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      PWL_INTERP_2D_SCATTERED - Piecewise Linear Interpolant to 2D Scattered Data
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      PWL_INTERP_2D_SCATTERED <br> Piecewise Linear Interpolant to 2D Scattered Data
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      <b>PWL_INTERP_2D_SCATTERED</b>
      is a FORTRAN77 library which
      produces a piecewise linear interpolant to 2D scattered data,
      that is, data th