Sorry when getting on nerves with this stupid problem...
...for me its not stupid, but also getting on nerves.
...I always did and do:
v.category --overwrite input=my_li...@achim output=my_lines2 type=line
layer=1
Vector map <my_lines2> already exists and will be overwritten
Processing features...
Copying attribute table(s)...
Building topology for vector map <my_lines2>...
Registering primitives...
20002326 primitives registered
4652 vertices registered
Building areas...
0 areas built
0 isles built
Attaching islands...
Attaching centroids...
Number of nodes: 2410
Number of primitives: 2326
Number of points: 0
Number of lines: 2326
Number of boundaries: 0
Number of centroids: 0
Number of areas: 0
Number of isles: 0
v.category complete. 2326 features modified.
...now I get:
v.category -g input=my_lin...@achim output=my_lines2 option=report type=line
1 line 2326 1 2326
1 all 2326 1 2326
...but nothing is seen with 'table manager'...
(because categorization is to store 'hard' in the geometry layer and not
'soft' in the corresponding table. For this a v.to.db has to be done?)
now:
v.to.db map=my_lin...@achim option=cat
Reading features...
Updating database...
2326 categories read from vector map (layer 1)
2326 categories read from vector map don't exist in selection from table
2326 records updated/inserted (layer 1)
...and all is done. All I wanted is seen with 'table manager'!
> If you really want cat values for your boundaries, again: use v.category
> option=add type=boundary
eg. sometimes it is useful to describe features of borders between two
areas with v.to.db -option=sides
More on my wishes..later in a mail.
For now: thank you very much for helping! Sometimes a spoken word and a
little hint in physical presence is easier. But maybe one or another can
avoid mistakes reading this.
Best regards,
Achim
Moritz Lennert wrote:
On 26/06/09 17:15, achim wrote:
Thats exactly the problem: It shows nothing.
None of my lines has any cat.
That's why you have to run v.category option=add as I indicated in a
previous mail.
Another example where it works partly:
| Type of Map: vector (level: 2)
| Number of points: 1 Number of areas: 56
| Number of lines: 0 Number of islands: 1
| Number of boundaries: 255 Number of faces: 0
| Number of centroids: 56 Number of kernels: 0
|
| Map is 3D: No
| Number of dblinks: 1
successfully created a table with 57 entries
?->.
What is the problem ?
And now: how to do the same with boundaries?
Why do you want your boundaries to have category values ? An area in
GRASS is defined by the combination of boundaries with a centroid and
the attribute data is attached to the centroid, not to the boundary.
If you really want cat values for your boundaries, again: use v.category
option=add type=boundary.
Have you read:
http://grass.itc.it/grass64/manuals/html64_user/vectorintro.html
http://grass.osgeo.org/wiki/Vector_Database_Management
?
Moritz
Moritz
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