BuildTimeSeries Task

This task sorts a series of ENVIRasters by acquisition time and builds an ENVI raster series file. Each input raster must have an acquisition time field defined in its header.

Example

; 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('BuildTimeSeries')

; 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('BuildTimeSeries')

Input parameters (Set, Get): INPUT_RASTERS, OUTPUT_RASTERSERIES_URI

Output parameters (Get only): OUTPUT_RASTERSERIES

Parameters marked as "Set" are those that you can set to specific values. You can also retrieve their current values any time. Parameters marked as "Get" are those whose values you can retrieve but not set.