| Image sources | Years | Kappa coefficients | Overall accuracy |
| Landsat | 1990 | 0.82 | 86.7% |
| Landsat | 2000 | 0.89 | 91.3% |
| Landsat | 2010 | 0.82 | 86.1% |
| Landsat | 2020 | 0.73 | 78% |