engine {lidR}

Functions for the LAScatalog processing engine not meant to be called directly by users

Description

Functions for the LAScatalog processing engine not meant to be called directly by users. They are exported for debugging and to simplify export of internal functions when processing in parallel

Usage

engine_apply(
  .CHUNKS,
  .FUN,
  .PROCESSOPT,
  .OUTPUTOPT,
  .GLOBALS = NULL,
  .AUTOREAD = FALSE,
  .AUTOCROP = FALSE,
  ...
)

engine_chunks(ctg, realignment = FALSE, plot = opt_progress(ctg))

engine_crop(x, bbox)

engine_merge(ctg, any_list, ...)

engine_write(x, path, drivers)

Arguments

.CHUNKS

list. list of LAScluster

.FUN

function. function that respects a template (see catalog_apply)

.PROCESSOPT

list. Processing option

.OUTPUTOPT

list. Output option

.GLOBALS

list. Force export of some object in workers

.AUTOREAD

bool. Enable autoread

.AUTOCROP

bool. Enable autocrop

...

parameters of .FUN

ctg

LAScatalog

realignment

FALSE or list(res = x, start = c(y,z)). Sometimes the chunk must be aligned with a raster, for example to ensure the continuity of the output. If the chunk size is 800 and the expected product is a raster with a resolution of 35, 800 and 35 are not compatible and will create 2 different partial pixels on the edges. The realignment option forces the chunk to fit the grid alignment.

plot

logical. Displays the chunk pattern.

x

LAS, Raster, stars, SpatRaster,sf, sfc, Spatial

bbox

bbox

any_list

list of LAS, Raster, stars, SpatRaster, sf, sfc, Spatial, data.frame

path

strings

drivers

list. Drivers of a LAScatalog

See Also

Other LAScatalog processing engine: engine_options

Other LAScatalog processing engine: engine_options