[GRASS-user] cutting a 3d volume with a 2d surface

GRASS GRASS user
1

Dears, can I "cut" a 3d volume using a 2d (ok, 2.5d) surface?
interpolating wir r3.* gives me the results inside a rectangular
prism. can I use a surface (like topography) to remove the upper part
of the volume?

tks

--
Prof. Carlos Henrique Grohmann - Geologist D.Sc.
Institute of Geosciences - Univ. of São Paulo, Brazil
http://www.igc.usp.br/pessoais/guano
Linux User #89721
________________
Can’t stop the signal.

2

On Wed, May 26, 2010 at 7:50 PM, Carlos Grohmann
<carlos.grohmann@gmail.com> wrote:

Dears, can I "cut" a 3d volume using a 2d (ok, 2.5d) surface?

Do you mean this?
http://grass.osgeo.org/grass64/manuals/html64_user/r3.cross.rast.html

interpolating wir r3.* gives me the results inside a rectangular
prism. can I use a surface (like topography) to remove the upper part
of the volume?

.. sounds more like a job for r3.mapcalc...

Markus

3

Hello Markus, thanks for your reply.

Actually is something more like the png attached. The result is not a
2.5D surface, but a 3D solid.
Maybe Paraview can do it?

best

Carlos

On Wed, May 26, 2010 at 18:52, Markus Neteler <neteler@osgeo.org> wrote:

On Wed, May 26, 2010 at 7:50 PM, Carlos Grohmann
<carlos.grohmann@gmail.com> wrote:

Dears, can I "cut" a 3d volume using a 2d (ok, 2.5d) surface?

Do you mean this?
http://grass.osgeo.org/grass64/manuals/html64_user/r3.cross.rast.html

interpolating wir r3.* gives me the results inside a rectangular
prism. can I use a surface (like topography) to remove the upper part
of the volume?

.. sounds more like a job for r3.mapcalc...

Markus

--
Prof. Carlos Henrique Grohmann - Geologist D.Sc.
Institute of Geosciences - Univ. of São Paulo, Brazil
http://www.igc.usp.br/pessoais/guano
http://lattes.cnpq.br/5846052449613692
Linux User #89721
________________
Can’t stop the signal.

(attachments)

path2896.png