| 
Hoe 
ff ay, weet a8 ‘t 
SEA eV avai 
FicurE 6. Line-scan imagery obtained by an optical mechanical scanner. The five spectral bands shown here were 
among 18 bands which can be recorded simultaneously. A is an ultraviolet image (0.32—0.38 micron); B is a visi- 
ble-red image (0.62-0.68 micron); C is a near-infrared image (0.80-1.0 micron); D is also a near-infrared image 
(1.5-1.8 micron); and E is a thermal infrared image (8.0-14.0 micron). Notice the different tones of features in 
the different parts of the electromagnetic spectrum. Notice also that certain range features are seen more readily 
in one band than in another. The visible band shows the most vegetation-soil boundaries. The near-infrared band 
(0.8-1.0 micron) shows dense meadow vegetation most clearly. The other near-infrared band (1.5-1.8 micron) em- 
phasizes standing water, and the thermal infrared band shows temperature differences due to moisture effects, 
vegetation density, and soil surface characteristics. 
176 
