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ENVIPointCloudViewer::DisplayShapefile

ENVIPointCloudViewer::DisplayShapefile

The DisplayShapefile function opens a shapefile in the ENVI LiDAR application. Each time this method is called, the previous shapefile display is replaced with the current. The shapefile must be in WGS84 UTM coordinate space. This method is similar to selecting File > Import > Background Shapefile from the menu in the ENVI LiDAR application.

Note: This method is supported only on Windows.

Example


; Get the ENVIPointCloudViewer application
e = ENVI()
elv = ENVIPointCloudViewer()
 
; Open the las file
file = FILEPATH('DataSample.las', ROOT_DIR=e.ROOT_DIR, $
  SUBDIRECTORY = ['data','lidar'])
pointcloud = e.OpenPointCloud(file, PROJECT_URI='C:\lidar\DataSample')
 
; Display the las file
elv.Display, pointcloud
 
; Create buildings shapefile
task = ENVITask('PointCloudFeatureExtraction')
task.INPUT_POINT_CLOUD = pointcloud
task.BUILDINGS_GENERATE=1
task.Execute
productsInfo = task.OUTPUT_PRODUCTS_INFO
 
; Display the shapefile
elv.DisplayShapefile, productsInfo.BUILDINGS_URI

Syntax


ENVIPointCloudViewer.DisplayShapefile, Filename([, ERROR=variable])

Arguments


Filename

The shapefile to open.

Keywords


ERROR

Set this keyword to a named variable that will contain any error message issued during execution of this routine. If no error occurs, the ERROR variable will be set to a null string (''). If an error occurs and the routine is a function, then the function result will be undefined.

When this keyword is not set and an error occurs, ENVI returns to the caller and execution halts. In this case, the error message is contained within !ERROR_STATE and can be caught using IDL's CATCH routine. See IDL Help for more information on !ERROR_STATE and CATCH.

See Manage Errors for more information on error handling in ENVI programming.

Version History


ENVI 5.3

Introduced

API Version


3.3

See Also


ENVIPointCloud, ENVIPointCloudViewer



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