[GRASS-user] Extracting from 2D to 3D

[charles]

Hello all,

I have purchased to book, Open Source Grass, the third edition and  
wanted to experiment with 3D vectors using nviz.  I have followed the  
commands in the book, page 209/210 but can not display the 3D vectors  
in nviz.  Is there an update to the commands or can anyone describe  
to me what I am doing wrong.

I have set the region according to the book.
GRASS 6.3.0 (nc_spm_07):~ > g.region rural_1m -p
projection: 99 (Lambert Conformal Conic)
zone:       0
datum:      nad83
ellipsoid:  a=6378137 es=0.006694380022900787
north:      220750
south:      220000
west:       638300
east:       639000
nsres:      1
ewres:      1
rows:       750
cols:       700
cells:      525000

GRASS 6.3.0 (nc_spm_07):~ > nviz elev_lid792_1m  
col=ortho_2001_t792_1m vect=bldg_resid_3d,bldg_cmcl_3d
Loading Data
Loading Data
building color table
Vector file bldg_resid_3d loaded.
Error: No lines from bldg_resid_3d fall within current region
Total vect memory = 0 Kbytes
Vector file bldg_cmcl_3d loaded.
Error: No lines from bldg_cmcl_3d fall within current region
Total vect memory = 0 Kbytes
recalculating normals...

Any advice as to setting the region for this to work?

Thanks in advance,

charles