[Tagging] Mapping cave tunnels passable by human

[Tobias Knerr]

On 14.08.2014 12:47, Dan S wrote:
> Well, no-one ever supports "new" tagging, the question is if it's
> needed. But I agree, I can't see a benefit keeping it separate.

Are you suggesting that there are no relevant differences between a
man-made tunnel and a cave? I can think of a lot – naturally formed,
uneven walls and floors, varying height and so on.

In general, it's also a lot easier for applications to treat two tags
the same than to treat the same tag differently. So I think you really
should distinguish between caves and tunnels.

If you don't want a new key, then use tunnel=cave or something. But in
my opinion, cave=yes would also work fine.