Check if tiles are valid (correct size and aligned to grid)

Usage

check_tiling(path, tilesize = 1000, full.names = FALSE, tolerance = 1)

Arguments

path: Character. Path to a LAS/LAZ/COPC file, a directory containing LASfiles, or a Virtual Point Cloud (.vpc) referencing LASfiles.
tilesize: Numeric. Expected tile size in units (default: 1000)
full.names: Logical. Whether to return full file paths (default: FALSE)
tolerance: Numeric. Tolerance in coordinate units for snapping extents to grid (default: 1, submeter inaccuaries are ignored). If > 0, coordinates within this distance of a grid line will be snapped before processing. Set to 0 to disable snapping.

Value

A data.frame with columns:

filename: Name of the file
size_ok: Logical indicating if tile has correct dimensions
grid_ok: Logical indicating if tile is aligned to grid
valid: Logical indicating if tile is both correct size and aligned

Details

When tolerance > 0, coordinates within that distance of a grid line will be snapped to that grid line before validation. This helps handle minor floating point inaccuracies or small coordinate errors while preserving coordinates that are genuinely misaligned.

Examples

folder <- system.file("extdata", package = "managelidar")
las_files <- list.files(folder, full.names = T, pattern = "*20240327.laz")

# check tiling scheme with 10m tolerance
las_files |> check_tiling(tolerance = 10)
#> Error in loadNamespace(x): there is no package called ‘lasR’