[Tagging] Use of oneway=yes on waterways

David Marchal penegal at live.fr
Tue Sep 20 08:18:07 UTC 2016

Note that, although exceptional, some waterways can flow both ways, according to tidal, floods, if a connected estavelle is absorbing or discharging water... Even if it is unlikely, this tag could be of some use to highlight the fact that the waterway is not subject to such stream variations.

From: letopographefou at gmail.com
To: tagging at openstreetmap.org
Date: Sat, 17 Sep 2016 14:06:23 +0200
Subject: [Tagging] Use of oneway=yes on waterways



    According to the waterway=stream wiki page

      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?


    The same question can apply to drains, ditches, canals...





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