nsur2

evaluation of the component biomass functions fit by nonlinear seemingly
unrelated regression (NSUR) to estimate absolute or relative component mass

Providing new german-wide 'TapeR' Models and functions for their
evaluation. Included are the most common tree species in Germany (Norway
spruce, Scots pine, European larch, Douglas fir, Silver fir as well as
European beech, Common/Sessile oak and Red oak). Many other species are mapped
to them so that 36 tree species / groups can be processed. Single trees are
defined by species code, one or multiple diameters in arbitrary measuring
height and tree height. The functions then provide information on diameters
along the stem, bark thickness, height of diameters, volume of the total or
parts of the trunk and total and component above-ground biomass. It is also
possible to calculate assortments from the taper curves. Uncertainty
information is provided for diameter, volume and component biomass estimation.

Christian Vonderach

TapeS

Tree Taper Curves and Sorting Based on 'TapeR'

Edgar Kublin

Gerald Kändler

nsur2 function

<dl><dt>spp</dt>
<dd>vector of species code for biomass component function of interval
[1;8]; see <code>BaMap</code> for mapping of species model codes</dd>
<dt>dbh</dt>
<dd>vector of diameter in breast height; in centimeter</dd>
<dt>ht</dt>
<dd>vector of tree heights, in meter</dd></dl>

Arguments

Component biomass functions — nsur2

<dl>

<dt>spp</dt>
<dd>vector of species code for biomass component function of interval
[1;8]; see <code>BaMap</code> for mapping of species model codes</dd>


<dt>dbh</dt>
<dd>vector of diameter in breast height; in centimeter</dd>


<dt>ht</dt>
<dd>vector of tree heights, in meter</dd>

</dl>

nsur2: Component biomass functions

Description

Usage

Value

Arguments

Details

References

Examples