Extra Bytes Attributes Tools
Functions that update a header to describe Extra Bytes Attributes according to the LAS specifications
header_add_extrabytes(header, data, name, desc) header_add_extrabytes_manual( header, name, desc, type, offset = NULL, scale = NULL, max = NULL, min = NULL, NA_value = NULL )
header |
list |
data |
vector. Data that must be added in the extrabytes attributes. |
name |
character. The name of the extrabytes attributes to add in the file. |
desc |
character. The description of the extrabytes attributes to add in the file. |
type |
integer. The data type of the extrabytes attributes (page 25 of the spec). |
scale, offset |
numeric. The scale and offset of the data. NULL if not relevant. |
min, max |
numeric or integer. The minimum and maximum value of the data. NULL if not relevant. |
NA_value |
numeric or integer. NA is not a valid value. At writing time it will be replaced by this value that will be considered as NA. NULL if not relevant. |
Other header_tools:
crs_tools,
public_header_block_tools
data = 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),
ScanAngle = c(-21L, -21L, -21L),
UserData = c(32L, 32L, 32L),
PointSourceID = c(17L, 17L, 17L),
treeID = c(1L, 1L, 1L))
lasheader = header_create(data)
lasheader[["Variable Length Records"]]
lasheader = header_add_extrabytes(lasheader, data$treeID, "treeID", "An id for each tree")
lasheader[["Variable Length Records"]]Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.