[Tagging] Proposed tag value: surface=bare_rock

[Martin Koppenhoefer]

> Am 14.05.2015 um 01:20 schrieb Warin <61sundowner at gmail.com>:
> 
> Where the 'ground' varies frequently from sand, dirt, rock, grass it may be a reasonable description? 


yes, besides "grass" which should not be tagged as ground


> I simply label it 'unpaved'.


unpaved gives no indication on the interaction with water/moisture. On mineral grounds that are not too fine you will have good draining, on organic soils, silt or clay it will become slippery when wet.

cheers 
Martin