[GRASSLIST:1561] Re: d.path & directions

[Radim Blazek]

On Saturday 25 October 2003 13:26, you wrote:
> Hello list,
> I have a conectual problem :(
> We have a directed vector map, i.e.roads in spearfish dataset, I use:
>  d.vect roads display=dir
> to view that. GRASS 5.7 shows it and display some arrows for directions.
> then I use d.path to find path between two points.
> It works and draw a red line for path, but it goes irregularly through one
> ways. why? despite arrows show directions of roads, don't they?

Arrows show direction, but all net modules take lines as bidirectional
if 'abcol' option is not used. Use -1 as costs to close one direction.

Radim