[GRASS-user] srtm - r.fillnuls

[Markus Metz]

On Fri, Nov 22, 2013 at 3:05 PM, Martin Landa <landa.martin at gmail.com> wrote:
> Hi,
>
> when playing with SRTM data I found out that `r.fill.nulls`'s RST
> method usually fails [1] -- compared to `method=cubic` (cubic spline
> interpolation) [2]. Is it expectable?
>
> Wouldn't be better to change default method to 'cubic' (v.surf.spline
> is quite slow anyway)?

Or alternatively, use gap-filled SRTM v3 provided by NASA [0].

Markus M

[0] https://lpdaac.usgs.gov/products/measures_products_table/srtmgl3

>
> Thanks, Martin
>
> [1] http://geo.fsv.cvut.cz/WIKI/freegis/images/d/d3/Srtm-fill-nulls-failed.png
> [2] http://geo.fsv.cvut.cz/WIKI/freegis/images/8/83/Srtm-fill-nulls-cubic.png
>
> --
> Martin Landa <landa.martin gmail.com> * http://geo.fsv.cvut.cz/~landa
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