normalize_las: Normalize 'LAS' object representing segmented tree.

In tReeTraits: Calculate Tree Traits from Terrestrial Lidar

Normalize 'LAS' object representing segmented tree.

Description

Function to normalize LAS object. Function calculates ground level based on the parameter specified by 'quantile', subtracts it from all 'Z'.

Usage

normalize_las(las, quantile = c(0.001))

Arguments

las	'LAS' object from 'lidR' package representing individually segmented tree
quantile	Z quantile at which grown level is specified since ground points may not be identifiable with common algorithms if ground points are removed during segmentation

Value

A 'LAS' object with Z values normalized to ground level.

Examples

library(lidR)
las = readLAS(system.file("extdata", "tree_0744.laz", package="tReeTraits"))
# view histogram of Z values ranging from  -18 to -7 m
hist(las$Z)
las = normalize_las(las)
# view histogram of Z values now ranging from  0 to 11 m
hist(las$Z)

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