Level 2 Help for CONFILL

 input data set

 Either 1 or 2 output datasets may be specified.  The first dataset will
 contain the filled in image that has been generated from the contour image.
 The second (optional) dataset will contain a map of the distance (in pixels)
 to the nearest contour line used for filling that pixel in the first output.
 .VARIABLE SIZE
 image size (SL,SS,NL,NS)

 The first line of the input image to be output.

 The first pixel of each input line to be output.

 The number of lines to be output.

 The number of pixels to be output for each line.

 CONFILL expects all background pixels to be of a single DN value, specified
 by this parameter (Default value is 0).  All pixels with different values
 are assumed to be part of a contour line.

 Two interpolation modes are currently available in CONFILL: linear and cubic
 spline.  Extrapolation, when needed, is done by extension of the outermost
 contour. The valid keywords are: LINEAR, and SPLINE. SPLINE is the default.