Mapping Agricultural Frozen Soil on the Watershed Scale Using Remote Sensing Data
Table 6
Classification results of six selected RADARSAT-1 SAR images compared with soil temperature at the 12 training/validation study fields, by acquisition date.
Classification results
Frozen
Unfrozen
Total
Success (%)
Omission (%)
January 8, 2006
Ground observations
Frozen
11
1
12
92
8
Unfrozen
0
0
0
100
0
Total
11
1
12
92
8
Commission (%)
0
100
8
Kappa = NA(a)
February 1, 2006
Ground observations
Frozen
7
1
8
88
12
Unfrozen
1
3
4
75
25
Total
8
4
12
83
17
Commission (%)
13
25
17%
Kappa = 0.63
February 26, 2006
Ground observations
Frozen
11
1
12
92
8
Unfrozen
0
0
0
100
0
Total
11
1
12
92
8
Commission (%)
0
100
8
Kappa = NA(a)
March 21, 2006
Ground observations
Frozen
4
2
6
67
33
Unfrozen
1
5
6
83
17
Total
5
7
12
75
25
Commission (%)
20
29
25
Kappa = 0.50
April 14, 2006
Ground observations
Frozen
0
0
0
100
0
Unfrozen
0
12
12
100
0
Total
0
12
12
100
0
Commission (%)
0
0
0
Kappa = NA(a)
May 8, 2006
Ground observations
Frozen
0
0
0
100
0
Unfrozen
0
12
12
100
0
Total
0
12
12
100
0
Commission (%)
0
0
0
Kappa = NA(a)
(a)Because only one class is represented, the Kappa coefficient cannot be calculated (division by zero).
