[GRASSLIST:2634] Re: v.net.path

[Radim Blazek]

What 'nothing happens' does mean? Empty vector? You should close
stdin by Ctrl-D, and it shoud do something.

BTW, I would recommend to use different field for points, so that you can later link 
arcs (lines) and nodes (points) to different tables with different structures.

Radim


On Sunday 15 February 2004 09:47, you wrote:
> Hello dear list,
> I have some problems in 5.7, I wish you help me...
>
> 1. Sometimes that I use of d.what.vect, it shows me:
>      Buttons
>      Left: what's here
>      Middle: toggle flash color
>      Right: quit
>    But when I click left key of the mouse on the map
>    nothing happens and if I do it again it shows:
>      Broken pipe
>    and quit from d.what.vect
>
> 2. When I am successful on use of d.what.vect, I have
>    these values on my street map:
>      ...
>      Type: Point
>      field: 1
>      category: 6
>      ...
>      -----------------------
>      ...
>      Type: Point
>      field: 1
>      category: 160
>      ...
>
>     Now I want to find the best path between two
> points
>     so I use:
>       v.net.path input=Teh_Vect output=t2 type=line
> afield=1 nfield=1
>     It shows:
>       Vector 't2' already exists and will be
> overwritten.
>       Building graph:
>       Registering arcs ... 100%
>       Flattening the graph ... done.
>       Graph was built.
>
>     Now I write :
>       6 160 (Is it correct?)
>     But nothing happens.
> ------------------------------------------------------
>
>
> I changed my command like this:
>
>
>  v.net.path input=Teh_Vect output=t4 afield=1 nfield=2
>
>
> Now it shows:
>
>  Building graph:
>  Registering arcs ... 100%
>  Flattening the graph ... done.
>  Graph was built.
>  WARNING: 61 points without category.
>  6 160
>  WARNING: No point with category 6
>  WARNING: No point with category 160
>
>
>
> Would you please tell me my wrong and explain me more
> about v.net.path?
>
>
> Thanks a lot
>
> Maliheh
>
>
>
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