W3FT01

The W3FT01 routine interpolates values in a data field
           for a given grid coordinate in a data array, estimates
           a data value for that point using either a linear
           or quadratic interpolation method.

USAGE:  CALL W3FT01 (STI, STJ, FLD, HI, II, JJ, NCYCLK, LIN)

   Input argument list:
      STI       REAL*4 I GRID COORDINATE OF THE POINT FOR WHICH
                       AN INTERPOLATED VALUE IS DESIRED
      STJ       REAL*4 J GRID COORDINATE OF THE POINT FOR WHICH
                       AN INTERPOLATED VALUE IS DESIRED
      FLD       REAL*4 SIZE(II,JJ) DATA FIELD
      II        INTEGER*4 NUMBER OF COLUMNS IN 'FLD'
      JJ        INTEGER*4 NUMBER OF ROWS IN 'FLD'
      NCYCLK    INTEGER*4 CODE TO SPECIFY IF GRID IS CYCLIC OR
                       NOT:
                        = 0 NON-CYCLIC IN II, NON-CYCLIC IN JJ
                        = 1 CYCLIC IN II, NON-CYCLIC IN JJ
                        = 2 CYCLIC IN JJ, NON-CYCLIC IN II
                        = 3 CYCLIC IN II, CYCLIC IN JJ
      LIN       INTEGER*4 CODE SPECIFYING INTERPOLATION METHOD:
                        = 1 LINEAR INTERPOLATION
                       .NE.1  QUADRATIC INTERPOLATION

   Output argument list:
      HI        REAL*4 DATA FIELD VALUE AT (STI,STJ) OBTAINED
                       BY INTERPOLATION.

 
W3lib.tar Library contains Fortran 90 decoder/encoder routines for GRIB edition 1. (Fortran90)
Date posted: 2/22/2007