[GRASS-user] fill gaps

[Markus Metz]

Martin Landa wrote:
> Hi all,
>
> I am doing some post-classification smoothing. First areas lesser than
> 1ha are removed using `r.reclass.area` and then gaps (NULL cells)
> filled using `r.filldir`. My region
>
> rows:       977
> cols:       1227
> cells:      1198779
>
> number of NULL cells to be filled
>
> total null and non-null cells: 1198779
> total null cells: 120560
>
> Unfortunately `r.filldir` is taking ages in GRASS 6. Is there other
> quicker way how to fill gaps (in GRASS 6)?
>

For categorical data you could use r.grow.distance in=mymap
value=mymap_filled which assigns the nearest non-NULL value to a NULL
cell and is pretty fast.

Markus M

> Thanks in advance, Martin
>
> --
> Martin Landa <landa.martin gmail.com> * http://geo.fsv.cvut.cz/~landa
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