LAS vers multipoints (3D Analyst)

Récapitulatif

This tool imports one or more files in LAS format, the industry standard for lidar data, into a new multipoint feature class. Supported LAS file format versions are 1.0, 1.1, and 1.2.

Utilisation

Syntaxe

LASToMultipoint_3d (input, out_feature_class, average_point_spacing, {class_code}, {return}, {attribute}, {input_coordinate_system}, {file_suffix}, {z_factor})
ParamètreExplicationType de données
input

One or more files or folders with data in the LAS version 1.0, 1.1, and 1.2 format. The LAS format is the industry standard for lidar data.

Folder; File
out_feature_class

The newly created multipoint feature class to which lidar points are added.

Feature Class
average_point_spacing

The average 2D distance between points in the input file or files. This can be an approximation. If areas have been sampled at different densities, specify the smaller spacing. The value needs to be provided in the projection units of the output coordinate system.

Double
class_code
(Facultatif)

Numeric classification codes to use as a query filter. The default is no filter.

Long
return
(Facultatif)

The return values used as a query filter. Valid return values are 1-5, LAST_RETURNS, and ANY_RETURNS. The default is ANY_RETURNS.

String
attribute
(Facultatif)

One or more LAS attributes to load and store and optionally the field names to use. The default is none. Supported attribute keywords are INTENSITY, RETURN_NUMBER, NUMBER_OF_RETURNS, SCAN_DIRECTION_FLAG, EDGE_OF_FLIGHTLINE, CLASSIFICATION, SCAN_ANGLE_RANK, FILE_MARKER, USER_BIT_FIELD, and GPS_TIME.

String
input_coordinate_system
(Facultatif)

The coordinate system of the input LAS file. This defaults to that specified in the LAS file. If for some reason it's not defined in the file but you know what it is, provide it here.

Coordinate system
file_suffix
(Facultatif)

The suffix of the files to import when a folder is specified on input.

String
z_factor
(Facultatif)

Specifies a factor by which to multiply the surface heights. Used to convert z units to x and y units.

Double

Exemple de code

1er exemple d'utilisation de l'outil LAS vers multipoints (fenêtre Python)

Le script de fenêtre Python ci-dessous illustre l'utilisation de la fonction LAS vers multipoints en mode immédiat.

import arcpy
from arcpy import env

arcpy.CheckOutExtension("3D")
env.workspace = "C:/data"
arcpy.LASToMultipoint_3d("001.las", "Test.gdb/feature_dataset/sample_1", 1.5, 
                        "2", "ANY_RETURNS", "INTENSITY", "Coordinate Systems"\
                        "/Projected Coordinate Systems/UTM/NAD 1983/NAD 1983 "\
                        "UTM Zone 17N.prj", "las", 1)
2e exemple d'utilisation de l'outil LAS vers multipoints (script autonome)

Le script Python ci-dessous illustre l'utilisation de la fonction LAS vers multipoints dans un script autonome. 

'''****************************************************************************
Name: Define Data Boundary of LAS File
Description: This script demonstrates how to delineate data boundaries of 
             LAS files with irregularly clustered points. It is intended for 
             use as a script tool with one input LAS file.
****************************************************************************'''
# Import system modules
import arcpy
import exceptions, sys, traceback

# Set local variables
inLas = arcpy.GetParameterAsText(0) #input LAS file
ptSpacing = arcpy.GetParameterAsText(1) # LAS point spacing
classCode = arcpy.GetParameterAsText(2) # List of integers
returnValue = arcpy.GetParameterAsText(3) # List of strings
outTin = arcpy.GetParameterAsText(4) # TIN created to delineate data area
outBoundary = arcpy.GetParameterAsText(5) # Polygon boundary file

try:
    arcpy.CheckOutExtension("3D")
    # Execute LASToMultipoint
    arcpy.AddMessage("Creating multipoint features from LAS...")
    lasMP = arcpy.CreateUniqueName('lasMultipoint', 'in_memory')
    arcpy.ddd.LASToMultipoint(inLas, LasMP, ptSpacing, class_code, 
                             "ANY_RETURNS", "", sr, inFormat, zfactor)
    # Execute CreateTin
    arcpy.AddMessage("Creating TIN dataset...")
    arcpy.ddd.CreateTin(outTin, sr, "{0} Shape.Z masspoints"\
                       .format(lasMP), "Delaunay")
    # Execute CopyTin
    arcpy.AddMessage("Copying TIN to delineate data boundary...")
    arcpy.ddd.CopyTin(outTin, "{0}_copy".format(outTin))
    # Execute DelineateTinDataArea
    arcpy.AddMessage("Delineating TIN boundary...")
    maxEdge = ptSpacing * 4
    arcpy.ddd.DelineateTinDataArea(outTin, maxEdge, "PERIMETER_ONLY")
    # Execute TinDomain
    arcpy.AddMessage("Exporting data area to polygon boundary...")
    arcpy.ddd.TinDomain(outTin, outBoundary, "POLYGON")
    arcpy.AddMessage("Finished")
    arcpy.CheckInExtension("3D")
        
except arcpy.ExecuteError:
    print arcpy.GetMessages()
except:
    # Get the traceback object
    tb = sys.exc_info()[2]
    tbinfo = traceback.format_tb(tb)[0]
    # Concatenate error information into message string
    pymsg = 'PYTHON ERRORS:\nTraceback info:\n{0}\nError Info:\n{1}'\
          .format(tbinfo, str(sys.exc_info()[1]))
    msgs = 'ArcPy ERRORS:\n {0}\n'.format(arcpy.GetMessages(2))
    # Return python error messages for script tool or Python Window
    arcpy.AddError(pymsg)
    arcpy.AddError(msgs)

Environnements

Rubriques connexes

ASCII 3D vers classe d'entités
Classe d'entités Z vers fichier ASCII
Couche 3D vers classe d'entités
Informations du fichier de points
Raster vers multi-points
MNT vers points

Informations de licence

ArcView : Obligatoire 3D Analyst
ArcEditor : Obligatoire 3D Analyst
ArcInfo : Obligatoire 3D Analyst

Copyright © 1995-2012 Esri. Tous droits réservés.
7/10/2012