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ENVIBuildTimeSeriesTask

ENVIBuildTimeSeriesTask

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 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:

AddParameter

Execute

Parameter

ParameterNames

RemoveParameter

Properties


This task inherits the following properties from ENVITask:

COMMUTE_ON_DOWNSAMPLE

COMMUTE_ON_SUBSET

DESCRIPTION

DISPLAY_NAME

NAME

REVISION

TAGS

This task also contains the following properties:

INPUT_RASTERS (required)

Specify an array of rasters from which to build the time series.

OUTPUT_RASTERSERIES

This is a reference to the output time-series file (.series) in JSON format.

OUTPUT_RASTERSERIES_URI (optional)

Specify a string with the fully qualified filename and path of the output time-series file.

Version History


ENVI 5.2

Introduced

ENVI 5.5 Replaced INPUT_RASTER_URI with INPUT_RASTERS

API Version


3.3

See Also


ENVITask, ENVITask::Parameter, ENVISubsetRaster



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