ForestCoverClassification Task

This task performs raster classification based on Forest Cover Index.

For additional details on forest cover classification, see Forest Cover Classification.

Example

; Start the application

e = ENVI()

; Open an input file

File = FILEPATH('AVIRISReflectanceSubset.dat', $

  SUBDIRECTORY=['data', 'hyperspectral'], $

  ROOT_DIR=e.ROOT_DIR)

Raster = e.OpenRaster(File)

; Get the task from the catalog of ENVITasks

Task = ENVITask('ForestCoverClassification')

; Define the input raster

Task.INPUT_RASTER = Raster

; Run the task

Task.Execute

; Get the collection of data objects currently available in the Data Manager

DataColl = e.Data

; Add the output to the Data Manager

DataColl.Add, Task.OUTPUT_RASTER

; Display the result

View = e.GetView()

Layer = View.CreateLayer(Task.OUTPUT_RASTER)

Syntax

Result = ENVITask('ForestCoverClassification')

Input parameters (Set, Get): CLASS_COLOR, DO_CLUMP, DO_SIEVE, FCI_THRESH, INPUT_RASTER, NDVI_MIN, OUTPUT_URI, USE_NDVI

Output parameters (Get only): OUTPUT_RASTER

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.

Input Parameters

CLASS_COLOR (optional)

Specify the RGB triplet of the output forest class. The default value is [0,127,0] (green).

DO_CLUMP (optional)

Specify whether to perform clumping on the classification image. The default value is 1.

DO_SIEVE (optional)

Specify whether to apply sieving to the classification image. The default value is 1.

FCI_THRESH (optional)

Specify the maximum forest cover index (FCI) value to use for thresholding. The FCI value must be between 0 and 1. The default value is 0.1.

INPUT_RASTER (required)

Specify a multispectral or hyperspectral reflectance raster to perform forest cover classification. The raster must contain wavelengths and a Red and either a Red Edge or NIR band.

NDVI_MIN (optional)

Specify the minimum NDVI value that will be used to threshold the output if the USE_NDVI parameter is set. The value must be between -1 and 1. The default value is 0.4.

OUTPUT_URI (optional)

Specify a string with the fully qualified filename and path of the associated OUTPUT_RASTER. If you do not specify this parameter, or set it to an exclamation symbol (!), a temporary file will be created.