val_vc22

Species-specific polynomial coefficients (a, b, c) used in the Vallet model
to compute commercial wood volume (vc22) up to a 7 cm top diameter.

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

val_vc22 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>
</dl>

Format

Vallet coefficients for merchantable volume (vc22) — val_vc22

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>


</dl>

val_vc22: Vallet coefficients for merchantable volume (vc22)

Description

Usage

Arguments

Format