3. Lipiec 2018 12:24 od osm.tagg...@thorsten.engler.id.au 
<mailto:osm.tagg...@thorsten.engler.id.au>:

> A waterway=canal, waterway=river, or waterway=stream way inside a lake or 
> pond is probably appropriate to connect an in-flow to an out-flow in a direct 
> line, to allow software to easily trace waterways through lakes or ponds 
> (which are essentially just widening of the waterway) without having to 
> process areas.




I am not sure whatever "to allow software to easily trace" is appropriate 
reason,

but at least in some cases rivers/streams are considered to not be interrupted 
by


lake/pond (so stream is not considered to end before lake and start again, but 
is 


considered to exist within lake).
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