335 
o i 
> 
l l i ■ 
10 15 
-L. 1 
k i lometres 
Plate I. Preliminary terrain map of the Arrowsmith River Area, N.W.T., generated 
by automated multispectral analysis of ERTS-1 data. The broken line 
encloses the area of the ground data example (figure 6). The legend is 
as follows: dark green-high sediment water; black-(a) medium sediment 
water, unclassified-(b) unclassified land unit; dark blue-low sediment 
water; yellow-gravel; pink-till; red-marine silts; light blue-bedrock.