Year | Feb 1987 | Feb 2002 | Jan 2015 | Jan 2017 | ||||
Indices | NDVI | BDI | NDVI | BDI | NDVI | BDI | NDVI | BDI |
R2 | 0.26 | 0.41 | 0.49 | 0.58 | 0.48 | 0.53 | 0.16 | 0.29 |