engine_options: Get or set LAScatalog processing engine options

In lidR: Airborne LiDAR Data Manipulation and Visualization for Forestry Applications

Get or set LAScatalog processing engine options

Description

The names of the options and their roles are documented in LAScatalog. The options are used by all the functions that support a LAScatalog as input. Most options are easy to understand and to link to the documentation of LAScatalog but some need more details. See section 'Details'.

Usage

opt_chunk_buffer(ctg)

opt_chunk_buffer(ctg) <- value

opt_chunk_size(ctg)

opt_chunk_size(ctg) <- value

opt_chunk_alignment(ctg)

opt_chunk_alignment(ctg) <- value

opt_restart(ctg) <- value

opt_progress(ctg)

opt_progress(ctg) <- value

opt_stop_early(ctg)

opt_stop_early(ctg) <- value

opt_wall_to_wall(ctg)

opt_wall_to_wall(ctg) <- value

opt_independent_files(ctg)

opt_independent_files(ctg) <- value

opt_output_files(ctg)

opt_output_files(ctg) <- value

opt_laz_compression(ctg)

opt_laz_compression(ctg) <- value

opt_merge(ctg)

opt_merge(ctg) <- value

opt_select(ctg)

opt_select(ctg) <- value

opt_filter(ctg)

opt_filter(ctg) <- value

Arguments

ctg	An object of class LAScatalog
value	An appropriate value depending on the expected input.

Details

• opt_restart() automatically sets the chunk option named "drop" in such a way that the engine will restart at a given chunk and skip all previous chunks. Useful for restarting after a crash.

• opt_independent_file() automatically sets the chunk size, chunk buffer and wall-to-wall options to process files that are not spatially related to each other, such as plot inventories.

• opt_laz_compression() automatically modifies the drivers to write LAZ files instead of LAS files.

See Also

Other LAScatalog processing engine: engine

Examples

LASfile <- system.file("extdata", "Megaplot.laz", package="lidR")
ctg = readLAScatalog(LASfile)

plot(ctg, chunk_pattern = TRUE)

opt_chunk_size(ctg) <- 150
plot(ctg, chunk_pattern = TRUE)

opt_chunk_buffer(ctg) <- 10
plot(ctg, chunk_pattern = TRUE)

opt_chunk_alignment(ctg) <- c(270,250)
plot(ctg, chunk_pattern = TRUE)

summary(ctg)

opt_output_files(ctg) <- "/path/to/folder/templated_filename_{XBOTTOM}_{ID}"
summary(ctg)

lidR documentation built on Sept. 8, 2023, 5:10 p.m.