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DEM79

       SUBROUTINE  DEM79 (NIN,NOUT)
 C$    (DEM79 - Triangulated Surface Contour Plot)
 C$    Demonstration  of   contour   plotting  directly   from   a
 C$    triangulation  of   irregularly-distributed   data   points
 C$    without the generation of  an intermediate uniform grid  of
 C$    points, as implemented by routine CONTCP.
 C$
 C$    The fitting method  is a  slightly modified  version of  H.
 C$    Akima's ACM Algorithm 526 (routines FITVCM, FITVPD, FITVTA,
 C$    and  FITVXC),  and  corresponds  to  demonstration  program
 C$    TPDEM1 in Preusser's ACM Algorithm 626.
 C$
 C$    The surface contoured is the same one illustrated in DEM49,
 C$    DEM52, and  DEM54.   For  this  set  of  data  points,  the
 C$    triangulation  produced  by  Little's  algorithm   (routine
 C$    FITTFT) turns  out  to be  identical  to that  produced  by
 C$    Akima's  method,  so  there  is  no  point  in  a  separate
 C$    illustration of it.
 C$    (20-AUG-85)