HT.par

<p>
  Height is only measured on a subset of the trees on a sample
  plots. This Height tariff is used to estimate the height of the trees
  with only a dbh measurement.</p>

datasets

Implementation of functions for fitting taper curves (a semiparametric
linear mixed effects taper model) to diameter measurements along stems. Further
functions are provided to estimate the uncertainty around the predicted curves,
to calculate timber volume (also by sections) and marginal (e.g., upper) diameters.
For cases where tree heights are not measured, methods for estimating
additional variance in volume predictions resulting from uncertainties in
tree height models (tariffs) are provided.  The example data include the taper
curve parameters for Norway spruce used in the 3rd German NFI fitted to 380 trees
and a subset of section-wise diameter measurements of these trees. The functions
implemented here are detailed in Kublin, E., Breidenbach, J., Kaendler, G. (2013)
<doi:10.1007/s10342-013-0715-0>.

Christian Vonderach

TapeR

Flexible Tree Taper Curves Based on Semiparametric Mixed Models

Edgar Kublin

Johannes Breidenbach

HT.par function

<p>The format is:
List of 4
 $ knt.mw: num [1:16] 0 0 0 0 19.6 ...
 $ coe.mw: num [1:12] 1.3 7.28 15.1 21.75 24.39 ...
 $ knt.sd: num [1:53] 0 0 0 0 7.52 ...
 $ coe.sd: num [1:49] 0 0.618 1.376 2.142 2.486 ...</p>

HT.par: Height tariff parameters for estimating tree heights of unmeasured trees in the BWI3.

Description

Usage

Arguments

Format

References

Examples