At touristic vantage points, one can sometimes find engraved metal discs that show the bearings and distances to other visible places like mountains in the area, or to far away cities and places. An example would be the plaque found in Sabah on Borneo:
Image taken from "Expedition to the Center of Sabah" on MySabah.com
Is there a term for these types of discs?
On the blog I linked to, the author uses the term 'metal “compass” plaque', but that's not really accurate, since the marked points aren't "points of the compass" in the sense of divisions of the cardinal directions.
A Google search for "metal plaque distances bearings" or "engraved disc distances directions" or various combinations of those strings doesn't turn up relevant results. The image shown above was found using Google Image Search with "metal plaque directions distance", which also turned up a couple of other images of examples, but no authoritative sites that would be helpful in finding a proper term for these discs.