ENVIDataCollection

This is a reference to an ENVIDataCollection object, which is a collection of data objects currently available in the Data Manager.

The advantage of adding an object (dataset) to the Data Manager is that it will persist throughout the ENVI session. If you close ENVI, the Data Manager closes the relevant files and cleans up object references. Also, if you have a script that runs an interactive session of ENVI (but does not close it), the object will be available for use even after the script ends.

The following always add to the Data Manager:

Rasters returned by ENVI::OpenRaster
Raster Series returned by ENVIRasterSeries
Vectors returned by ENVI::OpenVector

The following objects do not add to the Data Manager. You can add them if needed by using the ENVIDataCollection::Add method.

Rasters returned by ENVISubsetRaster
Processing output generated from ENVITasks

Use the Data property of the ENVI function to create an ENVIDataCollection object:

Result = e.Data

Example

; Start the application

e = ENVI()

; Open a raster file

File = Filepath('qb_boulder_msi', Root_Dir=e.Root_Dir, $

Subdir = ['data'])

Raster = e.OpenRaster(File)

; Open a vector file

Vect = Filepath('qb_boulder_msi_vectors.shp', $

Root_Dir=e.Root_Dir, Subdir = ['data'])

Vector = e.OpenVector(Vect)

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

DataColl = e.Data

; Retrieve the contents of the data collection

DataItems = DataColl.Get()

FOREACH Item, DataItems DO PRINT, Item

Methods

Properties

None

Version History

ENVI 5.1

Introduced

API Version