RasterProperties Task

This task retrieves the properties of an ENVIRaster. Although you can issue a PRINT command on an ENVIRaster to retrieve its properties, this task was designed for use within an image-processing script where you can create variables for the different properties.

Example

; Start the application

e = ENVI(/HEADLESS)

; Open an input file

File = Filepath('qb_boulder_msi', Subdir=['data'], $

Root_Dir=e.Root_Dir)

Raster = e.OpenRaster(File)

; Get the task from the catalog of ENVITasks

Task = ENVITask('RasterProperties')

; Define inputs

Task.INPUT_RASTER = Raster

; Run the task

Task.Execute

; Get outputs

dataTypeName = Task.DATA_TYPE_NAME

dataTypeCode = Task.DATA_TYPE_CODE

nBands = Task.NBANDS

nColumns = Task.NCOLUMNS

nRows = Task.NROWS

spatialRef = Task.SPATIAL_REFERENCE

; Print the values to the IDL console

Print, dataTypeName

Print, dataTypeCode

Print nBands

Print, nColumns

Print, nRows

Print, spatialRef

Syntax

Result = ENVITask('RasterProperties')

Input properties (Set, Get): INPUT_RASTER

Output properties (Get only): DATA_TYPE_CODE, DATA_TYPE_NAME, NBANDS, NCOLUMNS, NROWS, SPATIAL_REFERENCE

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.