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

6       CSSGRID - tension spline interpolation on a sphere.
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SYNOPSIS

9       CALL CSSGRID (N, RLAT, RLON, F, NI, NJ, PLAT, PLON, FF, IWK, RWK, IER)
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DESCRIPTION

12       N           (integer,input) The number of input data points (N > 2).
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14       RLAT        (real,  input)  An  array  containing  the latitudes of the
15                   input data, expressed in degrees.  The first  three  points
16                   must not be collinear (lie on a common great circle).
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18       RLON        (real,  input)  An  array  containing the longitudes of the
19                   input data, expressed in degrees.
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21       F           (real, input) An array containing data values.  F(I)  is  a
22                   functional value at (RLAT(I),RLON(I)) for I = 1 to N.
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24       NI          (integer,  input)  The number of rows in the uniform output
25                   grid. NI can be 1.
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27       NJ          (integer, input) The number of columns in the uniform  out‐
28                   put grid. NJ can be 1.
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30       PLAT        (real,  intput)  An array of length NI containing the lati‐
31                   tudes the output grid lines.  The values in PLAT should  be
32                   in degrees.
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34       PLON        (real,  intput) An array of length NJ containing the longi‐
35                   tudes the output grid lines.  The value in PLON  should  be
36                   in degrees.
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38       FF          (real,  output)  An  NI  by NJ array containing the desired
39                   interpolated values. FF(I,J) is the interpolated  value  at
40                   the  coordinate  specified by PLAT(I) and PLON(J) for I = 1
41                   to NI and J = 1 to NJ.
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43       IWK         (integer, input) An integer workspace of length 27*N.
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45       RWK         (double precision, input)  A  work  array  dimensioned  for
46                   13*N.  Note that RWK must be typed DOUBLE PRECISION.
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48       IER         (integer,  output)  An  error  return  value.   If  IER  is
49                   returned as 0, then no errors were detected. If IER is non-
50                   zero,  then  refer  to  the man page for cssgrid_errors for
51                   details.
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USAGE

54       CSSGRID is called to find an interpolating tension spline for data ran‐
55       domly positioned on a sphere.
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ACCESS

58       To use CSSGRID, load the NCAR Graphics library ngmath.
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SEE ALSO

61       css_overview, csstri, cssgrid_errors
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63       Complete documentation for Cssgrid is available at URL
64       http://ngwww.ucar.edu/ngdoc/ng/ngmath/cssgrid/csshome.html
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67       Copyright (C) 2000
68       University Corporation for Atmospheric Research
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70       This  documentation  is  free  software; you can redistribute it and/or
71       modify it under the terms of the GNU General  Public  License  as  pub‐
72       lished  by  the  Free  Software  Foundation;  either  version  2 of the
73       License, or (at your option) any later version.
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75       This software is distributed in the hope that it will  be  useful,  but
76       WITHOUT  ANY  WARRANTY;  without  even  the  implied  warranty  of MER‐
77       CHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU  General
78       Public License for more details.
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80       You should have received a copy of the GNU General Public License along
81       with this software; if not, write  to  the  Free  Software  Foundation,
82       Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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87UNIX                               May 2000                    CSSGRID(3NCARG)
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