[GRASS-user] Raster - assign interpolated values into range

[Francois Chartier]

thanks,  i will submit a ticket in trac.

On Tue, Feb 26, 2019, 07:33 Moritz Lennert <mlennert at club.worldonline.be
wrote:

> On 26/02/19 02:23, Francois Chartier wrote:
> > doesnt work with 3d raster. only takes in 2d. i did it with access, more
> > tedious but it works.  i should be able to do this with the attribute
> > table directly but havent tried yet.
>
> A raster doesn't have an attribute table, so this is not a solution.
> r3.mapcalc with nested rules such as this should work:
>
> if(map >=0.01 && map < 0.5, 0.25, if(map < 1, 0.75, if(etc)))
>
> But I do believe that r.reclass and r.recode are fundamental modules
> that should also exist for r3. So, I would suggest filling in an
> enhancement request ticket in trac.
>
> Moritz
>
> >
> > On Mon, Feb 25, 2019, 05:57 Moritz Lennert <mlennert at club.worldonline.be
> > <mailto:mlennert at club.worldonline.be> wrote:
> >
> >     On 23/02/19 23:16, Francois Chartier wrote:
> >      > What about if i dont want constant spacing but at certain ranges?
> >
> >     Have you tried r.recode as Vero suggested ?
> >
> >     Moritz
> >
> >      >
> >      > Le sam. 23 févr. 2019 à 11:00, Veronica Andreo
> >     <veroandreo at gmail.com <mailto:veroandreo at gmail.com>
> >      > <mailto:veroandreo at gmail.com <mailto:veroandreo at gmail.com>>> a
> >     écrit :
> >      >
> >      >
> >      >
> >      >     El sáb., 23 feb. 2019 12:17, Markus Metz
> >      >     <markus.metz.giswork at gmail.com
> >     <mailto:markus.metz.giswork at gmail.com>
> >      >     <mailto:markus.metz.giswork at gmail.com
> >     <mailto:markus.metz.giswork at gmail.com>>> escribió:
> >      >
> >      >
> >      >
> >      >         On Sat, Feb 23, 2019 at 1:45 PM Francois Chartier
> >      >         <fra.chartier at gmail.com <mailto:fra.chartier at gmail.com>
> >     <mailto:fra.chartier at gmail.com <mailto:fra.chartier at gmail.com>>>
> wrote:
> >      >          >
> >      >          > Hi,
> >      >          >
> >      >          > After creating a raster (2 or 3d) is there a way that
> >      >         interpolated values (floats) can be assigned a specific
> value
> >      >         based on range. example: 0.01, 0.2 0.52, 0.67, 0.99,
> values
> >      >         between 0.01 and 0.5 assign 0.25; values between 0.5 and
> 1,
> >      >         assign 0.75.
> >      >
> >      >         if you want to assign values to 0.25, 0.75, 1.25, 1.75,
> etc.,
> >      >         i.e. new values with a constant spacing of 0.5, you can
> use
> >      >
> >      >         r.mapcalc "output = round(input, 0.5, 0.25)"
> >      >
> >      >
> >      >     Ah! So cool!! 8)
> >      >
> >      >
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> >      >
> >
> >
>
>
>
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