[OSM-talk] Ditches

Steve Bennett stevagewp at gmail.com
Tue Dec 15 15:22:54 GMT 2009


On Wed, Dec 16, 2009 at 2:03 AM, Anthony <osm at inbox.org> wrote:
> which I don't see as a bridge.  I could go with tunnel=yes on the "ditch",
> but it's really not a ditch at all at the point it passes under the road.

Before the road:
waterway=drain, barrier=ditch

Under the road:
waterway=drain, tunnel=yes

> Honestly, I don't see how the road situation isn't a case of
> barrier=entrance.  The ditch stops for a little bit where the road crosses
> it.  Under the road is not a ditch, but a drainpipe.  barrier=entrance +
> drainpipe=yes?

Depends how important the water is. Using barrier=entrance you're
basically saying "there's a ditch on the left, and a ditch on the
right, but there's a gap between them that you can drive through".
Using "waterway=drain tunnel=yes", you're saying "there was water
flowing through an open ditch on the left, then it went into a tunnel
under the road, now it's flowing through an open ditch on the right".
Your call.

> That's mapped as a junction, not a bridge (barrier=wall, bridge=yes?), and
> it's pretty much the same thing (only, underground instead of over ground).
>
> barrier=drainpipe (as an "access node"), access=yes?

Oh, I've finally understood..oops. You want to map this as a node, not
a way. Maybe barrier=culvert is appropriate after all...but it's kind
of gross.

Steve




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