[OSM-talk] SOTM relations workshop: results

[Andy Allan]

On Thu, Aug 21, 2008 at 12:14 PM, Ben Laenen <benlaenen at gmail.com> wrote:

> If the route goes both ways between A and D, the ways have no roles.
>
> A ----> B <---- C -----> D
>        |       |
>        v       v
>        E ----> F
>
> If in this example the route goes from A to D via ABEFCD and the route
> goes from D to A via DCBA, the roles are as follows:
> AB, CD: no role
> BC, BE, EF: forward
> CF: backward

Spot on. Given that I know you're both agreeing with one another, and
it's still confusing, just imagine how hard it's going to be to
explain it to the other 60,000 OSMers :-)

I'm hoping that having rendered examples, like
http://www.flickr.com/photos/gravitystorm/2771299743/ should at least
keep people on the right track.

Cheers,
Andy