Year | Actual sampling points | Classification error point | Accuracy |
1990 | 100 | 10 | 90 |
1995 | 100 | 12 | 88 |
2000 | 100 | 8 | 92 |
2005 | 100 | 11 | 89 |
2010 | 100 | 8 | 92 |
2015 | 100 | 7 | 93 |