[Tagging] surface=rock

[Tobias Zwick]

 > rock „pieces“ would be tagged as „stone“ I guess?

Not so sure about that, then it would be surface=stones, (note the 
plural) wouldn't it?

---

There is a huge discussion on the #tagging channel on OSM slack (85+ 
replies) where all those "rocky" surface are being discussed.

Here are some statements from this discussion, also on the difference 
between "surface=rock" and "surface=stone". Most from Brian Sperlongano 
and Elliott Plack:

- Rock implies a rough naturalness

- Steps made of large (single-piece) hewn stone columns would be called 
'stone steps'

- Bare [rock] implies the lack of rubble on top

- Scree is specially loose

- Personally I think bare_rock and stone are synonyms here, unless 
someone thinks there's a difference.

- bare_rock has 569 usages, rock has 2759 usages and stone has 6402 
usages, scree has 319 usages, rocky has 1400 uses

---

For Germans, I'd say stone roughly translates to "Stein" while rock 
translates to "Fels". To summarize the above:

rock = rough natural stone, could be loose stones too
stone = smooth stone / bare rock, could be hewn
bare_rock = probably similar to stone, definitely no loose stones
scree = surface like (large) gravel, natural
rocky = scree is rocky, piles of differently sized rocks are rocky

Tobias

On 21/11/2020 09:57, Martin Koppenhoefer wrote:
> 
> 
> sent from a phone
> 
>> On 20. Nov 2020, at 23:22, Mateusz Konieczny via Tagging <tagging at openstreetmap.org> wrote:
>>
>> Both for exposed natural rock and steps/footways made of rock pieces?
> 
> 
> rock „pieces“ would be tagged as „stone“ I guess?
> 
> 
> Cheers Martin
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