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


Harris Geospatial / Docs Center / ENVI API / Crop Science / ENVIAgCrops::Export

ENVIAgCrops::Export

ENVIAgCrops::Export

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

This method is part of ENVI Crop Science, which requires a separate license and installation.

Example


This example counts the crops in a spectral index image of a citrus orchard. It creates an ENVIAgCrops object named outCrops and exports it.

; Start the application
e = ENVI(/HEADLESS)
 
; Open an input file
File = Filepath('CitrusOrthophoto.dat', $
  Subdir=['data','crop_science'], $
  Root_Dir=e.Root_Dir)
Raster = e.OpenRaster(File)
 
; Preprocess the image so that crops are bright.
MTVIImage = ENVISpectralIndexRaster(Raster, 'MTVI')
 
; Count the crops and output an ENVIAgCrops object
outCrops = ENVIAgCropCount(MTVIImage, 2.0, 5.0, $
  GAUSSIAN_FACTOR = 0, $
  /INCLUDE_EDGES, $
  INTENSITY_THRESHOLD = 0.8, $
  NUMBER_OF_INCREMENTS = 4, $
  PERCENT_OVERLAP = 100.0)
 
; Export the crop data to disk
outFile = e.GetTemporaryFilename('json')
outCrops.Export, URI=outFile

Syntax


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

Or:

ENVIAgCrops.Export [, Keywords=value]

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 the Manage Errors topic in ENVI Help for more information on error handling.

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


1.0

Introduced

See Also


ENVIAgCrops



© 2017 Exelis Visual Information Solutions, Inc. |  Legal
My Account    |    Buy    |    Contact Us