itcSegment (version 1.0)

agb: Aboveground biomass prediction using height and crown diameter

Description

Prediction of aboveground biomass (AGB) using height and crown diameter and the equations of Jucker et al. (2017).

Usage

agb(H = NULL, CA = NULL, species = 1)

Value

The AGB value in kilograms.

Arguments

H

Tree height in meters.

CA

Crown diameter in meters.

species

Integer number indicating the species group:

1 = gymnosperm

2 = angiosperm

Author

Michele Dalponte

References

T. Jucker, J. Caspersen, J. Chave, C. Antin, N. Barbier, F. Bongers, M. Dalponte, K. Y. van Ewijk, D. I. Forrester, M. Haeni, S. I. Higgins, R. J. Holdaway, Y. Iida, C. Lorimer, P. L. Marshall, S. Momo, G. R. Moncrieff, P. Ploton, L. Poorter, K. A. Rahman, M. Schlund, B. Sonke, F. J. Sterck, A. T. Trugman, V. A. Usoltsev, M. C. Vanderwel, P. Waldner, B. M. M. Wedeux, C. Wirth, H. Woell, M. Woods, W. Xiang, N. E. Zimmermann, and D. A. Coomes, "Allometric equations for integrating remote sensing imagery into forest monitoring programs," Global Change Biology, 23 (1), pp. 177-190, January 2017.

Examples

if (FALSE) {
data(lasData)

## function takes a while to run

#Extraction of the ITCs
se<-itcLiDAR(lasData$X,lasData$Y,lasData$Z,epsg=32632)

summary(se)

#Computation of the crown diameter from the crown area
se$CD_m<-2*sqrt(se$CA_m2/pi)

#AGB prediction
se$agb<-NA
se$agb<-agb(se$Height_m,se$CD_m,species=1)

summary(se)

}