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+Image interpolation package. Contains interpolator routines specially
+designed to interpolate image data. This interpolator task is characterized
+by data arrays in which the data points are equally spaced. Data points
+and interpolation points are referenced simply by array index. Indefinite
+valued pixels may be present in the data. Since the interpolation routines
+will be applied to very large data arrays, efficiency is emphasized in these
+routines.