[GRASS-user] i.vi (ndvi and sentinel)

[Veronica Andreo]

ops! I forgot the list :)

---------- Forwarded message ----------
From: Veronica Andreo <veroandreo at gmail.com>
Date: 2017-10-14 13:50 GMT+02:00
Subject: Re: [GRASS-user] i.vi (ndvi and sentinel)
To: Martin Landa <landa.martin at gmail.com>

Hi Martin,

NDVI for Sentinel 2 is estimated as described in the links you provided,
i.e. band 8 (NIR) and 4 (RED). It would be possible to use band 8A (narrow
IR) but resampling would be needed since B8A has 20m resolution.

HTH,
Vero

2017-10-14 12:36 GMT+02:00 Martin Landa <landa.martin at gmail.com>:

> Hi,
>
> i.vi manual [1] shows how to compute NDVI from Sentinel-2:
>
> """
> Satellite specific band numbers ([NIR, Red]):
> ...
>   Sentinel-2 Bands = [ 5,  4]
> """
>
> But [1] speaks about 4th and 8th band. Is it a bug in i.vi manual?
> Thanks for clarification. Martin
>
> [1] https://grass.osgeo.org/grass72/manuals/i.vi.html#vegetation-indices
> [2] https://sentinel.esa.int/web/sentinel/technical-guides/senti
> nel-2-msi/level-2a/algorithm
>
> --
> Martin Landa
> http://geo.fsv.cvut.cz/gwiki/Landa
> http://gismentors.cz/mentors/landa
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