dan2

Species-specific polynomial coefficients for the Dagnelie two-entry
tarif-2 volume equations used by <code>dagnelie_vc22_2</code>.

datasets

Provides tools for estimating forest metrics such as stem volume,
biomass, and carbon using regional allometric equations. The package
implements widely used models including
Dagnelie P., Rondeux J. & Palm R. (2013, ISBN:9782870161258)
"Cubage des arbres et des peuplements forestiers - Tables et equations"
<https://orbi.uliege.be/handle/2268/155356>,
Vallet P., Dhote J.-F., Le Moguedec G., Ravart M. & Pignard G. (2006)
"Development of total aboveground volume equations for seven important forest tree species in France"
<doi:10.1016/j.foreco.2006.03.013>,
Pauwels D. & Rondeux J. (1999, ISSN:07779992)
"Tarifs de cubage pour les petits bois de meleze (Larix sp.) en Ardenne"
<https://orbi.uliege.be/handle/2268/96128>,
Massenet J.-Y. (2006)
"Chapitre IV: Estimation du volume"
<https://jymassenet-foret.fr/cours/dendrometrie/Coursdendrometriepdf/Dendro4-2009.pdf>,
France Valley (2025)
"Bilan Carbone Forestier - Methodologie"
<https://www.france-valley.com/hubfs/Bilan%20Carbone%20Forestier.pdf>.
Its modular structure allows transparent integration of bibliographic or
user-defined allometric relationships.

David Linchant

GCubeR

Estimation of Forest Volume, Biomass, and Carbon

Juliette Defontaine

Samuel Douin

Timon Luizi

Pierre Bosman

dan2 function

A data frame with columns:<dl>
<dt>species_code</dt>
<dd>Tree species code (character)</dd><dt>coeff_a</dt>
<dd>Coefficient a (numeric)</dd><dt>coeff_b</dt>
<dd>Coefficient b (numeric)</dd><dt>coeff_c</dt>
<dd>Coefficient c (numeric)</dd><dt>coeff_d</dt>
<dd>Coefficient d (numeric)</dd><dt>coeff_e</dt>
<dd>Coefficient e (numeric)</dd><dt>coeff_f</dt>
<dd>Coefficient f (numeric)</dd><dt>min_c130</dt>
<dd>Minimum circumference at 1.30 m (cm)</dd><dt>max_c130</dt>
<dd>Maximum circumference at 1.30 m (cm)</dd><dt>min_htot</dt>
<dd>Minimum total height (m)</dd><dt>max_htot</dt>
<dd>Maximum total height (m)</dd>
</dl>

Format

Dagnelie coefficients (tarif 2) — dan2

A data frame with columns:<dl>
<dt>species_code</dt>
<dd>Tree species code (character)</dd>

<dt>coeff_a</dt>
<dd>Coefficient a (numeric)</dd>

<dt>coeff_b</dt>
<dd>Coefficient b (numeric)</dd>

<dt>coeff_c</dt>
<dd>Coefficient c (numeric)</dd>

<dt>coeff_d</dt>
<dd>Coefficient d (numeric)</dd>

<dt>coeff_e</dt>
<dd>Coefficient e (numeric)</dd>

<dt>coeff_f</dt>
<dd>Coefficient f (numeric)</dd>

<dt>min_c130</dt>
<dd>Minimum circumference at 1.30 m (cm)</dd>

<dt>max_c130</dt>
<dd>Maximum circumference at 1.30 m (cm)</dd>

<dt>min_htot</dt>
<dd>Minimum total height (m)</dd>

<dt>max_htot</dt>
<dd>Maximum total height (m)</dd>


</dl>

dan2: Dagnelie coefficients (tarif 2)

Description

Usage

Arguments

Format