[Talk-GB] Underground Pipelines

[Jonathan Bennett]

Brian Prangle wrote:
> My problem is how to tag the direction of flow. The oil pipeline markers
> have the direction of flow indicated on them ( gas ones don't). I've
> tagged the pipelines as oneway=yes which results in mapnik rendering
> little blue arrows in the countryside. Whilst this is to me ( who's
> mapped them) a good indicator of the presence of a buried pipeline it
> will probably be meaningless to any one else. Any opinions out there?

Contrary to what everyone else has said, I'd disagree that oneway=yes is
 correct. When added to roads, this has a meaning of "it's only legal to
for a vehicle to travel in the prescribed direction along this way",
rather than it being a physical property.

You *could* drive the wrong way along a one-way street, but in
contravention of the law of the land. The laws governing the pipeline
are those of physics, which are notoriously harder to break.

I'd say tagging as a pipeline makes the flow implicitly one way, and you
should make sure the way points in the direction of flow (which it
appears you have).

Rendering is just a side issue :)

-- 
Jonathan (Jonobennett)