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Table 4 The SUR model for the plot volume based on the Spmax+95 strategy to stratify the dominant species1

From: On the potential to predetermine dominant tree species based on sparse-density airborne laser scanning data for improving subsequent predictions of species-specific timber volumes

Predictora

V total

V pine

V spruce

V deciduous

Intercept

−83.1778 ***

−72.1165 ***

−11.8327

−11.8591 *

Species

    

 P95

−17.0412 *

12.47493 *

−13.6919 **

−14.5252 ***

 S

21.61634 *

−89.1431 ***

99.7402 ***

7.486791 *

 D

−41.1525 **

−87.2537 ***

−0.87776

44.85359 ***

ALS

    

 Vegeratio

167.1603 ***

113.0326 ***

54.32393 ***

H 30

12.73679 ***

H 40

10.46561 ***

H 95

−0.1767

H mean

2.173142 ***

I mean, first

0.175805 .

  1. 1 Significant codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’
  2. aSpecies: pine with G ≥ 95 % (P 95), spruce (S) or deciduous trees (D). The I, D, and H refer to intensity, density, and height metrics; Vegeratio is the ratio of echoes above 2 m height to all echoes; and Prop_first is the proportion of first echoes to all echoes. The subscript indicates which descriptive statistic or percentile value was used and whether it was applied to a proportion of the echoes (sd  =  standard deviation, first  =  first-of-many echoes)