[OSM-talk] Ditches

[Anthony]

On Tue, Dec 15, 2009 at 7:01 AM, Martin Koppenhoefer <dieterdreist at gmail.com
> wrote:

> No, there's no junction node as the bridge goes over it, so
> barrier=entrance is not right here.


Thanks everyone, especially Mike Harris and Martin Koppenhoefer.  I'm
convinced that barrier=entrance is wrong in this case.

The two wood bridges I'll have to split (in Merkaartor I guess as that's the
only editor I can get to work with the USGS high res imagery).

I'm still a little unsure about the roadway.  Because of the use of the
drainpipes it's more like (
http://www.coquillewatershed.org/Project%20photos/pages/lampa-199-culvert-03.htm),
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.
Also, because the roadway is linear, splitting the ditch doesn't really get
the geometry right, it leaves a gap.

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?

http://wiki.openstreetmap.org/wiki/Image:Sallyport.jpg

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?
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