ENVIAgCrops::Export

The Export method saves an ENVIAgCrops object to a JSON-formatted text file.

This method requires a separate license for the ENVI Crop Science Module; contact your sales representative for more information.

Example

This example counts the crops in an image of emerging cotton plants. It creates an ENVIAgCrops object named outCrops and exports it.

; Start the application

e = ENVI(/HEADLESS)

; Open an input file

File = Filepath('Cotton.dat', $

  SUBDIR=['data','crop_science'], $

  ROOT_DIR=e.Root_Dir)

Raster = e.OpenRaster(File)

; Process the green band

subset = ENVISubsetRaster(Raster, BANDS=[1])

; Count the crops and output an ENVIAgCrops object

outCrops = ENVIAgCropCount(subset, 9, 12, $

  GAUSSIAN_FACTOR=0.8, $

  /INCLUDE_EDGES, $

  INTENSITY_THRESHOLD=0.81, $

  NUMBER_OF_INCREMENTS=12, $

  OUTPUT_NCROPS=outputNumCrops, $

  PERCENT_OVERLAP=60)

; Export the crop data to disk

outFile = e.GetTemporaryFilename('json')

outCrops.Export, URI=outFile

Syntax

ENVIAgCrops.Export, URI=value [, ERROR=variable]

Or:

ENVIAgCrops.Export [, ERROR=variable]

Arguments

None

Keywords

ERROR

Set this keyword to a named variable that will contain any error message issued during execution of this routine. If no error occurs, the ERROR variable will be set to a null string (''). If an error occurs and the routine is a function, then the function result will be undefined.

When this keyword is not set and an error occurs, ENVI returns to the caller and execution halts. In this case, the error message is contained within !ERROR_STATE and can be caught using IDL's CATCH routine. See IDL Help for more information on !ERROR_STATE and CATCH.

See Manage Errors for more information on error handling in ENVI programming.

URI

Set this keyword to a fully qualified URI with the path and filename of the exported ENVIAgCrops file (.json). This keyword is required if you did not set the URI property when initializing the ENVIAgCrops object.

Version History

Crop Science 1.0

Introduced