On Sat, Sep 17, 2016 at 7:06 AM, LeTopographeFou <letopographe...@gmail.com>
> According to the waterway=stream wiki page (http://wiki.openstreetmap.
> *If a flow exists, the direction of the way must be downstream (i.e. the
> way direction follows the flow)*
> As of today there is a very small percentage of streams (17593 ways
> according to taginfo, 0.23%) with oneway=yes.
> Is there any undocumented purpose? Is it ok and safe to delete oneway=yes
> tags for streams?
Not any undocumented purpose, but oneway=yes would indicate that all
traffic on the waterway is legally obligated only to go in that direction.
A rare, but possible situation.
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