FirstLastReturn: FUSION R command line interface - Extracts first and last...

In bmcgaughey1/fusionwrapr: R Interface to FUSION-LTK Command Line Programs

FUSION R command line interface – Extracts first and last returns from a point cloud.

Description

FirstLastReturn creates command lines for the FUSION FirstLastReturn program and optionally executes them.

Usage

FirstLastReturn(
  outputfile = NULL,
  datafile = NULL,
  quiet = FALSE,
  verbose = FALSE,
  version = FALSE,
  newlog = FALSE,
  log = NULL,
  locale = FALSE,
  nolaszipdll = FALSE,
  skipfilecheck = FALSE,
  index = FALSE,
  ignoreoverlap = FALSE,
  lastnotfirst = FALSE,
  uselas = FALSE,
  lda = FALSE,
  precision = NULL,
  use64bit = TRUE,
  runCmd = TRUE,
  saveCmd = TRUE,
  cmdFile = NULL,
  cmdClear = FALSE,
  echoCmd = FALSE,
  comment = NULL
)

Arguments

outputfile	character (required): Base name for output data files...first and last return data will be written to separate files.
datafile	character (required): LIDAR data file template or name of a text file containing a list of file names (must have .txt extension).
quiet	boolean: Suppress all output during the run.
verbose	boolean: Display all status information during the run.
version	boolean: Report version information and exit with no processing.
newlog	boolean: Erase the existing log file and start a new log
log	character: Use the name specified for the log file.
locale	boolean: Adjust program logic to input and output locale-specific numeric formats (e.g. use a comma for the decimal separator).
nolaszipdll	boolean: Suppress the use of the LASzip dll (c) Martin Isenburg... removes support for compressed LAS (LAZ) files. This option is only useful for programs that read or write point files.
skipfilecheck	boolean: Skip logic that checks for valid point files and removes those that are invalid prior to the start of point processing. This option is designed to overcome some limitations with windows and wildcard processing. This option is only useful for programs that read point data.
index	boolean: Create FUSION index files for the outputfile.
ignoreoverlap	boolean: Ignore points with the overlap flag set (LAS V1.4+ format).
lastnotfirst	boolean: Do not include first returns that are also last returns in the last returns output.
uselas	boolean: Use information from LAS files to determine which returns are first and last returns.
lda	boolean: Write sample files using FUSION's LDA format when using LAS input files. The default behavior of FirstLastReturn is to write data in LAS format when the input data are in LAS format. When using input data in a format other than LAS, output files are written in LDA format.
precision	character: "#,#,#": Control the scale factor used for X, Y, and Z values in output LAS files. These values will override the values in the source LAS files. There is rarely any need for the scale parameters to be smaller than 0.001.
use64bit	boolean: indicates 64-bit version of the program should be used.
runCmd	boolean: indicates command line should be executed.
saveCmd	boolean: indicates command line should be written to a file.
cmdFile	character: contains the name of the file to which commands should be written.
cmdClear	boolean: indicates file for commands should be deleted (cleared) before the command line is written.
echoCmd	boolean: indicates command line should be displayed.
comment	character string containing comment to be written to command file before writing the actual command. Only used when runCmd = FALSE and saveCmd = TRUE. When written, there is always a blank line before the comment line in the command file.

Value

Return value depends on runCmd. if runCmd = TRUE, return value is the (invisible) integer value return from the operating system after running the command. if runCmd = FALSE, return value is the (invisible) command line.

Multiple Commands

LTKFunctions generate a separate command for each item when the required parameters are lists. This is useful when you want to use the same command and options but different input data and output files. However, this works only when the switches and options are the same for all commands (not lists). If you try to use a list of switches and/or options and a list of input files, you will produce commands using all sets of switches and/or options for every input file.

See Also

Other LTKFunctions: CSV2Grid(), CanopyMaxima(), CanopyModel(), Catalog(), ClipDTM(), ClipData(), CloudMetrics(), Cover(), DTMDescribe(), DensityMetrics(), FilterData(), GridMetrics(), GridSample(), GridSurfaceCreate(), GridSurfaceStats(), GroundFilter(), IntensityImage(), JoinDB(), MergeDTM(), MergeData(), MergeRaster(), RepairGridDTM(), ReturnDensity(), SplitDTM(), SurfaceSample(), SurfaceStats(), TINSurfaceCreate(), ThinData(), TopoMetrics(), TreeSeg(), fusionwrapr-package

Examples

## Not run: 
FirstLastReturn("pts", "*.las", usselas = TRUE)

## End(Not run)

bmcgaughey1/fusionwrapr documentation built on Dec. 1, 2024, 7:13 a.m.