[Talk-GB] Underground Pipelines
openstreetmap at jonno.cix.co.uk
Mon Nov 9 11:44:35 GMT 2009
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 :)
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