[GRASS-user] using v.line.center

[Manuel Sangiao]

Dzie,kuje bardzo Maciej,

It has worked,


2008/6/6 Maciej Sieczka <tutey at o2.pl>:

> Manuel Sangiao pisze:
>
>> Hi all,
>>
>> after the reprojection in another mapset I used v.line.center, all
>> ok. But, I obtain a new layer without database. The input layer have
>> database.
>>
>
> v.line.center does not copy the input vector's table to output vector.
>
>  v.db.connect -p glines1 Vector map <glines1> is connected by: layer
>> <2> table <glines1> in database
>> </scratch/manuel/GISDATA//admprojected/manuel/dbf/> through driver
>> <dbf> with key <cat>
>>
>
>  I have read that the result layer (pts1) contains the category
>> numbers of the input vector line layer.
>>
>> Is there a solution?
>>
>
> Yes. As the category numbers are the same, you can:
>
> # given that the name of the v.line.center's input vector is "lines" and
> # the output is "points":
>
> # copy the input table:
> db.copy from_table=lines to_table=points
>
> # connect the table "points" to vector map "points":
> v.db.connect points table=points
>
> Now query (d.what.vect, v.db.select) to check if everything's OK.
>
> Mind that I assume plenty of defaults in the example above - verify your
> layer number, key column name etc. Refer to to commands's manuals.
>
> Maciek
>
>
> --
> Maciej Sieczka
> www.sieczka.org
>
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