[GRASS-user] EVI algorithm

Markus Neteler neteler at osgeo.org
Wed Jul 4 01:01:11 PDT 2012


On Wed, Jul 4, 2012 at 8:26 AM, Danut Mihon <danut_mihon at yahoo.com> wrote:
> Hi,
>
> I am trying to implement the EVI algorithm, using r.mapcalc. But I do not
> know how to deal with the result, because its values exceeds the [-1, 1]
> interval. Do you know if there is the need to bring all the values within
> this interval (meaning that values < -1 will be equaled to -1, and values >
> 1 will be assigned to 1)?
> Or maybe you could guide me to another approach for the EVI algorithm.

Danut,

please post your formula (r.mapcalc string) - perhaps we can spot the problem.

Markus


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