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

[Markus Neteler]

On Wed, Aug 27, 2008 at 7:16 AM, Jachym Cepicky
<jachym.cepicky at gmail.com> wrote:
> Hi,
>
> what does g.region -3 say? maybe you have to adjust your 3D settings
> as well (g.region --help tells you more)

[ I don't think so since we talk vector data here ]

Charles,
we are investigating on the grass-dev list. There was
some issue in v.extrude and the underlying sampling algorithms.

I'll report here once fixed. However, when writing that book
chapter, it worked (for me). That was 6.3.0preX (don't remember).
In 6.4.svn it failed for me but yesterday some fixes where
submitted. I'll report asap.

Markus


> jachym
>
> 2008/8/23 charles <eriseres at airpost.net>:
>> 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
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