Table 5.
Linear models for predicting MHI value based on remote sensing vegetation indices, regression coefficient Adjusted R2 significance (F) and Accuracy-Test Value (RMSE).
| Vegetation indices (X) | Formula: MHI (Y) = | R2-adjusted | F | RMSE |
|---|---|---|---|---|
| NDVI | 84.81*NDVI + 16.709 | 0.631 | 30.068*** | 7.31 |
| MI | −3.488*MI + 97.967 | 0.480 | 16.705** | 10.25 |
| MVI | 28.367*MVI + 75.135 | 0.711 | 42.897*** | 6.46 |
| SAVI | 103.912*SAVI + 31.845 | 0.563 | 22.902*** | 7.95 |
| NBR | 209.780*NBR-79.158 | 0.481 | 16.749** | 12.49 |
| GCI | 2.677*GCI + 45.22 | 0.384 | 11.577** | 9.44 |
| EVI | 7.85*EVI + 41.965 | 0.389 | 11.803** | 9.41 |
| SIPI | −243.007*SIPI + 322.104 | 0.389 | 11.825** | 9.40 |
| ARVI | 65.831*ARVI + 25.264 | 0.665 | 34.810*** | 6.96 |
| NBR, GCI, SIPI, ARVI | 102.12*NBR – 4.64*GCI + 178.15*SIPI + 159.53*ARVI - 252.39 | 0.831 | 21.8987*** | 4.46 |
Notes: NDVI = Normalised Difference Vegetation Index; MI = Mangrove Index; MVI = Mangrove Vegetation Index; SAVI = Soil Adjusted Vegetation Index; NBR = Normalised Burn Ratio; GCI = Green Chlorophyll Index; EVI = Enhanced Vegetation Index; SIPI = Structure Insensitive Pigment Index; ARVI = Atmospherically Resistant Vegetation Index