FeatureAssistantStartServer Task

This task starts the Feature Assistant server.

Example

This example uses the qb_boulder_msi raster in the INSTALL_DIR\ENVIxx\data folder.

; Start the application

e = ENVI()

; Open a file

filename  = FILEPATH('qb_boulder_msi', $

  ROOT_DIR=e.ROOT_DIR, SUBDIRECTORY = ['data'])

Raster = e.openraster(filename)

; Open another file

Filename2 = Filepath('Avon.dat', $

ROOT_DIR=e.ROOT_DIR, $

SUBDIRECTORY = ['data'])

Raster2 = e.OpenRaster(Filename2)

; Start the Feature Assistant server

Task = ENVITask('FeatureAssistantStartServer')

Task.Execute

; Make sure the server started

if (~Task.SERVER_STARTED) then begin

print, 'Server is not started'

endif

; Run multiple classification using the same server

; Get the task from the catalog of ENVI tasks

Task2 = ENVITask('FeatureAssistantClassification')

; Select task inputs

Task2.Input_Raster = Raster1

Task2.Input_Prompt = ['water']

Task2.Resolution = 2.8 ; Meters

Task2.Score_Threshold = 0.5

Task2.Max_Width = 800

Task2.Max_Height = 800

; Set task output

Task2.Output_Vector_URI = e.GetTemporaryFilename('.shp', /CLEANUP_ON_EXIT)

; Execute the task

Task2.Execute

; Get the output vector

OutputVector1 = Task2.Output_Vector

; Get the task from the catalog of ENVI tasks

Task3 = ENVITask('FeatureAssistantClassification')

; Select task inputs

Task3.Input_Raster = Raster2

Task3.Input_Prompt = ['building']

Task3.Zoom_Factor = .75 ; 100% 1:1

Task3.Score_Threshold = 0.42

Task3.Max_Width = 400

Task3.Max_Height = 400

; Set task output

Task3.Output_Vector_URI = e.GetTemporaryFilename('.shp', /CLEANUP_ON_EXIT)

; Execute the task

Task3.Execute

; Get the output vector

OutputVector2 = Task3.Output_Vector

; Stop the Feature Assistant server

Task4 = ENVITask('FeatureAssistantStopServer')

Task4.STOP_SERVER = 1

Task4.Execute

; Display the result

View = e.GetView()

Layer1 = View.CreateLayer(Raster1)

Layer2 = View.CreateLayer(OutputVector1)

View2 = e.CreateView()

Layer3 = View2.CreateLayer(Raster2)

Layer4 = View2.CreateLayer(OutputVector2)

Syntax

Result = ENVITask('FeatureAssistantStartServer')

Input parameters (Set, Get): None

Output parameters (Get only): SERVER_STARTED

Parameters marked as "Set" are those that you can set to specific values. You can also retrieve their current values any time. Parameters marked as "Get" are those whose values you can retrieve but not set.

Output Parameters

SERVER_STARTED

Indicates the Feature Assistant server has been started and is ready for use.

Version History

Feature Assistant 1.0

Introduced