C C Declare an array to hold the data to be contoured. C C Declare the required real and integer workspaces. C C Declare an array to hold an area map. C C Declare the routine which will draw contour lines, avoiding labels.
C C Turn off the clipping indicator.
C C Turn on the drawing of the high and low label boxes. C thicken it somewhat. C C Generate an array of test data. C C Put special values in a roughly circular area. C C Compute viewport parameters.