From: Mapping forest age using National Forest Inventory, airborne laser scanning, and Sentinel-2 data
Age (years) | 95th percentile of ALS first return heights (m) [Field measured arithmetic mean height (m)] | SI (pSI) | Area (ha) | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
n | min | max | mean | sd | min | max | mean | sd | min | max | mean | min | max | mean | sum | |
NFI | ||||||||||||||||
Spruce | 2121 | 3 | 270 | 84 | 45 | 0.3 [3.8] | 32.2 [33.8] | 14.5 [15.3] | 5.3 [4.6] | 6 (8) | 26 (23) | 13 (15) | 0.025 | 0.025 | 0.025 | 53 |
Pine | 1779 | 4 | 287 | 106 | 43 | 0.2 [5.3] | 29.3 [28.1] | 13.8 [14.2] | 4.0 [3.6] | 6 (8) | 23 (23) | 10 (15) | 0.025 | 0.025 | 0.025 | 44 |
Birch | 929 | 3 | 223 | 79 | 33 | 1.0 [4.5] | 27.1 [26.3] | 12.5 [11.8] | 4.8 [4.0] | 6 (8) | 23 (23) | 11 (15) | 0.025 | 0.025 | 0.025 | 23 |
Validation | 63 | 11 | 89 | 53 | 17 | 6.5 | 21.3 | 13.1 | 3.4 | L | M | H | 0.8 | 10.2 | 2.7 | 170 |