Print Information about the Point Cloud

This function prints useful information about LAS/LAZ files, including the file version, size, bounding box, CRS, and more. When called without parameters, it returns a pipeline stage. For convenience, it can also be called with the path to a file for immediate execution, which is likely the most common use case (see examples).

Usage

info(f)

Arguments

f

string (optional) Path to a LAS/LAZ file.

Value

nothing. The stage is used for its side effect of printing

Examples

f <- system.file("extdata", "MixedConifer.las", package = "lasR")

# Return a pipeline stage
exec(info(), on = f)
#> Size         : 1.43 MB
#> Extent       : 481260.00 481349.99 3812921.09 3813010.99 (xmin, xmax, ymin, ymax)
#> Points       : 37.66 thousands
#> Coord. ref.  : NAD83 / UTM zone 12N
#> Schema       :
#> Name: flags           | uchar  | Desc: Internal 8-bit mask reserved lasR core engine
#> Name: X               | int    | Desc: X coordinate
#> Name: Y               | int    | Desc: Y coordinate
#> Name: Z               | int    | Desc: Z coordinate
#> Name: Intensity       | ushort | Desc: Pulse return magnitude
#> Name: ReturnNumber    | uchar  | Desc: Pulse return number for a given output pulse
#> Name: NumberOfReturns | uchar  | Desc: Total number of returns for a given pulse
#> Name: Classification  | uchar  | Desc: The 'class' attributes of a point
#> Name: UserData        | uchar  | Desc: Used at the user’s discretion
#> Name: PointSourceID   | short  | Desc: Source from which this point originated
#> Name: ScanAngle       | char   | Desc: Rounded angle at which the laser point was output
#> Name: gpstime         | double | Desc: Time tag value at which the point was observed
#> Name: treeID          | double | Desc: An ID for each segmented tree
#> NULL

# Convenient user-friendly usage
info(f)
#> Size         : 1.43 MB
#> Extent       : 481260.00 481349.99 3812921.09 3813010.99 (xmin, xmax, ymin, ymax)
#> Points       : 37.66 thousands
#> Coord. ref.  : NAD83 / UTM zone 12N
#> Schema       :
#> Name: flags           | uchar  | Desc: Internal 8-bit mask reserved lasR core engine
#> Name: X               | int    | Desc: X coordinate
#> Name: Y               | int    | Desc: Y coordinate
#> Name: Z               | int    | Desc: Z coordinate
#> Name: Intensity       | ushort | Desc: Pulse return magnitude
#> Name: ReturnNumber    | uchar  | Desc: Pulse return number for a given output pulse
#> Name: NumberOfReturns | uchar  | Desc: Total number of returns for a given pulse
#> Name: Classification  | uchar  | Desc: The 'class' attributes of a point
#> Name: UserData        | uchar  | Desc: Used at the user’s discretion
#> Name: PointSourceID   | short  | Desc: Source from which this point originated
#> Name: ScanAngle       | char   | Desc: Rounded angle at which the laser point was output
#> Name: gpstime         | double | Desc: Time tag value at which the point was observed
#> Name: treeID          | double | Desc: An ID for each segmented tree