[GRASSLIST:2131] v.buffer question

Miha STAUT mihastaut at hotmail.com
Mon Jan 5 09:15:23 EST 2004


Hi,

GRASS:/home > v.info drag.f
+----------------------------------------------------------------------------+
| Layer:    drag.f                         Date: 7.7.2003                    
|
| Mapset:   PERMANENT                      Organization: MIHA STAUT DIPLOMSK 
|
| Location: d                              Name of creator: Miha Staut       
|
| DataBase: /home/miha                                                       
|
| Title:     ( drag.f)                                                       
|
|----------------------------------------------------------------------------|
|                                                                            
|
|   Type of Map:  Vector (level: 2)        Number of Categories: 1           
|
|                                          Number of lines:      1           
|
|                                          Number of areas:      1           
|
|                                          Number of islands:    1           
|
|                                                                            
|
|   Projection: UTM (zone 33)                                                
|
|            N:     194000    S:      30000                                  
|
|            E:     623000    W:     375000                                  
|
|                                                                            
|
|   Source date:                                                             
|
|   Original scale 1:25000                                                   
|
|   Map threshold: 0.00000                                                   
|
|   Comments:                                                                
|
|                                                                            
|
|                                                                            
|
+----------------------------------------------------------------------------+
(I know v.info is from GRASS 5.3. I just wanted to show what type of vector 
I am dealing with.)

v.buffer in=drag out=drag.buff type=area buff=500

Areas buffers ...  100%


Building parts of topology ...
1 primitives registered
Number of nodes     :   1
Number of primitives:   1
Number of points    :   0
Number of lines     :   0
Number of boundaries:   1
Number of centroids :   0
Number of areas     :   -
Number of isles     :   -
Snapping boundaries ...
All vertices:  6115
Registered points (unique coordinates):  1725
Nodes marked as anchor     :  1723
Nodes marked to be snapped :     2
Snapped vertices :  1465
New vertices     :    17
Breaking boundaries ...
Intersections:     0


The command ran for 2 hours and did not manage to buffer the vector. What 
have I done wrong? Why did the v.buffer show no area if I converted an area 
vector to GRASS 5.7?

Thanks, Miha Staut

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