Table 2 Performance of the GPR over the EC validation set per biome type. CODES according to IGBP land cover classification system34: CRO (crop), DBF (deciduous broadleaf forest), ENF (evergreen needleleaf forests), GRA (grassland), MF (mixed forest), OSH (open shrubland), SAV (savanna), WET (permanent wetland), WSA (woody savanna).
Biome | ME | RMSE | MAE | R 2 | No of samples | % of samples |
|---|---|---|---|---|---|---|
CRO | 0.01 | 0.11 | 0.06 | 0.80 | 118 | 13.5 |
DBF | –0.01 | 0.10 | 0.07 | 0.87 | 71 | 8.1 |
ENF | –0.01 | 0.07 | 0.05 | 0.93 | 38 | 4.3 |
GRA | –0.01 | 0.01 | 0.06 | 0.87 | 185 | 21.2 |
MF | 0.01 | 0.07 | 0.05 | 0.87 | 60 | 6.9 |
OSH | 0.01 | 0.12 | 0.06 | 0.82 | 133 | 15.2 |
SAV | 0.02 | 0.15 | 0.10 | 0.68 | 60 | 6.9 |
WET | 0.01 | 0.06 | 0.03 | 0.94 | 37 | 4.2 |
WSA | –0.01 | 0.08 | 0.05 | 0.87 | 172 | 19.7 |
ALL | 0.01 | 0.10 | 0.06 | 0.84 | 874 | 100 |
