[GRASS-user] [DWE]- Landsat Cloud detection with GRASS

[maning sambale]

2010/9/29 Markus Neteler <neteler at osgeo.org>:
> 2010/9/28 António Rocha <antonio.rocha at deimos.com.pt>:
>> Greetings
>>
>> I'm trying to find if GRASS includes some-sort of way to detect/eliminatd
>> cloud cover and shadows from LANDSAT Images.
>> The only thing I found was this:
>> http://svn.osgeo.org/grass/grass-addons/imagery/i.landsat.acca/description.html
>> But:
>> 1- has anyone tried/used this? Is this useful and working?

Yes, I've used it in the past using 6.3 svn.  I highly recommend it.
You need to convert your Landsat data to top-of-atmosphere radiance or
top-of-atmosphere reflectance first before running i.landsat.acca:
http://grass.osgeo.org/wiki/GRASS_AddOns#i.landsat.toar

Off-topic:  I hope the landsat tools (i.topo.corr, i.landsat.toar,
i.landsat.acca, i.landsat.dehaze, i.attcorr) gets into the core in the
future.


> It is currently under active development. Useful - hope so :)
>
>> 2- can I use it to detect-and-eliminate clouds?
>
> Should be the idea. The best way is to contact the author who
> is very responsive (see manual page).
>
> Cheers
> Markus
>
>> Thanks
>> Antonio
>>
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-- 
cheers,
maning
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