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HIDSV

       SUBROUTINE  HIDSV (FU, MP,MT, NP,NT, S, T, PR2, PL2)
 C$    (Spherical View)
 C$    Produce a perspective drawing  of a single-valued  function
 C$    defined over a spherical surface, so as to exhibit the arcs
 C$    of latitude and longitude.  The arguments are:
 C$
 C$    (MP,MT)........Actual declared dimensions of FU(*,*)
 C$    FU(NP,NT)......Array of function values
 C$    NP.............Number (=2*N) of points on one latitude
 C$    S..............S=1, graph FU positive. S=-1, graph FU
 C$                   negative
 C$    NT.............Number of points on one longitude
 C$    T(3,3).........Orthogonal rotation matrix
 C$    PR2............2-D projection subroutine, usually VISSP.
 C$    PL2............2-D pen movement subroutine, usually PL2PO.
 C$
 C$    (04-FEB-82)