catalog_boundaries function

Computes the polygon that encloses the points

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.

catalog_boundaries(ctg, ...)

Arguments

• ctg: A LAScatalog
• ...: propagated to st_concave_hull

Returns

A LAScatalog with true boundaries

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)