[GRASS-user] How to perform Layer reduction for hyperspectral image cube?
nik at nikosalexandris.net
Thu May 23 04:00:32 PDT 2013
Asefa Areda wrote:
> Dear All:
> I want to reduce layers from NOVASOL hyperspectral image cube which has 140
> 1) How can I perform layer reduction
I have no experience with Hyperspectral imagery. But PCA should be a valuable
option to consider. Have a look at the manual
and some examples in a GRASS-Wiki page
> 2) If I want use* i.atcorr *should I process only a single layer at a time?
You "can" only process one layer per run.
> 3) if 2) is not how do I process all the layers in one go (the txt? 4) Is
> there any means to include a new sensor outside what is lited in the
> ''predefined sensor'' e.g., 64: 4th band of ETM+ Landsat 7
a) You need to script it in order to get it run for multiple "layers" in one
go. If you work under Linux, I can send you a Bash shell linux script (off-
list) I have used to run i.atcorr for some Landsat scenes. It'll sure need
some hand-crafting as there are some hardcoded stuff.
Maybe some-one has already a "clean" solution on that.
b) For "adding new band filters", have a look at:
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