[GRASS-user] How to delete deadends?

[Patrick_schirmer]

Thanks Markus and Hamish,

Unfortunately v.clean rmdangle will not work for me. With Threshhold<0 
it deletes more or less all lines, otherwise none. I guess it is because 
the "nests" of lines consist of 4-20 lines and are all seperated from 
each other.
Per defintion a line "is considered to be a dangle if no other line of 
given /type/ is on at least one end node" (documentation v.clean 
rmdangle). As I am searching for lines that have exactly one line as sum 
of all connecting node, this tool doesn't help.

I will try to solve the problem by creating points out of the line 
(nodes), buffering the points and delete the ones intersecting only one 
line. But I still hope that there is a more direct solution to delete 
the line as a geometry.

So if there are any other suggestions I would be happy about.
I'll keep you up to date in case I find a solution.

Cheers, Patrick



On 11/12/2010 09:51 PM, Hamish wrote:
> Patrick_schirmer wrote:
>    
>> I have a lot of lines that are linked to another
>> forming various nets. Several of those lines are
>> deadends. Now I search for a option to delete
>> "dead-ends" within those networks. It would be
>> perfect to delete the lines, or to search for the
>> nodes that link to more than one line.
>> I was searching in v.generalize, v.net,
>> v.to.point, v.to.db but won't find the proper
>> approach.
>>      
> not a v.net specific thing, but in general for
> vector maps you can use v.clean to remove (or isolate)
> line "dangles" with the 'rmdangle' (or 'chdangle')
> tools.
>
>
> maybe that helps,
> Hamish
>
>
>
>
>
>    

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