agb {itcSegment} | R Documentation |
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)
Arguments
H |
Tree height in meters. |
CA |
Crown diameter in meters. |
species |
Integer number indicating the species group: 1 = gymnosperm 2 = angiosperm |
Value
The AGB value in kilograms.
Author(s)
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
## Not run:
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)
## End(Not run)