lidR (version 4.1.0)

catalog_boundaries: Computes the polygon that encloses the points

Description

Computes the polygon that encloses the points. It reads all the files one by one and computes a concave hull using the st_concave_hull function. When all the hulls are computed it updates the LAScatalog to set the true polygons instead of the bounding boxes.

Usage

catalog_boundaries(ctg, ...)

Value

A LAScatalog with true boundaries

Arguments

ctg

A LAScatalog

...

propagated to st_concave_hull

Non-supported LAScatalog options

The options `select`, `output files`, `chunk size`, `chunk buffer`, `chunk alignment` are not supported and not respected in `catalog_boundaries*` because the function must always process by file, without buffer and knows which attributes to load.

Examples

LASfile <- system.file("extdata", "Megaplot.laz", package="lidR")
ctg <- readLAScatalog(LASfile, filter = "-drop_z_below 0.5")
ctg2 <- catalog_boundaries(ctg, concavity = 1, length_threshold = 15)
plot(ctg)
plot(ctg2, add = TRUE)