[Tagging] Hiking trail marker

[Andrew Errington]

Hello,

How should I tag this?  It is a trail marker on a hiking trail in Korea.
http://wiki.openstreetmap.org/wiki/User:Geochang_scribe#What.27s_this.3F

There are several of them, at various points on each trail.  The purpose is to 
indicate where you are on the trail, and also when requesting help due to 
accidents or other incidents to report your location to rescuers.

It's probably related to tourism=information, information=guidepost, but it's 
not quite the same (and we do have conventional signposts here).  I'd almost 
be inclined to invent something like information=trail_marker, but does 
anyone have similar marker posts in other countries?  How are they tagged?

Thanks,

Andrew