getTLS2D: Grid snapshot

In rTLsDeep: Post-Hurricane Damage Severity Classification from TLS and AI

Grid snapshot

Description

This function captures a 2D grid snapshot of the TLS-derived 3D Point Cloud

Usage

getTLS2D(las, res = 0.05, by = "xz", func = ~list(Z = max(Z)), scale = TRUE)

Arguments

las	An object of class LAS [lidR::readLAS()].
res	Numeric defining the resolution or grid cell size of the 2D image.
by	Character defining the grid snapshot view: 'xz', 'yx' or 'xy'. Default: 'xz'.
func	formula defining the equation to be passed in each grid. Default: ~list(Z = max(Z)).
scale	if TRUE, the xyz coordinates will be scaled to local coordinates by subtracting their values to their corresponding minimum values (e.g. x - min(x). Default is TRUE.

Value

Returns an object of class SpatRaste containing the 2D grid snapshot of the TLS 3D point cloud.

Examples

#Loading lidR and viridis libraries
library(lidR)
library(viridis)

# Path to las file
lasfile <- system.file("extdata", "tree_c1.laz", package="rTLsDeep")

# Reading las file
las<-readLAS(lasfile)

# Visualizing las file
suppressWarnings(plot(las))

# Creating a 2D grid snapshot
func = ~list(Z = max(Z))
by="xz"
res=0.05
scale=TRUE

g<-getTLS2D(las, res=res, by=by, func = func, scale=scale)

# Visualizing 2D grid snapshot
plot(g, asp=TRUE, col=viridis::viridis(100),axes=FALSE, xlab="",ylab="")

# Exporting 2D grid snapshot as png file
output_png = paste0(tempfile(), '.png')
png(output_png, units="px", width=1500, height=1500)
terra::image(g, col=viridis::viridis(100))

dev.off()

rTLsDeep documentation built on March 31, 2023, 7:15 p.m.