get_crown_volume_alpha: Estimate crown volume by alpha shape volume

In tReeTraits: Calculate Tree Traits from Terrestrial Lidar

Estimate crown volume by alpha shape volume

Description

This function volume of a 'LAS' object by thinning to a resolution specified by 'resolution', and estimating volume by fitting a alpha shape volume. Crowns must be segmented using [segment_crown()].

Usage

get_crown_volume_alpha(las, resolution = 0.1, alpha = 0.5)

Arguments

las	'LAS' object from 'lidR' package representing a tree. Crowns must be segmented using [segment_crown()].
resolution	numeric - resolution of initial voxelization to increase speed
alpha	numeric - alpha for the computation of the 3D alpha-shape of the point cloud. See [alphashape3d::ashape3d].

Value

A named numeric vector with element 'crown_volume_alpha' (m^3).

Examples

las = lidR::readLAS(system.file("extdata", "tree_0744.laz", package="tReeTraits"))
cbh = get_crown_base(las, threshold=0.25, sustain=2)
las = segment_crown(las, cbh)
get_crown_volume_voxel(las)
get_crown_volume_alpha(las)
sf::st_area(convex_hull_2D(las)) #profile area, convex hull
sf::st_area(voxel_hull_2D(las)) #profile area, voxel hull
get_lacunarity(las)

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