[GRASS-user] Load attributes of point theme into adjoining line theme - possible?

[Wolfgang Qual]

Hello Jarek,
in some cases of my dataset, there is sometimes more than one point related to one line-segment. In that case, only the information of the nearest point should be transferred to the corresponding line segment. Possible?

Best regards,
Wolfgang


> Hamish napisał(a):
> > Wolfgang Qual wrote:
> >   
> >> Hi list,
> >> another question with a small picture: my dataset consists of two
> >> themes, a point theme, representing locations where the traffic
> >> density of an adjoining segment of a street was measuredd and the
> >> corresponing line theme - the street. Now, I would like to add the
> >> traffic information to the line theme (in the picture below, three
> >> measurement stations are drawn). 
> >>
> >>
> >>         x(45)
> >>     ----------------�\
> >>                       \       x(100)
> >>                        \--------------------------
> >>                        /
> >>                       /
> >>         -------------�
> >>             x(55)
> >>
> >> Is it possible to perform such an operation within GRASS? Any ideas
> >> are welcome! 
> >>     
> >
> >
> > v.distance
> > ?
> >
> >
> > Hamish
> >
> > _______________________________________________
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> > grassuser at grass.itc.it
> > http://grass.itc.it/mailman/listinfo/grassuser
> >   
> well, question seems to be unclear...
> 
> it depends on how many traffic points are on the one line segment If one 
> to one the situation is very simple. Use v.distance with to_attr 
> parameter (from line to point!), if there are more mesurment points it 
> could be the problem. relation between points and line shall to be 
> crated (v.distance from points to line with cat attrribute), and the 
> rest of work in database. If there are more than one point to segment 
> please let me know I will try to describe how to make it in detail.

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