Change LAS Class Codes (3D Analyst)

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Summary

Reassigns the classification codes and flags of .las files.

Usage

  • All .las files referenced by the LAS dataset will be evaluated by this tool, but only the files that contain the provided class codes will be modified.

  • Consider using this tool to update the classification of data points in .las files generated prior to the introduction of standardized class codes in the LAS 1.1 specifications.

  • The LAS format supports the classification of each point based on the specifications defined by the American Society for Photogrammetry and Remote Sensing (ASPRS). The ArcGIS platform applies the classification scheme specified for LAS format file version 1.4:

    Classification value Classification type

    0

    Never Classified

    1

    Unassigned

    2

    Ground

    3

    Low Vegetation

    4

    Medium Vegetation

    5

    High Vegetation

    6

    Building

    7

    Low Noise

    8

    Model Key / Reserved

    9

    Water

    10

    Rail

    11

    Road Surface

    12

    Overlap / Reserved

    13

    Wire – Guard

    14

    Wire – Conductor

    15

    Transmission Tower

    16

    Wire – Connector

    17

    Bridge Deck

    18

    High Noise

    19 – 63

    Reserved for ASPRS Definition (LAS 1.1 to 1.3 support up to class code 31)

    32 – 255

    User Definable (Only supported in LAS 1.0 and certain versions of 1.4)

Parameters

LabelExplanationData Type
Input LAS Dataset

The LAS dataset to process.

LAS Dataset Layer
Class Codes

Specifies the list of existing class codes to be modified and the change that will be made to its respective classification code value and classification flags.

Value Table
Compute statistics
(Optional)

Specifies whether statistics will be computed for the .las files referenced by the LAS dataset. Computing statistics provides a spatial index for each .las file, which improves analysis and display performance. Statistics also enhance the filtering and symbology experience by limiting the display of LAS attributes, such as classification codes and return information, to values that are present in the .las file.

  • Checked—Statistics will be computed. This is the default.
  • Unchecked—Statistics will not be computed.
Boolean
Processing Extent
(Optional)

The extent of the data that will be evaluated.

  • Default—The extent will be based on the maximum extent of all participating inputs. This is the default.
  • Union of Inputs—The extent will be based on the maximum extent of all inputs.
  • Intersection of Inputs—The extent will be based on the minimum area common to all inputs.
  • Current Display Extent—The extent is equal to the visible display. The option is not available when there is no active map.
  • As Specified Below—The extent will be based on the minimum and maximum extent values specified.
  • Browse—The extent will be based on an existing dataset.
Extent
Processing Boundary

A polygon feature that defines the area of interest to be processed.

Feature Layer
Process entire LAS files that intersect extent
(Optional)

Specifies how the area of interest will be used in determining how .las files will be processed. The area of interest is defined by the Processing Extent parameter value, the Processing Boundary parameter value, or a combination of both.

  • Unchecked—Only LAS points that intersect the area of interest will be processed. This is the default.
  • Checked—If any portion of a .las file intersects the area of interest, all the points in that .las file, including those outside the area of interest, will be processed.
Boolean
Update pyramid
(Optional)

Specifies whether the LAS dataset pyramid will be updated after the class codes are modified.

  • Checked—The LAS dataset pyramid will be updated. This is the default.
  • Unchecked—The LAS dataset pyramid will not be updated.
Boolean

Derived Output

LabelExplanationData Type
Output LAS Dataset

The updated LAS dataset.

LAS Dataset Layer

Licensing information

  • Basic: Requires 3D Analyst
  • Standard: Requires 3D Analyst
  • Advanced: Requires 3D Analyst

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