SKPar: Data: Taper Curve models fit using R-Package TapeR

In TapeS: Tree Taper Curves and Sorting Based on 'TapeR'

Data: Taper Curve models fit using R-Package TapeR

Description

Taper curve models based on a large data base of sectional measurements and fit by TapeR_FIT_LME.f.

Usage

SKPar

Format

A list with eight elements, each a TapeR taper curve model, fit using TapeR_FIT_LME.f. Additionally, these objects carry two attributes: spp and name, the first refering to the species code (cf. tprSpeciesCode) and the second to the abbreviated german species name. These eight models refer to the different tree species: Norway Spruce, Silver fir, Douglas fir, Scots pine, European larch, European Beech, Oak and Northern red oak. The spp-attributed is evaluated e.g. by the bark functions

Details

These taper curve models were developed for this package based on a collection of sectional measurements from several german forest research stations (FVA-BW, LFE, NW-FVA, TUM) and french ONF. Details for model fitting can be found in the corresponding report.

Data used to fit the models consists of

• Norway spruce: n=15181, n_D=156501

• European silver fir: n=7263, n_D=58988

• Douglas fir: n=12019, n_D=116349

• Scotch pine: n=11844, n_D=130379

• larch: n=2816, n_D=25490

• beech: n=16105, n_D=142691

• oak (robur/petraea): n=12341, n_D=97754

• Red oak: n=5411, n_D=43575

where n=number of trees and n_D=number of diameter measurements included.

Source

data collection of sectionally measured trees compiled by FVA-BW https://www.fva-bw.de

References

Vonderach und Kändler (2021): Neuentwicklung von Schaftkurvenmodellen für die Bundeswaldinventur auf Basis des TapeR-Pakets. Abschlussbericht zum Projekt BWI-TapeR im Auftrag des Thüneninstituts für Waldökosysteme.

Examples

data(SKPar)

TapeS documentation built on March 31, 2023, 7:19 p.m.