tanbul 2004 International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B7. Istanbul 2004 
—— 
,eDrew, 
Id value 
the aim 
eck the 
weshold 
nite and 
1:74.54. 
weshold 
lated as 
14; 37, 
value. 
: alunite 
uld not 
cted 19 
only 3 
detected 
ethod 8 
and 11 
orrectly 
." These 
images 
1 of the 
ontrary, 
'erior to 
  
  
  
  
  
  
  
  
  
  
  
weshold 
mean + 
les are 
unerals, 
in BR 
ite and 
| to. 
Figure 4. Alunite and kaolinite mineral indices by using band ratioing and SI method. (a) Band ratio results for alunite 
mineral, (b) Band ratio results for kaolinite mineral, (c) SI method for alunite minerals, and (d) SI method for kaolinite 
minerals. 
les . are 
elite Table 3. Checked samples and 32-bit DN value of the samples on the resultant imageries 
is ban 
sion of SI BR 
r study, Sample no. Alunite Kaolinite Alunite Kaolinite 
band 4 I 4.990 3.665 1.425 0.757 
atio for 2 6.418 4.059 1.273 0.859 
16. 3 3.495 4.954 1.1250 0.780 
4 9.434 6.265 1.295 0.900 
indices 5 4.797 1.592 1.357 0.907 
"ion of 6 2.949 4.245 1.200 0.841 
sful for 7 6.540 3.696 1.250 0.805 
; ; 8 4.742 2.533 1.380 0.783 
ed in 9 5.050 2.962 1.463 0.753 
the SI (Oueier 4677 4.669 1.311 0.782 
ite and il 9.687 3.640 1.369 0.911 
Y., and 12 2317 2.618 1.396 0.894 
ried out 13 3.405 2.418 1.347 0.879 
erefore, 14 2.022 4.252 1.277 0.712 
n-desert 15 7.827 3.033 1.276 0.908 
16 4.991 1.597 1.339 0.889 
17 2.159 2.888 1.194 0.724 
18 3.600 2.517 1.300 0.827 
19 7.600 1.950 1.262 0.928 
Total match no. out of 19 13 3 8 11 
Mean value of image data 4.034 4.54 1.304 0.819 
  
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