[GRASS-user] r.in.xyz

[Nikos Alexandris]

On Tue, 2008-03-18 at 23:18 -0700, Hamish wrote:
> Glynn:
> > If you have a "sparse" set of points, import them as a vector map then
> > use v.surf.rst. I'm not sure if r.fillnulls[1] handles sparse maps
> > (islands of individual cells), or whether it's limited to filling
> > small "holes" in mostly-filled maps.
> > 
> > [1] r.fillnulls is a script which uses v.surf.rst for the
> > interpolation.
> 
> 
> r.fillnulls is intended to to fill small "holes" in mostly-filled maps.
> It creates points from a few cell buffer around each hole then
> interpolates across the gap.

It's clear now. I think a bit more reading before posting doesn't hurt.
> 
> 
> The r.in.xyz help page has some tips on making a surface from input
> points. For less than a million or three input points v.in.ascii +
> v.surf.rst is probably the better way, unless you want to use r.in.xyz as
> a statistical noise filter.

Any infomation somewhere about "filtering" noise with r.in.xyz?
> 
> r.surf.* modules could work too, to various levels of worseness versus
> what v.surf.rst can do.
> 
> 
> Hamish
> 
> 
> 
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