Table 2. Confusion matrix of two classification algorithms of Qingpu District, 2009.
New method | |||||||
Crops land | Forest land | Grass land | Water | residential and build-up land | |||
visual interpretationclassification | Crops land | 381111 | 1648 | 1247 | 22685 | 24942 | 431633 |
Forest land | 2696 | 22121 | 14 | 2592 | 2024 | 29447 | |
Grass land | 328 | 116 | 1751 | 73 | 77 | 2345 | |
Water | 8912 | 4947 | 308 | 98505 | 7182 | 119854 | |
residential andbuild-up land | 7883 | 4367 | 17 | 2484 | 141340 | 156091 | |
400930 | 33199 | 3337 | 126339 | 175565 | 739370 |
Kappa value ( = 0.79).