Is tracktype=grade2 also for trails with large naturally occuring pieces of rock?

[Matija_Nalis]

@Mateusz_Konieczny

recently I spend (too much) time on reviewing surface values and also noticed that bare_rock

There seem to be few hundred uses of surface=bare_rock. It’s not documented on the wiki, though.

@Mateusz_Konieczny

@Matija_Nalis would you tag these surfaces as natural=bare_rock ? Would it be more clear that it was not supposed to be used for such surface?

Is that typo or not? If not: no, I would not mark surface of highway=path with natural=bare_rock, as that one is documented to applying only to areas, not ways.

If it was a typo, and you meant surface=bare_rock, I would consider it once it is documented on the wiki, and its description matches what I see. But as that one is currently undocumented, I would currently avoid it and choose best matching documented alternative (likely surface=rock).