Table 3 Prediction accuracy (equivalent to RMSE) of 300 Index and Site Index for a range of spatial scales
From: Characterising prediction error as a function of scale in spatial surfaces of tree productivity
Scale | Length (km) | Area (ha) | Accuracy | |
|---|---|---|---|---|
300 Index | Site Index | |||
(m3 ha−1 year−1) | (m) | |||
Plot | 0.02 | 0.04 | 3.29 | 2.02 |
Stand | 0.7 | 25–50 | 2.00 | 1.58 |
Small forest | 2 | 200–400 | 1.84 | 1.54 |
Medium forest | 7 | 2500–5000 | 1.19 | 1.34 |
Large forest | 20 | 20,000–40,000 | 0.72 | 0.89 |
Region | 200 | 2–4 m | 0.10 | 0.19 |