223 
.nated by 
Color 
theme 
TM1 
TM2 
TM3 
TM4 
TM5 
TM7 
: TM scene 
Blue-purple 
Vegetation 
( 1 ) 
09 
08 
06 
30 
12 
07 
ountainous 
he Sahara. 
Red 
Suitable for 
cultivation area 
(2) 
10 
10 
11 
16 
20 
18 
cones of 
is well as 
Claret 
•• 
(3) 
10 
10 
12 
17 
21 
18 
tion which 
1 pastoral 
Green 
Bare soil 
(4) 
14 
19 
23 
33 
38 
36 
d submited 
ind eolian 
Pale green 
Bushy dunes 
(5) 
14 
19 
24 
35 
39 
37 
nan, also, 
Dark green 
Uet zones 
(6) 
12 
15 
17 
25 
31 
30 
zing, ill 
Grey 
River bed 
(7) 
13 
16 
20 
28 
31 
29 
Pale blue 
prominent rock 
(8) 
14 
18 
23 
35 
41 
36 
Whi te 
Sand 
(9) 
17 
28 
38 
52 
68 
62 
listing in 
lection of 
Pale brown 
Clayey soil 
( 10) 
13 
17 
21 
32 
37 
34 
composite 
averaged. 
Brown 
Wet zones 
(11) 
13 
15 
17 
24 
31 
29 
a better 
Is TM4,TM5 
Dark brown 
Wet zones 
(12) 
12 
13 
16 
24 
29 
25 
Black 
Urban+Vegetation 
(13) 
09 
09 
09 
19 
15 
11 
figure 1 
selected 
shades. 
R (%) 
SPECTRAL SIGNATURES OF POINTS LOCALISED ON DIFFERENT THEMES 
DISTINGUISHED IN THE COLOR COMPOSITE IMAGE 
~ 2,3 
I ! I— 
TM 1 T M 2 T M 3