Provided by: libncarg-dev_6.4.0-9_amd64 bug

NAME
       CSSTRID - calculates a Delaunay triangulation for data on a sphere


SYNOPSIS
       CALL CSSTRID (N, RLAT, RLON, NT, NTRI, IWK, RWK, IER)


DESCRIPTION
       N           (integer,input) The number of input data points (N > 2).

       RLAT        (double precision, input) An array containing the latitudes of the input data,
                   expressed in degrees.  The first three points must not be collinear (lie on  a
                   common great circle).

       RLON        (double  precision,  input)  An  array  containing the longitudes of the input
                   data, expressed in degrees.

       NT          (integer, output) The number of triangles in  the  triangulation,  unless  IER
                   .NE. 0, in which case NT = 0. Where NB is the number of boundary points on the
                   convex hull of the data, if NB .GE. 3, then NT = 2N-NB-2,  otherwise  NT=2N-4.
                   The input data are considered to be bounded if they all lie in one hemisphere.
                   Dimensioning NT for 2*N will always work.

       NTRI        (integer, output) A two-dimensional integer array dimensioned for 3 x NT where
                   NT  is  the number of triangles in the triangulation (NT is at most 2*N). NTRI
                   contains the triangulation  data.  The  vertices  of  the  Kth  triangle  are:
                   (PLAT(NTRI((1,K)),PLON(NTRI(1,K)),          (PLAT(NTRI((2,K)),PLON(NTRI(2,K)),
                   (PLAT(NTRI((3,K)),PLON(NTRI(3,K))

       IWK         (integer, input) An integer workspace of length 27*N.

       RWK         (double precision, input) A work array dimensioned for 13*N.  Note  that  this
                   work array must be typed DOUBLE PRECISION.

       IER         (integer,  output)  An  error  return value.  If IER is returned as 0, then no
                   errors were detected. If IER is non-zero, then  refer  to  the  man  page  for
                   cssgrid_errors for details.


USAGE
       CSSTRID  is  called  to  find  a Delaunay triangulation of data randomly positioned on the
       surface of a sphere. CSSTRID is a double precision version of CSSTRI.


ACCESS
       To use CSSTRID, load the NCAR Graphics library ngmath.


SEE ALSO
       css_overview, cssgrid, csstri, csvoro.

       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.