If greater than zero, the array holding the normalised change at each map pixel is smoothed using a box filter before estimating the mean or max value (as determined by parameter "maptol_mean" ). The box size is specified in arc-seconds. This will have little effect if " maptol_mean" is non-zero (i.e. if the mean map change is being used as the stopping criterion), but will tend to produce smoother convergence if " maptol_mean" is zero (i.e. if the maximum map change is being used as the stopping criterion). [0.0]

MAKEMAP, CALCQU