From: Inventory of aspen trees in spruce dominated stands in conservation area
Stand | Sampling rate (%) | Sampling alternative | Number of plots | RMSE (%) (bias %) | |||
---|---|---|---|---|---|---|---|
V | N | D g M | N dbh >25cm | ||||
1 | 2.48 | Random | 5 | 62.0 (–3.4) | 64.3 (–5.0) | 56.9 (–10.6) | 81.8 (–2.4) |
4.97 | Random | 10 | 43.8 (–3.3) | 45.6 (–2.9) | 35.2 (–6.0) | 58.2 (–3.5) | |
7.45 | Random | 15 | 35.2 (0.6) | 36.2 (0.2) | 23.5 (–3.6) | 47.7 (–0.5) | |
9.94 | Random | 20 | 30.5 (–1.4) | 31.0 (–1.2) | 15.5 (–2.1)) | 41.8 (–2.1) | |
Systematic | 5 | 50.8 (–3.0) | 56.0 (–4.4) | 48.2 (–6.8) | 74.3 (–1.2) | ||
Systematic | 10 | 34.5 (–0.1) | 40.1 (–1.4) | 35.8 (–6.1) | 48.5 (0.1) | ||
Systematic | 15 | 25.9 (–2.3) | 21.5 (–1.5) | 17.8 (–1.8) | 49.7 (–4.2) | ||
Systematic | 20 | 24.5 (–1.8) | 25.5 (–1.2) | 13.5 (–2.5) | 38.5 (–2.8) | ||
2 | 3.36 | Random | 5 | 85.7 (–0.2) | 83.8 (0) | 29.4 (1.3) | 87.1 (–0.8) |
6.72 | Random | 10 | 59.8 (1.2) | 59.7 (0.6) | 24.5 (–1.4) | 60.6 (0.2) | |
10.08 | Random | 15 | 50.0 (–0.2) | 49.2 (0) | 21.1 (–1.3) | 50.1 (–0.2) | |
13.45 | Random | 20 | 41.8 (0.7) | 42.7 (–0.6) | 18.7 (–0.4) | 42.8 (–0.1) | |
Systematic | 5 | 84.4 (–3.8) | 98.2 (–8.2) | 28.6 (0.9) | 91.9 (–5.9) | ||
Systematic | 10 | 53.2 (0) | 47.6 (–2.4) | 23.6 (–0.6) | 52.2 (–1.4) | ||
Systematic | 15 | 37.6 (1.4) | 38.3 (–0.5) | 18.5 (–0.3) | 42.2 (0.5) | ||
Systematic | 20 | 30.6 (0.1) | 31.1 (–0.6) | 16.9 (–0.2) | 34.6 (–0.3) | ||
3 | 1.55 | Random | 5 | 51.1 (0.2) | 64.5 (–0.5) | 21.0 (0.5) | 52.8 (–0.1) |
3.09 | Random | 10 | 36.0 (–0.2) | 46.3 (–1.8) | 13.1 (0.5) | 37.7 (–0.7) | |
4.64 | Random | 15 | 29.0 (–0.5) | 37.3 (–1.0) | 10.1 (–0.1) | 30.1 (–0.5) | |
6.18 | Random | 20 | 25.2 (0.1) | 31.7 (–0.8) | 8.5 (0.1) | 25.6 (0.2) | |
Systematic | 5 | 53.6 (–1.2) | 58.4 (2.9) | 18.5 (0.5) | 52.9 (–0.5) | ||
Systematic | 10 | 33.6 (–0.4) | 35.5 (–0.7) | 12.8 (–1.6) | 36.4 (–0.6) | ||
Systematic | 15 | 26.7 (0) | 29.8 (–0.7) | 7.7 (–0.2) | 24.2 (0) | ||
Systematic | 20 | 33.8 (0.1) | 35.7 (0.4) | 7.2 (–0.5) | 31.9 (–0.2) |