[Tagging] Concrete vs concrete:plates should we simplify?

[Mateusz Konieczny]

> should be deprecated

If I would design it from scratch it would be likely a separate tag or there would be
surface=concrete concrete=transverse_joints concrete=plates and so on

But it may be too late for that.

> Personally, I'm 90% sure concrete:plates is being used wrong and should be deprecated. 
>
Are you sure? Given for example
https://help.openstreetmap.org/questions/85524/concrete-vs-concreteplates/85525
90% claims seems highly dubious.

Can you give specific photo examples of places where concrete:plates is used incorrectly
in your opinion? Or likely to be used incorrectly

You linked for example 
https://roadsandbridges.s3.amazonaws.com/s3fs-public/Photo%201%20-%20Precast%20deck%20panels%20in%20place.JPG
in OSM Help site, but that is a construction element which will be likely covered
by asphalt.

> What's the goal of differentiating concrete vs concrete:plates anyway?
>
To detect/mark places where you will be very likely hit with
"thump thump" when driving on them.

Obnoxious especially to cyclist.

smoothness can sort of tag this, but it is kind of special problem.


> Personally, I'm 90% sure concrete:plates is being used wrong
>
In which way it is wrong? Do you think that vast majority is used where 
there are no plates?

> Another way this camp has described `concrete:plates` is "clearly see the plates and the regular gaps". I believe this leads one to believe, incorrectly, that a transverse joint in a road makes the concrete:panel.
>
https://taginfo.openstreetmap.org/search?q=surface%3Dconcrete%3Apanel - this 
seems unused

If you meant concrete:plates - on which you base that it is a widespread misconception?

> Those that read the wiki which describes that plates are "Heavy-duty plates chained closely together" that should be "pre-fabricated", with concrete:plates only being used when "you know how the concrete is laid out". That is to say that concrete:plate is in reference to "Precast Concrete Deck Panels" which is a more search-friendly term. This camp does not believe a "concrete:panel" is concrete poured on site with a transverse joint.
>
>From looking at 
https://duckduckgo.com/?t=ffab&q=Precast+Concrete+Deck+Panels&iax=images&ia=images
it seems that "Precast Concrete Deck Panels" is a structural element of bridge - not
surface exposed to cars. So it is not really relevant (unless I am wrong?)

> Note _most_ concrete roads built professionally are going to be built with "transverse joints" the question here is whether or not concrete with "transverse joints" "concrete:plate". I'm going to suppose the answer is no.
>
I also think so.

>  If it's not, and we can't really differentiate between a "pre-fabricated plate" and a concrete poured on site with a transverse joint
>
In many cases you can be sure that it is concrete:plates due to significant gaps, plate
handling elements being exposed.

And most commonly: each plate being level on its piece but not matching other plates.

>
> , it seems the best course action is to simplify and deprecate concrete:plate, offering just "concrete". Note if you want to see even bigger joints that can be poured into concrete and result in mistagging, check out an "expansion joint" on google.
>
I do not see any dubious images.

>
> I'm not an expert on concrete. But I don't think the wiki on concrete:plates is useful
>

That can be a reason to improve wiki page rather than deprecate widely used and 
useful tag.

This topic is inspired by

> https://help.openstreetmap.org/questions/85524/concrete-vs-concrete-plates
> https://github.com/streetcomplete/StreetComplete/issues/4344
>
>

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