[GRASS-user] How to delete deadends?

[Maris Nartiss]

Hello,
can You, please, send in a graphical example or put for download
sample data set?

Maris.


2010/11/15, Patrick_schirmer <patrick_GIS at gmx.ch>:
> 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
>>
>>
>>
>>
>>
>>
>
>