BuildRasterSeries Task
This task builds an ENVI raster series file for spatiotemporal analysis.
Example
This example builds a raster series file from sample NCEP Reanalysis-II data included with your installation of ENVI. See More Examples for other code examples.
; Start the application
e = ENVI()
TimeSeriesDir = Filepath('', Subdir=['data','time_series'], $
Root_Dir = e.Root_Dir)
files = File_Search(TimeSeriesDir, 'AirTemp*.dat')
numRasters = N_Elements(files)
rasters = ObjArr(numRasters)
FOR i=0, (numRasters-1) DO $
rasters[i] = e.OpenRaster(files[i])
; Get the task from the catalog of ENVITasks
Task = ENVITask('BuildRasterSeries')
; Define inputs
Task.INPUT_RASTERS = rasters
; Run the task
Task.Execute
; Print the contents of the series file
SeriesFile = Task.OUTPUT_RASTERSERIES
SeriesFile
IDL prints:
Description: Raster Series 2014-04-10T16-45-53Z
Data Type: 5
Version: 5.1.1
Total Number of files: 12
Regular Grid: true
0: 2012-12-29T00:00:00Z: ...\AirTemp_2012122900.dat
1: 2012-12-29T06:00:00Z: ...\AirTemp_2012122906.dat
2: 2012-12-29T12:00:00Z: ...\AirTemp_2012122912.dat
3: 2012-12-29T18:00:00Z: ...\AirTemp_2012122918.dat
4: 2012-12-30T00:00:00Z: ...\AirTemp_2012123000.dat
5: 2012-12-30T06:00:00Z: ...\AirTemp_2012123006.dat
6: 2012-12-30T12:00:00Z: ...\AirTemp_2012123012.dat
7: 2012-12-30T18:00:00Z: ...\AirTemp_2012123018.dat
8: 2012-12-31T00:00:00Z: ...\AirTemp_2012123100.dat
9: 2012-12-31T06:00:00Z: ...\AirTemp_2012123106.dat
10: 2012-12-31T12:00:00Z: ...\AirTemp_2012123112.dat
11: 2012-12-31T18:00:00Z: ...\AirTemp_2012123118.dat
Syntax
Result = ENVITask('BuildRasterSeries')
Input properties (Set, Get): INPUT_RASTERS, OUTPUT_RASTERSERIES_URI
Output properties (Get only): OUTPUT_RASTERSERIES
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:
Properties
This task inherits the following properties from ENVITask:
This task also contains the following properties:
INPUT_RASTERS (required)
Specify an array of rasters from which to build the ENVI raster series.
OUTPUT_RASTERSERIES
This is a reference to the output raster series file (.series) in JSON format.
OUTPUT_RASTERSERIES_URI (optional)
Specify a string with the fully qualified filename and path of the output raster series file.
More Examples
Build a Raster Series from Multi-Segment NITF Data
This code sample shows how to open NITF files with multiple image segments, then build a raster series from those image segments. This is a hypothetical example; it does not use a specific file for illustration:
Task = ENVITask('BuildRasterSeries')
File1 = 'MultiFile1.ntf'
Raster1 = e.OpenRaster(File1)
File2 = 'MultiFile2.ntf'
Raster2 = e.OpenRaster(File2)
Task.INPUT_RASTERS = [Raster1, Raster2]
Task.OUPUT_RASTERSERIES_URI = e.GetTemporaryFilename('series')
Task.Execute
Build a Raster Series from HDF5 Data
This code sample shows how to to open specific datasets within an HDF5 file, then build a raster series from those image segments. This is a hypothetical example; it does not use a specific file for illustration.
Tip: You can use the IDL H5_LIST routine to get a list of dataset names in an HDF5 file.
Task = ENVITask('BuildRasterSeries')
File = 'C:\Data\ProbaV\S1TOAFile.h5'
Raster1 = e.OpenRaster(File, DATASET_NAME='/LEVEL3/RADIOMETRY/BLUE/TOA')
Raster2 = e.OpenRaster(File, DATASET_NAME='/LEVEL3/RADIOMETRY/NIR/TOA')
Raster3 = e.OpenRaster(File, DATASET_NAME='/LEVEL3/RADIOMETRY/RED/TOA')
Raster4 = e.OpenRaster(File, DATASET_NAME='/LEVEL3/RADIOMETRY/SWIR/TOA')
Task.INPUT_RASTERS = [Raster1, Raster2, Raster3, Raster4]
Task.OUTPUT_RASTERSERIES_URI = e.GetTemporaryFilename('series')
Task.Execute
Version History
|
ENVI 5.2 |
Introduced |
| ENVI 5.5 | Replaced INPUT_RASTER_URI with INPUT_RASTERS |
API Version
4.2