordinates, in degrees.
x
An array containing the X component of the Cartesian coordinates of the output data. (x[i],y[i],z[i]) is the Cartesian coordinate corresponding to the lat/lon coordinate (rlat[i],rlon[i]) for i=0 to n-1.
y
An array containing the Y component of the Cartesian coordinates of the output data. (x[i],y[i],z[i]) is the Cartesian coordinate corresponding to the lat/lon coordinate (rlat[i],rlon[i]) for i=0 to n-1.
z
An array containing the Z component of the Cartesian coordinates of the output data. (x[i],y[i],z[i]) is the Cartesian coordinate corresponding to the lat/lon coordinate (rlat[i],rlon[i]) for i=0 to n-1.

USAGE

c_css2cd is called to find the equivalent Cartesian coordinates on a unit sphere to specified latitude and longitude coordinates. The coordinate of 0. latitude and 0. longitude is converted to Cartesian coordinate (1.,0.,0.). Latitudes and longitudes are assumed to be in degrees. c_css2cd is a double precision version of c_css2c.

RETURN VALUE

c_css2cd does not return a value.

ACCESS

To use c_css2cd, load the NCAR Graphics library ngmath.

SEE ALSO

css_overview, c_cssgrid, c_csc2sd.

Complete documentation for Cssgrid is available at URL
http://ngwww.ucar.edu/ngdoc/ng/ngmath/cssgrid/csshome.html

COPYRIGHT

Copyright (C) 2000
University Corporation for Atmospheric Research

The use of this Software is governed by a License Agreement.

MAY 2000 UNIX