Thanks, Markus for all the info. This should point
me into the right direction to get a grip on my
troubles.
I will try again and document my experiences
when I get back from my holidays.
Cheers,
Benjamin
----- Originalnachricht -----
Von: Markus Neteler <neteler@itc.it>
Datum: Freitag, 1. Juli 2005 5:38 pm
Betreff: Re: [GRASS5] Voxels/3D rasters in GRASS 6.1
On Fri, Jul 01, 2005 at 11:50:57AM +0200, benducke@compuserve.de
wrote:> This is another mail in my desperate quest for handling 3D
data> in GRASS. I am trying voxels this time and got stuck just as
> quickly as with 3D vectors.
> Maybe someone could answer some of the questions I have.
> I am using GRASS 6.1 CVS (about 2 weeks old).
>
> 1. Do all commands that relate to voxels have r3. prefix now? Which
> other commands relate to voxels?Yes: r3.*
- plus v.vol.*
- plus g.* for file/region management (was g3.* in earlier days)> 2. r3.in.ascii mentions s.to.rast3 is there an equivalent
command for
> this in 6.1?No. I think that s.to.rast3 still needs to be ported as v.to.rast3.
> 3. When trying to visualise a voxel in nviz, I get:
>
> Illegal filename. character <> not allowed.G__open(r): mapset
(benni)> doesn't match xmapset (ô¯@DHäÿ¿|v@5&òr@ÿÿÿÿ@äÿ)
>
> on the console. Am I using a broken version of nviz?Doesn't look good. I used the Slovakia data set a few days
ago without problems.> 4. Why does r3.info not give information about the data range?
AFAIK: No, that's a TODO.
> 5. How do I get actual volume information, do I have to count the
> non NULL cells in the voxel map, then add them up? Is there
> any command that can give me 3D raster voxel statistics?There is not too much yet, I believe.
> 6. Is there any CURRENT information about voxels and GRASS on the
> web?Should be. Please help to improve the documentation...
> I would be very happy indeed about any information on this subject!
>
> Cheers,
>
> BenjaminMarkus