[GRASS-user] 3D geological volume modeling (raster 3D): is it really possible ?

gene martin.laloux at gmail.com
Sun Jun 10 03:44:43 PDT 2012


Ok, it works now

with the two surfaces
http://osgeo-org.1560.n6.nabble.com/file/n4980223/surfacesok.png 

the volume between the surfaces:
http://osgeo-org.1560.n6.nabble.com/file/n4980223/volumesok.png 

with the base surface:
http://osgeo-org.1560.n6.nabble.com/file/n4980223/volumes2ok.png 
and the top surface:
http://osgeo-org.1560.n6.nabble.com/file/n4980223/volumes3ok.png 

But I can not visualize it in nviz:
- I tried with isosurfaces attributes 1 and 2 or 2 only, like the threshold
values in Paraview (from  r.mapcalc 'one= 1' and r.mapcalc 'two= 2' )
GRASS 6.4.2 (geol):~ > r3.univar volume20
 100%
total null and non-null cells: 2410200
total null cells: 1703698
Of the non-null cells:
----------------------
n: 706502
minimum: 2
maximum: 2
range: 0
mean: 2
mean of absolute values: 2
standard deviation: 0
variance: 0
variation coefficient: 0 %
sum: 1413004

- I tried with different values ​​associated with surfaces :

GRASS 6.4.2 (geol):~ > r.univar bxlbase
 100%
total null and non-null cells: 48204
total null cells: 8133
Of the non-null cells:
----------------------
n: 40071
minimum: 463.652
maximum: 749.639
range: 285.987
mean: 577.433
mean of absolute values: 577.433
standard deviation: 87.919
variance: 7729.75
variation coefficient: 15.2258 %
sum: 23138333.880065918
GRASS 6.4.2 (geol):~ > r.univar bxlbase
 100%
total null and non-null cells: 48204
total null cells: 8133
Of the non-null cells:
----------------------
n: 40071
minimum: 544.634
maximum: 1081.48
range: 536.846
mean: 842.635
mean of absolute values: 842.635
standard deviation: 126.068
variance: 15893.2
variation coefficient: 14.9612 %
sum: 33765222.471862793

But my nviz remains hopelessly empty.... (only the box outline)



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