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Convert LAS

Summary

Converts LAS files between different compression methods, file versions, and point record formats.

Usage

  • This tool can convert between LAS, ZLAS, and LAZ files by selecting either the individual file, a folder containing the files to be processed, or a LAS dataset to reference a collection of LAS and ZLAS files.

  • Data in the source LAS file will be lost if the output file version and point record format do not support the information. It is recommended that the input files have the same LAS file version and point record format when the output is being assigned to a specific version.

  • Rearranging the LAS points will improve display and analysis performance but requires the generation of a scratch LAS file. Statistics will be automatically computed when the LAS points are rearranged.

  • Only uncompressed LAS files can be edited. However, ZLAS files can be used as inputs to geoprocessing tools that perform analysis operations.

Syntax

ConvertLas_conversion (in_las, target_folder, {file_version}, {point_format}, {compression}, {las_options}, {out_las_dataset})
ParameterExplanationData Type
in_las

The LAS data that will be converted. A folder can be specified to process all of the LAS files contained therein.

Layer File; LAS Dataset Layer; Folder; File
target_folder

The existing folder that the output LAS files will be written to.

Folder
file_version
(Optional)

The LAS file version of the output files.

  • SAME_AS_INPUTThe output file version will be the same as the input. This is the default.
  • 1.0The base version for the LAS format which supported 256 class codes.
  • 1.1The output file version will be 1.1. Class codes were reduced to 32, but support for classification flags was added.
  • 1.2The output file version will be 1.2. Support for red-green-blue (RGB) color channels and GPS time was added.
  • 1.3The output file version will be 1.3. Storage of lidar waveform data for point record formats that are not supported in the ArcGIS platform was added.
  • 1.4 The output file version will be 1.4. Support for coordinate system definition using Well Known Text (WKT) convention, 256 class codes, up to 15 discrete returns per pulse, higher precision scan angle, and overlap classification flag was added.
String
point_format
(Optional)

Specifies the point record format of the output LAS files. The available options will vary based on the output LAS file version.

  • 0The base type for storing discrete LAS points that supports attributes such as lidar intensity, return values, scan angle, scan direction, and edge of flight line.
  • 1Adds GPS time to the attributes supported in point format 0.
  • 2Adds RGB values to the attributes supported in point format 0.
  • 3Adds RGB values and GPS time to the attributes supported in point format 0.
  • 6The preferred base type for storing discrete LAS points in LAS file version 1.4.
  • 7Adds RGB values to the attributes supported in point format 6.
  • 8Adds RGB and near-infrared values to the attributes supported in point format 6.
String
compression
(Optional)

Specifies whether the output LAS file will in a compressed format or the standard LAS format.

  • NO_COMPRESSIONThe output will be in the standard LAS format (*.las). This is the default.
  • ZLASOutput LAS files will be compressed in the zLAS format.
  • LAZOutput LAS files will be compressed in the LAZ format.
  • SAME_AS_INPUTThe compression will be the same as the input.
String
las_options
[las_options,...]
(Optional)

Specifies modifications that can be made to reduce the size of the output LAS files and improve their usability and performance in display and analysis operations.

  • REARRANGE_POINTSPoints will be rearranged to improve display and analysis performance. Statistics will be automatically computed during this process. This option is selected by default.
  • REMOVE_VLRVariable-length records that are added after the header as well as the points records of each file will be removed.
  • REMOVE_EXTRA_BYTESExtra bytes that may be present with each point from the input file will be removed.
String
out_las_dataset
(Optional)

The output LAS dataset referencing the newly created LAS files.

LAS Dataset

Code sample

ConvertLas example 1 (Python window)

The following sample demonstrates the use of this tool in the Python window.

import arcpy
arcpy.conversion.ConvertLas('2014_survey.zlas', '2014_unclassified_collection', 
                            '1.4', 7, 'NO_COMPRESSION',
                            ['REMOVE_VLR', 'REMOVE_EXTRA_BYTES', 'REARRANGE_POINTS'], 
                            '2014_unclassified_collection/2014_Survey_Collection.lasd')

Licensing information

  • Basic: Requires Spatial Analyst or 3D Analyst
  • Standard: Yes
  • Advanced: Yes

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