[OSM-talk] waterway - "routable network" and reservoirs/lakes

Mike Thompson miketho16 at gmail.com
Mon Jul 27 19:55:49 UTC 2015

> > Although a height difference between in and out might indicate a weir or
> > other obstruction may well indicate that a route is non-navigable? The
> > outflow from a dam may have the same name, but have no use as a through
> > route?
> This is more about the water flow than about being navigable by a ship.
> I assumed that when the wiki spoke about "routable" it was referring to
the water flow rather than boat/ship/barge traffic.   In any event, a
routing engine for boats could use the presence of a dam or weir (combined
with the absence of a lock) to deduce that ship navigation was not
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