| Land use type | Year | ||||
| 1996 | 2001 | 2005 | 2010 | 2014 | |
| Cultivated land | 0.73 | 0.88 | 0.89 | 0.91 | 0.81 |
| Non-cultivated land | 0.88 | 0.93 | 0.74 | 0.85 | 0.88 |
| Others | 0.80 | 0.89 | 0.83 | 0.87 | 0.86 |
| Average Kappa coefficient | 0.80 | 0.86 | 0.86 | 0.85 | 0.88 |