[GRASS-user] V.generalize

[Markus Neteler]

Hi,

On Mon, Aug 24, 2020 at 4:35 PM DAZIN Fabrice (SIRS)
<Fabrice.DAZIN at sirs-fr.com> wrote:
>
>
> Dear all,
>
> In the process of transforming a raster classification into a vector layer, I use among others the command V.GENERALIZE.
>
> v.generalize input=v_classif_ext at PERMANENT layer=1 type=area type=boundary  method=reduction threshold=4 alpha=0.5 iterations=4 output=v_classif_ext_redv.generalize input=v_classif_ext_red at PERMANENT layer=1 type=area type=boundary method=sliding_averaging threshold=100 alpha=0.5 iterations=4 output=v_smooth_1
>
> with
> grassversion=79
> srid=2154
>
> And I wonder why the smoothing result is not homogeneous, even sometimes for the same polygon.
> Any idea about the reason?

Not sure about this particular "reduction" method but did you already
try with a different method?

Best regards,
Markus

-- 
Markus Neteler, PhD
https://www.mundialis.de - free data with free software
https://grass.osgeo.org
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