LAS Point Statistics By Area (3D Analyst)

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Summary

Evaluates the statistics of LAS points that overlay the area defined by polygon features.

Usage

  • You can have the LAS dataset layer limit the LAS points that are displayed and processed by selecting any combination of classification codes, classification flags, and return values in the layer's filter settings. The filters can be defined on the Layer Properties dialog box or in the Make LAS Dataset Layer tool.

  • Consider using this tool to determine the characteristics of lidar points over regions of interest defined by polygon boundaries. Only elevation obtained from LAS points will be evaluated. Any Z-values contributed by surface constraint features referenced by the LAS dataset will be ignored.

  • This tool adds several fields to the attribute table of the input features. If the fields already exist, their values will be overwritten. The values in the updated fields will reflect the indicated statistics about LAS points that overlap the input feature:

    • Z_MIN—The lowest Z-value.
    • Z_MAX—The highest Z-value.
    • Z_MEAN—The average Z-value.
    • POINT_COUNT—The tally of LAS points that were evaluated.
    • STD_DEV—The standard deviation of Z-values.

Parameters

LabelExplanationData Type
Input LAS Dataset

The LAS dataset to process.

LAS Dataset Layer
Input Polygons

The polygon that defines the area for which statistics will be reported.

Feature Layer
Output Property

The properties that will be calculated.

  • Minimum Z —The lowest Z value of LAS points overlapping the feature.
  • Maximum Z —The highest Z value of LAS points overlapping the feature.
  • Average Z —The average Z value of LAS points overlapping the feature.
  • LAS Point Count —The tally of LAS points that were evaluated.
  • Standard Deviation —The standard deviation of Z values.
String

Derived Output

LabelExplanationData Type
Updated Input Polygons

The updated input polygon features.

Feature Class

Environments

Licensing information

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

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