[GRASS-user] Contour lines extraction

[Maciej Sieczka]

Odoardo Zecca napisa?(a):
> On 7/21/06, Odoardo Zecca <odoardo.zecca at gmail.com> wrote:
>>
>> Thank you Maciej.
>>
>> It seem to work only for points, but not for lines. Maybe this doesn't
>> work for lines because they don't have a unique x and y but only a
>> unique z,
>> or am I doing something wrong?
>>
> 
> OK!  the  right option is  'start'  (or  'end'):
> 
>  v.db.addcol map=cl6361 layer=1 "columns=x double precision,y double
> precision,z double precision"
> 
> v.to.db map=cl6361 type=line layer=1 qlayer=1 units=meters option=start
> column=x,y,z
> 
> Thank you very much, Maciej, this is an important step for may work!

Glad I could help.

Best,
Maciek