Table 3 Candidate predictor variable. The ALS height distribution variables are supplemented with a prefix f or l, which means that the variable was computed from first or last echoes, respectively
Type | Variable | Abbreviation |
|---|---|---|
ALS-A | height percentiles | p05, p10, …, p90, p95 |
canopy density percentiles | b05, b10, …, b90, b95 | |
canopy cover | cov | |
mean height maximum height standard deviation of heights | avg max stdev | |
scanner type | Leica60, Leica80, Optech, Riegl | |
ALS-B | inventory area | Ähtäri, Heinävesi, Juva, Kemiö, Kuhmo, Kyrönmaa, Orimattila, Sodankylä, Suomussalmi |
Geographic | major region | other, Lapland |
latitude | ||
longitude | ||
elevation | ||
degree days | dd | |
slope | ||
NFI-A | site fertility class | site1, … site5 |
land use class | productive, low | |
soil type | mineral, peat | |
NFI-B | forest structure | natural, almost natural, managed |
mean diameter | meanD |