[GRASS5] NVIZ with volume + g.list -> rast3d

Michael Barton michael.barton at asu.edu
Sat Nov 13 14:02:10 EST 2004

Wow! This is amazing. This has tremendous potential for archaeology (and
geosciences of course). Congratulations.


On 11/12/04 8:23 AM, "Helena" <hmitaso at unity.ncsu.edu> wrote:

> I compiled the new 57 smoothly and tested nviz volumes again -
> they work nicely. I would like to ask others to test it to make sure
> that nothing is broken as this was a big addition - you can try
> a ready to use location slovakia from here:
> http://skagit.meas.ncsu.edu/~helena/grasswork/grassbookdat/slovakia3d.tar.gz
> use dem500 for a DEM and there is only one 3D file precip3d.500z50 that you
> can use
> for isosurfaces and cross-sections.
> To see the isosurfaces use values between 600 and 1300
> (the following image has 700 and 1000 with transparency of approx 100
> and 1300 with no transparency) and set the polygon resolution to 3 or less
> (note that for resolution 1 you may need to wait a little depending on your
> machine)
> You should get something like this:
> http://skagit.meas.ncsu.edu/~helena/grasswork/slovakiavol.jpg
> the previous images are here
> http://skagit.meas.ncsu.edu/~helena/grasswork/zrzky3dres1.jpg
> http://skagit.meas.ncsu.edu/~helena/grasswork/zrazky3d.jpg
> Markus, you can add it to the GRASS57 data sets, if you find it without
> problems,
> it is the same one as we have for the book, updated for 57 by importing the
> sites
> as vector data and by adding a grid3 file interpolated in GRASS53 - same
> parameters
> as in the book, except grid3 is output. maybe we should rename it slovakia57
> as we have with other locations.
> I was able to get it not draw the isosurfaces (the previously reported
> problem)
> when I ran it from a different mapset with no WIND3, it then gives a warning
> and uses
> DEFAULTWIND3 which in my case was set for a different area.
> You don't see the warning because nviz writes so
> much stuff - so maybe it is time to make all that talking optional (I will
> take out the references but Bob, would you be so kind and remove everything
> else
> that is not necessary?)
> There is a million little things that need to be done to have a decent
> volume support in GRASS but we are getting there,
> Helena
> Markus Neteler wrote:
>> Helena, Jaro,
>> I just tested the new NVIZ - it seems to work well,
>> congratulations!
>> I managed to visualize slices, but I didn't
>> understand yet how to visualize isosurfaces.
>> It may be useful to see the possible range
>> of data to select the appropriate value(s).
>> Thanks again for the nice enhancement,
>>  Markus
>> PS: I have added 3D raster listing to g.list:
>> GRASS 5.7.cvs:~/grassdata > g.list rast3d
>> ----------------------------------------------
>> raster3D files available in mapset jaro:
>> zrazky2.g3d
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C. Michael Barton, Professor of Anthropology
School of Human Evolution and Social Change
PO Box 872402
Arizona State University
Tempe, AZ  85287-2402

Phone: 480-965-6262
Fax: 480-965-7671
www: <www.public.asu.edu/~cmbarton>

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