Filter points that appear more than once in the point cloud according to their X Y Z coordinates
filter_duplicates(las)
An object of class LAS or LAScatalog.
If the input is a LAS
object, returns a LAS
object. If the input is a
LAScatalog
, returns a LAScatalog
.
This section appears in each function that supports a LAScatalog as input.
In lidR
when the input of a function is a LAScatalog the
function uses the LAScatalog processing engine. The user can modify the engine options using
the available options. A careful reading of the
engine documentation is recommended before processing LAScatalogs
. Each
lidR
function should come with a section that documents the supported engine options.
The LAScatalog
engine supports .lax
files that significantly improve the computation
speed of spatial queries using a spatial index. Users should really take advantage a .lax
files,
but this is not mandatory.
Supported processing options for a LAScatalog
(in bold). For more details see the
LAScatalog engine documentation:
chunk size: How much data is loaded at once.
chunk buffer: This function guarantee a strict wall-to-wall continuous output. The buffer
option is not considered.
chunk alignment: Align the processed chunks.
progress: Displays a progression estimation.
output files*: Mandatory because the output is likely to be too big to be returned
in R and needs to be written in las/laz files. Supported templates are {XLEFT}
, {XRIGHT}
,
{YBOTTOM}
, {YTOP}
, {XCENTER}
, {YCENTER}
{ID}
and, if
chunk size is equal to 0 (processing by file), {ORIGINALFILENAME}
.
select: The function will write files equivalent to the original ones. Thus select = "*"
and cannot be changed.
filter: Read only points of interest.
Other filters:
filter_poi()
,
filter_surfacepoints()
,
filters