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Re: Multi-band sampling strategy [message #72174 is a reply to message #72173]

Wed, 18 August 2010 10:26

JessW
Messages: 5
Registered: August 2010

Junior Member

Hi Max,

Thanks for responding, and sorry about the fuzzy description of what
I'm doing. Let me try to clarify.

I am tracking the reflectance change of particular pixels across a
time-series of Landsat data. So for my current stack of 8 Landsat
scenes spanning April - October, the program returns 8 reflectance
values for a given pixel address x,y. ENVI_GET_SLICE seemed ideal for
this task because it can sample a single pixel location through a
number of bands; however, as I mentioned, it is very slow when it
loops over a large number of pixels to sample.

ENVI_GET_DATA appears to work on only one band, so it doesn't seem
quite as suitable for what I'm trying to do. I'll have to investigate
the use of ENVI_CREATE_ROI; thanks for that suggestion.

Jess

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[Message index]

		Re: Multi-band sampling strategy By: Maxwell Peck on Wed, 18 August 2010 14:11
		Re: Multi-band sampling strategy By: JessW on Wed, 18 August 2010 13:58
		Re: Multi-band sampling strategy By: wita on Wed, 18 August 2010 12:46
		Re: Multi-band sampling strategy By: penteado on Wed, 18 August 2010 11:09
		Re: Multi-band sampling strategy By: JessW on Wed, 18 August 2010 10:26
		Re: Multi-band sampling strategy By: Maxwell Peck on Tue, 17 August 2010 23:35
		Re: Multi-band sampling strategy By: JessW on Wed, 25 August 2010 11:13
		Re: Multi-band sampling strategy By: wita on Tue, 31 August 2010 02:08

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