R: Filter the surface points

filter_surfacepoints {lidR} | R Documentation

## Filter the surface points

### Description

This function is superseded by the algorithm highest usable in decimate_points

### Usage

    filter_surfacepoints(las, res)

### Arguments

`las` | An object of class LAS or LAScatalog.
`res` | numeric. The resolution of the grid used to filter the point cloud

### Value

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

### 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.

- 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.

### See Also

Other filters: `filter_duplicates()`, `filter_poi()`, `filters`

[Package lidR version 3.2.2 Index]