Hi all,
After reading the "r.profile & subsequent chart plot" threads during the last few days, I would like to throw in a comment.
As a geologist/geochemist I need to make cross-sections, which r.profile can make. I know that I can then take r.profile's output and create a new ascii-grass vector file, open it up into a new location and mapset and then cut up the imported cross-section polygon into it's individual geological units. So now I can complete the most basic requirments of my job.
But the direction that my geological job is taking is that I need to take my surface geology and my various geological cross-sections and put them into a full 3-d model. NVIZ is a very nice tool for visualization but the problem is how to get everything into 3d.
I haven't tried it yet but can I import a "vertical" polygon vector file into grass61? If I can, is it possible to then edit it and then draw 3d polylines to start to build up a 3d model and then wire-frame?
For a while I was experimenting with a 3d modeling & animation program called "Blender". It has some brilliant 3d editing capabilities but it can only use coordinates between +/-10000.00. So it has limited use for 3d geological modeling with real-world coordinates.
Considering the "very" high cost of 3d geological modeling software, grass has some real possiblity here.
Thanks,
Phillip J. Allen
On Tuesday 30 August 2005 07:01 am, Phillip J. Allen wrote:
Hi all,
After reading the "r.profile & subsequent chart plot" threads during the
last few days, I would like to throw in a comment.
As a geologist/geochemist I need to make cross-sections, which r.profile
can make. I know that I can then take r.profile's output and create a
new ascii-grass vector file, open it up into a new location and mapset
and then cut up the imported cross-section polygon into it's individual
geological units. So now I can complete the most basic requirments of
my job.
But the direction that my geological job is taking is that I need to
take my surface geology and my various geological cross-sections and
put them into a full 3-d model. NVIZ is a very nice tool for
visualization but the problem is how to get everything into 3d.
I haven't tried it yet but can I import a "vertical" polygon vector file
into grass61? If I can, is it possible to then edit it and then draw 3d
polylines to start to build up a 3d model and then wire-frame?
For a while I was experimenting with a 3d modeling & animation program
called "Blender". It has some brilliant 3d editing capabilities but it
can only use coordinates between +/-10000.00. So it has limited use for
3d geological modeling with real-world coordinates.
Considering the "very" high cost of 3d geological modeling software,
grass has some real possiblity here.
Thanks,
Phillip J. Allen
This type of work interestes me as well. I have found in the past that POVRAY
can do this type of work, but it does require a bit of scripting. Markus has
helped me in the past to get GRASS data into POVRAY.
Dylan
--
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341