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lidR (version 3.2.3)

filters: Predefined point of interest filters

Description

Select only some returns

Usage

filter_first(las)

filter_firstlast(las)

filter_firstofmany(las)

filter_ground(las)

filter_last(las)

filter_nth(las, n)

filter_single(las)

Arguments

las

An object of class LAS

n

the position in the return sequence

Value

An object of class LAS

Details

  • filter_first Select only the first returns.

  • filter_firstlast Select only the first and last returns.

  • filter_ground Select only the returns classified as ground according to LAS specification.

  • filter_last Select only the last returns i.e. the last returns and the single returns.

  • filter_nth Select the returns from their position in the return sequence.

  • filter_firstofmany Select only the first returns from pulses which returned multiple points.

  • filter_single Select only the returns that return only one point.

See Also

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

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

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

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

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

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

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

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

Examples

Run this code
# NOT RUN {
LASfile <- system.file("extdata", "Megaplot.laz", package="lidR")
lidar = readLAS(LASfile)

firstReturns  = filter_first(lidar)
groundReturns = filter_ground(lidar)
# }

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