Talk:Proposed features/Rivers Classification

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General

Seems to be simple, without complexity issues, fixing problems appearing in Proposed features/Waterways classification Mateusz Konieczny (talk) 20:36, 1 September 2017 (UTC)

Is entire river supposed to be mapped with the same importance tag? Not that at least some major rivers start as small stream - is it also supposed to be mapped as very important river? Mateusz Konieczny (talk) 15:48, 2 September 2017 (UTC)

Yes, importance is an attribute of the entire river. If you draw on a map just a part of the river where it is wider that some average, that would puzzle a user, especially when they know the river is longer. --Zverik (talk) 18:09, 2 September 2017 (UTC)

Relations

But these relations are mapped inconsistently, and even if you could maintain a hundred relations for major rivers, I doubt all the big rivers would have their relations mapped in at least a decade, without breaking any of these.

May you please give me an example of a "major" river with a broken relation?--Ethylisocyanat (talk) 21:28, 2 September 2017 (UTC)

No, I can not. For that we at least need to have a list of relations for major rivers, and we don't. To answer yout question, I would need to go through all handred rivers and check their relations: while the question took you a minute, I would need to spend several hours to answer it. I know of a few major road relations that are constantly broken, why that won't be the case for river relations? --Zverik (talk) 07:01, 3 September 2017 (UTC)
Actually there exists such QA tool, so we can check these relations quite easy: http://www.h-renrew.de/h/osm/osmchecks/07_watershed/index.html --Kocio (talk) 07:17, 3 September 2017 (UTC)

I'm in favour of this proposal if it is applied only to waterway relations. The classification seems crude but effective. But if it's meant to be applied to the whole river, then it should be applied to the relation - that's what it's for. Adding ways to a relation and then adding a tag is much easier than trying to ensure that all ways are tagged separately. Yes, there are some broken relations (e.g. which describe all rivers in a catchment rather than a single river), but as someone who has specifically been working on this, I'd say you'd be surprised by current progress. The number of relations is already in the 10s of thousands, not 100s. It's safe to assume that rivers without relations are either small, or would have a relation created very soon to ensure they are rendered. I would also add that at least major rivers should have a wikipedia/wikidata tag, reflecting their importance. -- JoeG (talk) 07:58, 3 September 2017 (UTC)