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Table 7 Differences between plot and stand-level estimates of the NFI and FMI models and direct estimates of an independent inventory. RMSD is root-mean-squared deviance and MD is mean deviance

From: Timber volume estimation based on airborne laser scanning — comparing the use of national forest inventory and forest management inventory data

Level

Model

n

RMSD (m3ha− 1)

RMSD%

MD (m3ha− 1)

MD%

R2

Plot

FMI model

60

65

24

− 34

− 13

0.59

Plot

NFI model

60

48

18

− 7

− 2

0.78

Plot

Adjusted NFI model

60

55

21

− 29

− 11

0.71

Stand

FMI model

6

40

15

− 34

− 13

0.72

Stand

NFI model

6

13

5

− 6

− 2

0.97

Stand

Adjusted NFI model

6

30

11

− 29

− 11

0.85