lidR (version 2.1.4)

lasfilters: Predefined filters

Description

Select only some returns

Usage

lasfilterfirst(las)
lasfilterfirstlast(las)
lasfilterfirstofmany(las)
lasfilterground(las)
lasfilterlast(las)
lasfilternth(las, n)
lasfiltersingle(las)
lasfilterfirstofmany(las)

Arguments

las

An object of class LAS

n

the position in the return sequence

Value

An object of class LAS

Details

• lasfilterfirst Select only the first returns.

• lasfilterfirstlast Select only the first and last returns.

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

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

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

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

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

See Also

Other lasfilters: lasfilterduplicates, lasfiltersurfacepoints, lasfilter

Other lasfilters: lasfilterduplicates, lasfiltersurfacepoints, lasfilter

Other lasfilters: lasfilterduplicates, lasfiltersurfacepoints, lasfilter

Other lasfilters: lasfilterduplicates, lasfiltersurfacepoints, lasfilter

Other lasfilters: lasfilterduplicates, lasfiltersurfacepoints, lasfilter

Other lasfilters: lasfilterduplicates, lasfiltersurfacepoints, lasfilter

Other lasfilters: lasfilterduplicates, lasfiltersurfacepoints, lasfilter

Other lasfilters: lasfilterduplicates, lasfiltersurfacepoints, lasfilter

Other lasfilters: lasfilterduplicates, lasfiltersurfacepoints, lasfilter

Examples

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

firstReturns  = lasfilterfirst(lidar)
groundReturns = lasfilterground(lidar)
# }