[OSM-talk] Mapping rivers that flow into/through lakes?

Joseph Reeves iknowjoseph at gmail.com
Fri Feb 23 10:45:23 UTC 2018


Hi all,

Slightly off topic, but I was recently wondering if there was a waterway
routing tool available? As in, I'd like to click a point in a waterway and
have the downstream route plotted, presumably to the sea. It appears to me
that a tool like that could be useful in this discussion?

Despite my best efforts, I keep finding river drainage basins fascinating :)

Cheers, Joseph



On 23 February 2018 at 10:35, Rory McCann <rory at technomancy.org> wrote:

> On 23/02/18 06:53, Maarten Deen wrote:
>
>> I see nothing wrong with those examples, I would do it the same,
>> especially if the rivers can be sailed on by boat. Then you absolutely need
>> the rivers to be connected to a central river (or fairway) in the lake.
>>
>
> But then how far do you go? Should every stream be connected to the
> central river? e.g. what about here ( http://tools.geofabrik.de/osmi
> /?view=water&lon=28.57869&lat=-16.75136&zoom=11 )?
>
> If some rivers/streams shouldn't be connected, then some data consumers
> will have to do an automatic connection anyway. When measuring water run
> off and pollution, you probably want to know that "stuff going into
> stream X will eventually get to point Y downstream" (right?).
>
> Connecting all means that large lakes will be full of a "skeleton" of
> joining rivers/streams, and a small 1km stream could get a lot longer.
>
>
>
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