Without being familiar with the topic at all, and seeing that there don’t seem to be any matching tags yet, maybe something like waterway=dredged_channel ?
From: Volker Schmidt <[email protected]> Sent: Sunday, 1 July 2018 01:42 To: Tag discussion, strategy and related tools <[email protected]> Subject: Re: [Tagging] nautical channels On Sat, 30 Jun 2018, 14:03 Paul Allen, <[email protected] <mailto:[email protected]> > wrote The way to handle navigable channels across lagoons/lakes is covered at https://wiki.openstreetmap.org/wiki/Key:route (you might have to invent route=boat or route=ship). I am aware the route relations for, e.g., ferry boats. What I want to tag are not routes but the water-equivalent of roads. The ferry-boat route (in the lagoon of Venice) uses the navigation channels ("canali") like a bus line follows roads. At present (always on the lagoon of Venice) mappers would map each "vaporetto" (water bus) route as a separate way plus the "canali" as separate, more or less parallel, ways. I would think that the roads plus bus route relations model should be applied also to navigation channels and water-based transport in the, admittedly, very specific context of the Laguna Di Venetian.
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