Table 1 Signature separability for unsupervised classification (Euclidean distance)

Class
names
Class
numbers
Polarizations
(Bands)*
Average
Separability
Minimum
Separability
Class pairs and separatibilities

Water 1       1 , 2 1 , 3 1 , 4 1 , 5 1 , 6 1 , 7 2, 3
Bare land 2       2 , 4 2 , 5 2 , 6 2 , 7 3 , 4 3 , 5 3 , 6
Wet land 3       3 , 7 4 , 5 4 , 6 4 , 7 5 , 6 5 , 7 6 , 7
Small structure 4  
Bush land 5 1 2 3 4 16 4 10 17 22 26 31 38 7
Forest 6       13 16 21 28 5 9 14
Urban area 7       21 4 8 16 4 12 8

*Using polarization: HH (1), HV (2), VH (3) and VV (4).