CONTOUR INTHIVAL 0.2 mm, 



0.1016 mm. - I foot 



AftEA COVEKED IS 2670 b/ 1770 FEET 



LEVELED CONTOUR ANALYSIS SET No.2 



SHADED AREAS BELOW SEA LEVEL 

 CLEAR AREAS ABOVE SEA LEVEL 



Fig. 11.4 



155 



