lasfilterduplicates

0th

Percentile

Filter duplicated points

Filter points that appear more than once in the point cloud according to their X Y Z coordinates

Usage
lasfilterduplicates(las)
Arguments
las

An object of class LAS or LAScatalog.

Value

If the input is a LAS object, returns a LAS object. If the input is a LAScatalog, returns a LAScatalog.

Working with 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

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.

• cores: How many cores are used. More cores means more data is loaded at once.

• 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 is size equal to 0 (processing by file), ORIGINALFILENAME.

• laz_compression: write las or laz files

• select: The function will write files equivalent to the original ones. Thus select = "*" and cannot be changed.

• filter: Read only points of interest.

Other lasfilters: lasfiltersurfacepoints, lasfilters, lasfilter