The area inside the projected C circle is characterized as area 1 and the area outside the circle as C area 2. The edges will go in edge group 1. C C Add to the second area map the contour lines for the area near C Boulder. They will go in edge group 3. C C Scan the second area map to color the contour bands near Boulder.
C print it.
C C Done. C C Find the area identifier relative to edge group 1. If the polyline is outside the circle, draw it. IF C C Done. C C Find the area identifier relative to edge group 1.