1c_css2cd(3NCARG)                 NCAR GRAPHICS                c_css2cd(3NCARG)
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NAME

6       c_css2cd - convert from lat/lon coordinates to Cartesian coordinates.
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FUNCTION PROTOTYPE

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

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

17       n           The number of input lat/lon coordinates.
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19       rlat        An array containing the latitudes of the input coordinates,
20                   in degrees.
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22       rlon        An array containing the longitudes  of  the  input  coordi‐
23                   nates, in degrees.
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25       x           An  array containing the X component of the Cartesian coor‐
26                   dinates of the output data. (x[i],y[i],z[i]) is the  Carte‐
27                   sian  coordinate  corresponding  to  the lat/lon coordinate
28                   (rlat[i],rlon[i]) for i=0 to n-1.
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30       y           An array containing the Y component of the Cartesian  coor‐
31                   dinates  of the output data. (x[i],y[i],z[i]) is the Carte‐
32                   sian coordinate corresponding  to  the  lat/lon  coordinate
33                   (rlat[i],rlon[i]) for i=0 to n-1.
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35       z           An  array containing the Z component of the Cartesian coor‐
36                   dinates of the output data. (x[i],y[i],z[i]) is the  Carte‐
37                   sian  coordinate  corresponding  to  the lat/lon coordinate
38                   (rlat[i],rlon[i]) for i=0 to n-1.
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USAGE

41       c_css2cd is called to find the equivalent Cartesian  coordinates  on  a
42       unit sphere to specified latitude and longitude coordinates.  The coor‐
43       dinate of 0. latitude and 0. longitude is converted to Cartesian  coor‐
44       dinate  (1.,0.,0.).  Latitudes  and  longitudes  are  assumed  to be in
45       degrees.  c_css2cd is a double precision version of c_css2c.
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RETURN VALUE

48       c_css2cd does not return a value.
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ACCESS

51       To use c_css2cd, load the NCAR Graphics library ngmath.
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SEE ALSO

54       css_overview, c_cssgrid, c_csc2sd.
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56       Complete documentation for Cssgrid is available at URL
57       http://ngwww.ucar.edu/ngdoc/ng/ngmath/cssgrid/csshome.html
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60       Copyright (C) 2000
61       University Corporation for Atmospheric Research
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63       This documentation is free software; you  can  redistribute  it  and/or
64       modify  it  under  the  terms of the GNU General Public License as pub‐
65       lished by the  Free  Software  Foundation;  either  version  2  of  the
66       License, or (at your option) any later version.
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68       This  software  is  distributed in the hope that it will be useful, but
69       WITHOUT ANY  WARRANTY;  without  even  the  implied  warranty  of  MER‐
70       CHANTABILITY  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
71       Public License for more details.
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73       You should have received a copy of the GNU General Public License along
74       with  this  software;  if  not,  write to the Free Software Foundation,
75       Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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80UNIX                               MAY 2000                   c_css2cd(3NCARG)
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