LAS Dataset properties

Resumen

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".

Propiedades

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needsUpdateStatistics (Sólo lectura)	Indicates if statistics are out-of-date or had not been calculated.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

Muestra de código

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        statistics = 'Out-of-date'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)