rlas (version 1.7.0)

public_header_block_tools: Public Header Block Tools

Description

Create or update a header for a las file from a dataset. A las file consists of two parts. A header that describes the data and the data itself. These functions make valid headers (public header block only) that can be used in write.las.

Usage

header_create(data)
header_update(header, data)

Value

A list containing the metadata required to write a las file.

Arguments

data

data.frame or data.table

header

list. A header

Details

header_create makes a full header from data. header_update modifies the information that needs to be updated. But most of the original information is not modified, for example point data format is kept 'as is'.

See Also

Other header_tools: crs_tools, extra_bytes_attribute_tools, fwf_interpreter()

Examples

lasdata = data.frame(X = c(339002.889, 339002.983, 339002.918),
                     Y = c(5248000.515, 5248000.478, 5248000.318),
                     Z = c(975.589, 974.778, 974.471),
                     gpstime = c(269347.281418006, 269347.281428006, 269347.281438006),
                     Intensity = c(82L, 54L, 27L),
                     ReturnNumber = c(1L, 1L, 2L),
                     NumberOfReturns = c(1L, 1L, 2L),
                     ScanDirectionFlag = c(1L, 1L, 1L),
                     EdgeOfFlightline = c(1L, 0L, 0L),
                     Classification = c(1L, 1L, 1L),
                     ScanAngleRank = c(-21L, -21L, -21L),
                     UserData = c(32L, 32L, 32L),
                     PointSourceID = c(17L, 17L, 17L),
                     treeID = c(1L, 1L, 1L))

lasheader = header_create(lasdata)