[GRASSLIST:10489] Re: Question about v.vol.rst in GRASS 6.1

[Thomas Adams]

Markus,

Thank you very much! Obviously my first time working with 3D in GRASS. A 
procedural question: typically when would the B & T boundaries be set? 
My guess is that it depends on the dataset one is working with, so it 
needs to be reset depending on the vertical range of the (elevation) data?

Tom


Markus Neteler wrote:

>Tom,
>
>the settings are not right:
>
>v.info ...
> |            B: 99.000        T: 1155.000                                    |
>
>g.region -p3
>top:        1.00000000
>bottom:     0.00000000
>
>
>You see that the 3D region is defined from 0 to 1 meter while
>3D points are "flying" from 99 to 1155 meters.
>
>You will have to use
>       t   Value for the top edge
>       b   Value for the bottom edge
>    res3   3D grid resolution (north-south, east-west and top-bottom)
>of g.region to get it right.
>
>Markus
>
>
>On Tue, Feb 21, 2006 at 11:36:51AM -0500, Thomas Adams wrote:
>  
>
>>Markus,
>>
>>I did as you suggested ? it looks OK to me, although I'm not sure. 
>>Please see the attachment.
>>
>>Tom
>>
>>
>>Markus Neteler wrote:
>>
>>    
>>
>>>On Tue, Feb 21, 2006 at 11:13:52AM -0500, Thomas Adams wrote:
>>>
>>>
>>>      
>>>
>>>>List:
>>>>
>>>>I am trying to use v.vol.rst in GRASS 6.1cvs on a Linux system. First, 
>>>>using the command:
>>>>
>>>>v.vol.rst -c input=sta_obs_temp_20050731_08 wcolumn=temp 
>>>>maskmap=gtopo30.eastern.us segmax=700 tension=10 cvdev=cvdev_map
>>>>
>>>>I get the following:
>>>>
>>>>118 records selected from table
>>>>WARNING: some points outside of region -- will ignore...
>>>>WARNING: strip exists with insufficient data
>>>>Processing all selected output files will require 0 bytes of disk space 
>>>>for temp files
>>>>
>>>>WARNING: There are points outside specified 2D/3D region--ignored 118 
>>>>points (total points: 118)
>>>>ERROR: zero points in the given region!
>>>>ERROR: input failed!
>>>>
>>>>I just don't understand what's going on; all the points appear when I 
>>>>display them. I'm able to query the points and perform other analyses, 
>>>>such as, v.surf.idw.
>>>>
>>>>Regards,
>>>>  
>>>>
>>>>        
>>>>
>>>Tom,
>>>
>>>please check with 
>>>
>>>v.info sta_obs_temp_20050731_08
>>>
>>>top and bottom of the data (since we are using 3D data here).
>>>
>>>Then check with
>>>g.region -p3
>>>
>>>if the volume region settings are defined appropriately
>>>("There are points outside specified 2D/3D region--ignored 118").
>>>
>>>I assume that you have to define the volume properly.
>>>Please suggest a better error message.
>>>
>>>Regards
>>>
>>>Markus
>>>
>>>
>>>
>>>      
>>>
>>-- 
>>Thomas E Adams
>>National Weather Service
>>Ohio River Forecast Center
>>1901 South State Route 134
>>Wilmington, OH 45177
>>
>>EMAIL:	thomas.adams at noaa.gov
>>
>>VOICE:	937-383-0528
>>FAX:	937-383-0033
>>
>>    
>>
>
>  
>
>>GRASS-GRID > v.info sta_obs_temp_20050731_08
>> +----------------------------------------------------------------------------+
>> | Layer:    sta_obs_temp_20050731_08       Organization:                     |
>> | Mapset:   tea                            Source Date:                      |
>> | Location: mm5                            Name of creator:                  |
>> | Database: /grass/data                                                      |
>> | Title:                                                                     |
>> | Map Scale:  1:1                                                            |
>> | Map format: native                                                         |
>> |----------------------------------------------------------------------------|
>> |   Type of Map:  Vector (level: 2)                                          |
>> |                                                                            |
>> |   Number of points:       118             Number of areas:      0          |
>> |   Number of lines:        0               Number of islands:    0          |
>> |   Number of boundaries:   0               Number of faces:      0          |
>> |   Number of centroids:    0               Number of kernels:    0          |
>> |                                                                            |
>> |   Map is 3D:              1                                                |
>> |   Number of dblinks:      1                                                |
>> |                                                                            |
>> |   Projection: Lambert Conformal Conic (zone 0)                             |
>> |            N: 398185.942    S: -342056.941                                 |
>> |            E: 632334.575    W: -364736.996                                 |
>> |            B: 99.000        T: 1155.000                                    |
>> |                                                                            |
>> |   Digitize threshold: 0.00000                                              |
>> |   Comments:                                                                |
>> |                                                                            |
>> +----------------------------------------------------------------------------+
>>
>>Mapset <tea> in Location <mm5>
>>GRASS-GRID > g.region -p3
>>projection: 99 (Lambert Conformal Conic)
>>zone:       0
>>datum:      wgs84
>>ellipsoid:  wgs84
>>north:      486000
>>south:      -486000
>>west:       -351000
>>east:       675000
>>top:        1.00000000
>>bottom:     0.00000000
>>nsres:      9000
>>nsres3:     1
>>ewres:      9000
>>ewres3:     1
>>tbres:      1
>>rows:       108
>>rows3:      972000
>>cols:       114
>>cols3:      1026000
>>depths:     1
>>
>>    
>>
>
>
>  
>


-- 
Thomas E Adams
National Weather Service
Ohio River Forecast Center
1901 South State Route 134
Wilmington, OH 45177

EMAIL:	thomas.adams at noaa.gov

VOICE:	937-383-0528
FAX:	937-383-0033