Should we strive for a global or regional consensus for things like trail visibility & difficulty (sac etc), and possible pathless paths?

[Hungerburg (Asa Hundert)]

There was lots of text proposed in the beginning of this topic regarding visibility in low light, bad weather, wrong season, &c. The first picture path outperforms the second one by miles on this. Perhaps it simply is beyond the range of that key, much like UIAA III climbs are beyond sac_scale

Tag trail_visibility: Proposed Improvements for this Descriptive Tag

I propose to change the wording in the abstract to say: The key trail_visibility=* is used as a classification scheme for informal, back-country and wilderness paths. That would be an update that mirrored actual usage.