|
| NKRD | PKRD | LKRD | MKRD | SKRD |
| Percentage of bare rock (%) | <10 | <30 | 30 - 50 | 50 - 70 | 70 - 90 |
| Characteristics of SPOT image | Bright green, patch, regular boundary, clear texture | Deep green, patch | Green, scattered across patches white | Shallow green, banded speckle white | Shallow green, banded patch white |
| Characteristics of ALOS image | Deep red, patch | Shallow red | Speckle shallow red, speckle grey | Linked patch with shallow grey | Grey white of linked patch |
| Characteristics of aerial photos | Speckled grey black(woodland), white, grey white, uniform texture, clear patch(cropland) | Grey, not very uniform texture | Grey, very nonuniform texture | Shallow grey, speckle grey black | Shallow white |