QuerySpectralLibrary Task

This task queries a spectral library, returning the names of all spectra in the library.

Example

; Start the application

e = ENVI(/HEADLESS)

; Open a spectral library from the distribution

specLibFile = FILEPATH('veg_2grn.sli', ROOT_DIR=e.ROOT_DIR, $

SUBDIR=['resource', 'speclib', 'veg_lib'])

specLib = ENVISpectralLibrary(specLibFile)

; Get the task from the catalog of ENVITasks

Task = ENVITask('QuerySpectralLibrary')

; Define inputs

Task.INPUT_SPECTRAL_LIBRARY = specLib

; Run the task

Task.Execute

; Print the first spectrum name

PRINT, Task.SPECTRA_NAMES[0]

IDL prints:

Arroyo Willow

Syntax

Result = ENVITask('QuerySpectralLibrary')

Input properties (Set, Get): INPUT_SPECTRAL_LIBRARY

Output properties (Get only): SPECTRA_NAMES

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

Methods

This task inherits the following methods from ENVITask:

Properties

This task inherits the following properties from ENVITask:

COMMUTE_ON_DOWNSAMPLE

INPUT_SPECTRAL_LIBRARY (required)

Specify a spectral library from which to retrieve spectra names.

SPECTRA_NAMES

A string array containing all spectra names for the input spectral library.

Version History

ENVI 5.3

Introduced

API Version

4.2