[Tagging] Surface value for irregular, flat stones with variable gaps

[Cez jod]

"So it would be "jointed large rounded natural stones cut to a flat
top"? Smoothness similar to setts, but appearance similar to
cobblestones?

Also, [1] describes some pavements as "Cobbles chosen for flat upper
surface" which is possibly not the same as being cut, but possibly
what is meant by "flattened" in OSM. Then, for contrast, it also
describes another pavement as "Cobbles laid prominently" which is
possibly what the first users of surface=cobblestone:flattened thought
that surface=cobblestone meant - the current image in the wiki
suggests they are not that prominent [2]. The Wikipedia article on
cobblestones [3] begins with the same image [4] that is used in the
OSM wiki for cobblestone:flattened [5], then presents an image of the
more prominent type [6]."
+1
I think the definition surface=cobblestone:flattened needs to be
improved,redefinited, so that definition and photo would fit.
Tags with surface=cobblestone:flattened are not too much.

Regards
Slavo
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