nalog 
compared 
monitor 
imposed 
SCH & 
3 and 4). 
irst, 
t was 
y, to 
band 
al Fig. 3: Part of LANDSAT-1 scene E-1201-08022, 
Band 7, scale about 1:35o ooo. 
were 
as 
ith a 
S 
ficulty 
atures 
dr 
n is 
or 
rocks 
ral 
signa- 
  
“ 
+ 
pt. 
forma- 
the Fig. 4: Same area as above; supervised classification of spectral 
signatures, shown in 6 grey levels.