[GRASS-user] Problem in 3D visualisation

[Markus Neteler]

2010/4/8 Yi Qiang <yi_qiang at hotmail.com>:
> Hi,
>
> I've got a problem when I was following a tutorial in Grass wiki
>
> http://grass.osgeo.org/wiki/Help_with_3D#Region_settings
>
> I import the 3D volume ASCII file （vox_data50.txt） into Grass. Then I try to
> see profiles in NVIZ. I set several constants. But I can only see a empty 3D
> box with nothing inside.

Did you set the 3D region to the data?

g.region rast3=vox -p3

> I successfully followed the example of Slovakia 3D precipitation. It works
> well and I can see beautiful profiles.
>
> I also manually create some 3D ASCII files. None of them can be properly
> displayed in NVIZ. For example, I import the following 3D ASCII file into
> grass but failed to see its profiles. I was working with Grass on WinXP SP3.
>
> Is anyone can tell me what the problem is?

I tried on Linux with your data and it works ok. I had to set the
"height" slider to a low value, though, to see the profile.

> By the way, when I type g.region rast3d=[name], it always display:
> G3d_readWindow: unable to find [C:/.../PERMANENT/grid3/vox_data50/cellhd].
> ERROR: Invalid region: North must be larger than South

Do you have white space in the path to vox_data50/cellhd ?
Which winGRASS version do you use?

Markus