[Tagging] Rio de la Plata edit war

muralito at montevideo.com.uy muralito at montevideo.com.uy
Tue Aug 4 14:55:02 UTC 2020

----- Mensaje original -----
> De: "Christoph Hormann" <osm at imagico.de>
> Para: "Tag discussion, strategy and related tools" <tagging at openstreetmap.org>
> Enviados: Martes, 4 de Agosto 2020 8:04:55
> Asunto: Re: [Tagging] Rio de la Plata edit war

> On Monday 03 August 2020, muralito at montevideo.com.uy wrote:
>> i will try.
>> in my last mail i'm questioning the coastline placement in several
>> rivers. so,
>> -what are we mapping the coastline for?
>> -what we want from the "coastline"?
>> -what questions are we going to answer, or could we answer, with that
>> modeling of the coastline/world? (or we just draw it for the
>> renderer)
> In general in OSM
> * we are not mapping for a specific purpose, we are documenting local
> knowledge about the verifiable geography of the world.
> * what individual tags mean and how they are to be used is decided by
> the mappers using them - but not individually on a case-by-case basis
> but collectively by all the mappers of OSM together.
> The problem we have here is that there seems to be a fairly massive
> discrepancy between what some local mappers in the region seem to view
> natural=coastline to mean and what mappers in other parts of the world
> have in mind there.  My request for you to formulate a universal rule
> is meant to gauge that difference and evaluate options for a consensus.

Sure, there seems to be huge discrepancy with the meanings of the coastline, and as you said, all discrepancy is from armchair mappers. There is wide consensus in both local communities.

That is what my questions were trying to clarify, and your answers do not go in that direction, I do not ask in general in OSM, I specifically ask about the coastline. On that we have to agree. Once is it clear what we need or want the coastline to model we could determine where to place it.

It seems that is like the Great Lakes, that were initially mapped as natural=coastline for the renderer, and later corrected to natural=water. The same is here.

What it seems to be the problem most mappers see is in the "map", that the natural=coastline and the natural=water are rendered at different zooms, so it's a rendering problem. Seems that people interested on how it renders are trying to force the data so the render fulfills they expectations. Based on size Rio de la Plata  should appear in a rendering, sure yes, should be rendered as ocean, no, it should be rendered as other rivers, but also in low zooms. It's simply, just say that people want to force the coastline.

Going back to an example, for us it doesn't make sense that the coastline is drawed 70 km inland in Elbe river.



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