get_crown_lever_arm: Calculate crown leverage from point cloud

In tReeTraits: Calculate Tree Traits from Terrestrial Lidar

Calculate crown leverage from point cloud

Description

This function calculates the lever arm of canopies. The function #' is a simple wrapper for 'get_area_profile()'. It calculates the crown area in segments defined by 'segement_height', multiplies the area of each of those segments by their height, and then returns the sum of all segments. This is proportaionl to drag calculations on the tree assuming windspeed is invariant with height.

Usage

get_crown_lever_arm(las, segment_height = 0.25, quantile = c(0.001), angle = 0)

Arguments

las	'LAS' object from 'lidR' package representing individually segmented tree, with the crown labeled. See 'segment_crown()'
segment_height	numeric - height of each segment in which to calculate area
quantile	numeric - quantile at which width is measured Values in the interval approaching 0 (e.g., 0.001) are recommended to trim random noise
angle	numeric - angle at which to rotate the point cloud prior to estimating area. Useful in a loop if quantifying mulitple angles

Value

A numeric value representing the crown lever arm.

Examples

library(lidR)
las = readLAS(system.file("extdata", "tree_0744.laz", package="tReeTraits"))
las = clean_las(las)
las = segment_crown(las)
print(get_crown_lever_arm(las))

tReeTraits documentation built on Feb. 26, 2026, 1:07 a.m.