Maris Nartiss-2 wrote:
>
> Just a quick idea - if vector map contains only rivers, You could try
> out v.to.rast and then r.thin till You get something similar to river
> and then convert back to vectors with r.to.vect.
>
> Report, if it works.
>
> Maris.
>
> 2008/1/24, Gabriele Nolè <[EMAIL PROTECTED]>:
>>
>> Ah, :-(
>>
>> I do not think there is anything alternative.
>>
>> I will be careful if you solve this problem.
>> However thanks
>>
>> Gabriele
>>
>>
>>
>>
>> > On 24.01.2008 14:03, Gabriele N. wrote:
>> > > I would locate the midline of the river.
>> > > So I would like to transform the polygon with the middle line.
>> > >
>> >
>> > Ah now I get it. Unfortunately v.generalize doesn't support merging
>> > (yet). Also I don't have time to work on that at the moment. Daniel
>> > would you have time to implement this?
>> >
>> > --Wolf
>> >
>> > --
>> >
>> > <:3 )---- Wolf Bergenheim ----( 8:>
>> >
>> >
>>
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>
I have already tried with r.thin etc. .. but sometimes I need a little too
pixels (because the rivers is very narrow and contorted) to avoid errors of
approximation.
The problem is that choosing a region with high resolution happens ' out of
memory error '.
Thanks
--
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