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

John Eldredge john at jfeldredge.com
Tue Jul 28 14:03:30 UTC 2015


In some cases, the navigation path may be different from the named 
waterway, such as when locks and canals are used to bypass waterfalls or 
rapids.  In the case of reservoirs and lakes, some areas may be too shallow 
for navigation, so the actual navigation route may not always be the 
shortest path between the inlet and outlet points.


-- 
John F. Eldredge -- john at jfeldredge.com
"Darkness cannot drive out darkness; only light can do that. Hate cannot 
drive out hate; only love can do that." -- Martin Luther King, Jr.



On July 27, 2015 2:25:54 PM Jochen Topf <jochen at remote.org> wrote:

> On Mo, Jul 27, 2015 at 08:08:22 +0100, Lester Caine wrote:
> > On 27/07/15 19:56, Christoph Hormann wrote:
> > >> In the case where a stream flows into a reservoir , and then a stream
> > >> > (with the same name) also flows out of that reservoir, should a
> > >> > linear way be drawn through the reservoir to connect the two streams
> > >> > (the reservoir is currently represented by its own closed way tagged
> > >> > natural=water, water=reservoir)?
> >
> > > Yes.
> >
> > 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.
>
> Jochen
> --
> Jochen Topf  jochen at remote.org  http://www.jochentopf.com/  +49-351-31778688
>
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