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LAS Dataset properties

Résumé

The Describe function returns the following properties for LAS dataset files. The File and Dataset property groups are also supported.

For an LAS dataset, the Describe dataType property returns a value of "LasDataset".

Propriétés

Propriété Explication Type de données

constraintCount

(Lecture seule)

The number of surface constraint features referenced by the LAS dataset.

Long

fileCount

(Lecture seule)

The number of LAS files referenced by the LAS dataset.

Long

hasStatistics

(Lecture seule)

Specifies whether statistics had been calculated for the LAS files referenced by the LAS dataset.

Boolean

needsUpdateStatistics

(Lecture seule)

Specifies whether statistics are out of date or had not been calculated. Returns false if statistics are up to date.

Boolean

pointCount

(Lecture seule)

The number of data points in the LAS files referenced by the LAS dataset.

Long

usesRelativePath

(Lecture seule)

Specifies whether the LAS dataset references its data elements using relative paths.

Boolean

Exemple de code

LAS dataset properties example

The following script demonstrates the application of LAS dataset properties:

import arcpy

desc = arcpy.Describe(r'E:\GIS_Data\lidar\test_bmore.lasd')

if desc.usesRelativePath:
    pathType = 'Relative'
else: pathType = 'Absolute'

# Determine state of statistics
if desc.needsUpdateStatistics:
    if desc.hasStatistics:
        statistics = 'Out-of-date'
    else:
        statistics = 'Missing'
else:
    statistics = 'Current'

print('LAS Dataset Name: {0} \r'\
      'Point Count: {1} \r'\
      'Surface Constraint Count: {2} \r'\
      'Path Type: {3} \r'\
      'Statistics Status: {4}'.format(desc.basename, desc.pointCount,
                                      desc.constraintCount, pathType,
                                      statistics))