equations_GCubeR

A reference table compiling metadata about allometric equations used in GCubeR
(Vallet, Dagnelie, Algan, Rondeux, CNPF, etc.). This dataset is provided
for information purposes only and is not directly used by package functions.

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

equations_GCubeR function

A data frame with columns:<dl>
<dt>eq_id</dt>
<dd>Equation identifier (character)</dd><dt>method</dt>
<dd>Method family (Vallet, Dagnelie, Algan, Rondeux, CNPF...)</dd><dt>predicted_variable</dt>
<dd>Predicted variable (volume, biomass, carbon...)</dd><dt>output_unit</dt>
<dd>Unit of the output (m3, kg, tdm...)</dd><dt>species_id</dt>
<dd>Numeric species identifier (integer)</dd><dt>species_name_fr</dt>
<dd>Species name in French (character)</dd><dt>species_code</dt>
<dd>Species code (uppercase Latin name)</dd><dt>validity_region</dt>
<dd>Region of validity (text)</dd><dt>validity_range</dt>
<dd>Range of validity (text)</dd><dt>input_variable</dt>
<dd>Input variables required (e.g. c130, htot, dbh)</dd><dt>input_unit</dt>
<dd>Units of input variables (e.g. cm, m)</dd><dt>formula_type</dt>
<dd>Equation type (e.g. polynomial, exponential)</dd><dt>explicit_formula</dt>
<dd>Explicit formula as text</dd><dt>coeff_a</dt>
<dd>Equation coefficient a (numeric)</dd><dt>coeff_b</dt>
<dd>Equation coefficient b (numeric)</dd><dt>coeff_c</dt>
<dd>Equation coefficient c (numeric)</dd><dt>coeff_d</dt>
<dd>Equation coefficient d (numeric)</dd><dt>coeff_e</dt>
<dd>Equation coefficient e (numeric)</dd><dt>coeff_f</dt>
<dd>Equation coefficient f (numeric)</dd><dt>remarks</dt>
<dd>Additional notes</dd><dt>reference_source</dt>
<dd>Bibliographic source</dd>
</dl>

Format

Equations metadata for GCubeR — equations_GCubeR

A data frame with columns:<dl>
<dt>eq_id</dt>
<dd>Equation identifier (character)</dd>

<dt>method</dt>
<dd>Method family (Vallet, Dagnelie, Algan, Rondeux, CNPF...)</dd>

<dt>predicted_variable</dt>
<dd>Predicted variable (volume, biomass, carbon...)</dd>

<dt>output_unit</dt>
<dd>Unit of the output (m3, kg, tdm...)</dd>

<dt>species_id</dt>
<dd>Numeric species identifier (integer)</dd>

<dt>species_name_fr</dt>
<dd>Species name in French (character)</dd>

<dt>species_code</dt>
<dd>Species code (uppercase Latin name)</dd>

<dt>validity_region</dt>
<dd>Region of validity (text)</dd>

<dt>validity_range</dt>
<dd>Range of validity (text)</dd>

<dt>input_variable</dt>
<dd>Input variables required (e.g. c130, htot, dbh)</dd>

<dt>input_unit</dt>
<dd>Units of input variables (e.g. cm, m)</dd>

<dt>formula_type</dt>
<dd>Equation type (e.g. polynomial, exponential)</dd>

<dt>explicit_formula</dt>
<dd>Explicit formula as text</dd>

<dt>coeff_a</dt>
<dd>Equation coefficient a (numeric)</dd>

<dt>coeff_b</dt>
<dd>Equation coefficient b (numeric)</dd>

<dt>coeff_c</dt>
<dd>Equation coefficient c (numeric)</dd>

<dt>coeff_d</dt>
<dd>Equation coefficient d (numeric)</dd>

<dt>coeff_e</dt>
<dd>Equation coefficient e (numeric)</dd>

<dt>coeff_f</dt>
<dd>Equation coefficient f (numeric)</dd>

<dt>remarks</dt>
<dd>Additional notes</dd>

<dt>reference_source</dt>
<dd>Bibliographic source</dd>


</dl>

equations_GCubeR: Equations metadata for GCubeR

Description

Usage

Arguments

Format