[GRASS5] nviz and volumes

[Jaro Hofierka]

Jachym, the top-bottom resolution in the first case is 1 m (0-1). In 
that case you cannot see anything because the zmin value is well above 1 m.

Jaro

Jachym Cepicky wrote:

> if I'm not wrong, I took it from
> http://mpa.itc.it/grasstutor/data_menu2nd.phtml
> the date of the set should be
> -rw-r--r--   1 jachym jachym 8,9M 2005-02-07 09:11 slovakia3d.tar.gz
> 
> g.region -3p gives
> projection: 0 (x,y)
> zone:       0
> north:      5530000
> south:      5275000
> west:       4186000
> east:       4631000
> top:        1.00000000
> bottom:     0.00000000
> nsres:      500
> nsres3:     500
> ewres:      500
> ewres3:     500
> tbres:      1
> rows:       510
> rows3:      510
> cols:       890
> cols3:      890
> depths:     1
> [Raster MASK present]
> 
> and no volumes are drawen. when I move with the viewpoint, the volume is showen
> like 2D-vector area (not 3D-vector cube).
> 
> when I set the 3D resolution value g.region -d, then it worked
> g.region -d3p
> projection: 0 (x,y)
> zone:       0
> north:      5530000
> south:      5275000
> west:       4186000
> east:       4631000
> top:        3000.00000000
> bottom:     0.00000000
> nsres:      500
> nsres3:     500
> ewres:      500
> ewres3:     500
> tbres:      500
> rows:       510
> rows3:      510
> cols:       890
> cols3:      890
> depths:     6
> [Raster MASK present]
> 
> 
> I really don't know why :-/
> 
> Jachym