LAS Dataset properties (arcpy)

Zusammenfassung

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

A LAS Dataset returns a dataType of "LasDataset".

Eigenschaften

Eigenschaft	Erläuterung	Datentyp
constraintCount (Schreibgeschützt)	The number of surface constraint features referenced by the LAS dataset.	Long
fileCount (Schreibgeschützt)	The number of LAS files referenced by the LAS dataset.	Long
hasStatistics (Schreibgeschützt)	Indicates if statistics had been calculated for the LAS files referenced by the LAS dataset.	Boolean
needsUpdateStatistics (Schreibgeschützt)	Indicates if statistics are out-of-date or had not been calculated. Returns false if statistics are up-to-date.	Boolean
pointCount (Schreibgeschützt)	The number of data points in the LAS files referenced by the LAS dataset.	Long
usesRelativePath (Schreibgeschützt)	Indicates if the LAS dataset references its data elements using relative paths.	Boolean

Codebeispiel

LAS Dataset properties example (stand-alone script)

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        statistics = 'Out-of-date'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)