Looking at https://en.wikipedia.org/wiki/Cairn it seems that it is something more purposefully constructed than "pile of unwanted stones kept in one place"
Create area and mark as surface=stone ? man_made=pile_of_stones ? Nov 20, 2020, 23:32 by graemefi...@gmail.com: > I was having similar thoughts just a couple of days ago, about what to call a > pile of rocks that a farmer has cleared from, then piled up in, a field? > > natural=bare_rock says it's exposed bedrock > =scree has fallen from an adjacent rockface > =shingle is on a beach or river bed > =stone is for large boulders > =rock is "a notable rock feature or small group of rocks, attached to the > underlying bedrock" > none of which really fit? > > I did see man_made=cairn as "a mound of stones, usually conical or pyramidal, > raised as a landmark or to designate a point of importance in surveying", > which also isn't really right, because this isn't for any use apart from > getting all the rocks in one place. > > Thanks > > Graeme > > > On Sat, 21 Nov 2020 at 08:01, Mateusz Konieczny via Tagging <> > tagging@openstreetmap.org> > wrote: > >> It seems that we have no good value to mark surface of path of rocky paths. >>
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