Welcome to the Harris Geospatial documentation center. Here you will find reference guides and help documents.


  >  Docs Center  >  ENVI API  >  Processing  >  ENVIQuerySpectralLibraryTask

ENVIQuerySpectralLibraryTask

ENVIQuerySpectralLibraryTask

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:

AddParameter

Execute

Parameter

ParameterNames

RemoveParameter

Properties


This task inherits the following properties from ENVITask:

COMMUTE_ON_DOWNSAMPLE

COMMUTE_ON_SUBSET

DESCRIPTION

DISPLAY_NAME

NAME

REVISION

TAGS

This task also contains the following properties:

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


3.3

See Also


ENVITask, ENVITask::Parameter, ENVISpectralLibrary, ENVIResampleSpectrumTask, ENVIGetSpectrumFromLibraryTask



© 2019 Harris Geospatial Solutions, Inc. |  Legal
My Account    |    Store    |    Contact Us