[GRASS-user] Raster Map subset

[stephen sefick]

I am aware of r.topmodel in GRASS, but I am much more familiar with R
than GRASS, and the GRASS documentation is not as comprehensible as
that for R -- This is just because of my own bias and does not reflect
on anybody but me.  I would love to try it in GRASS but I think I need
a tutorial.  Any help would be greatly appreciated with this.

Stephen

On Fri, Feb 5, 2010 at 6:36 PM, Rich Shepard <rshepard at appl-ecosys.com> wrote:
> On Fri, 5 Feb 2010, stephen sefick wrote:
>
>> Is there a way to get a subset of a larger raster map.  I have zoomed
>> into an area and would like to make a raster map only containing that
>> area. Can I do this? I am going to use this as input into R for some
>> topmodel runs.
>
> Stephen,
>
>  Yes, you can. This subject has come up several times in the past month or
> so so the archives have a lot of options for you. One to look at closely is
> v.in.region. After zooming to the area you want, run v.in.region and save
> that vector map. You can then use it with the g.region command to limit the
> displayed bounds of your raster map. You can use r.patch to make a new
> raster map that's the size of the newly created vector map.
>
>  Are you aware of r.topmodel within GRASS?
>
> Rich
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-- 
Stephen Sefick

Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods.  We are mammals, and have not exhausted the
annoying little problems of being mammals.

								-K. Mullis