Brian Prangle wrote:
> We have several oil terminals just to the E of Birmingham and wandering 
> around the countryside I come across loads of pipeline markers. In 
> places there are enough to join them up with man-made=pipeline ways. My 

Excellent. I've done this at a really small scale as well, and even made 
up tagging for these nodes as well, including ref=*, operator=*, and 
various other pertinent bits of information for those markers, and 
connected the odd ones into a pipeline way.

> 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?

Don't worry that much about what mapnik shows. I would've used 
oneway=yes tagging as well, I think. Either that, or possibly 
flow=forward/backward.

Mapnik currently renders oneway arrows for *every* way with the 
oneway=yes tag, and that could probably be limited to 
highway/railway/waterway=* without serious impact to the map. Speak up 
if you think this is a bad idea, else this change can go in soon.

-- 
Lennard

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