There is noticeable (but not very high) number of
surface=marble and other similar tagging type of stone into surface tag.
I think that it would be much better to tag it as a
surface=granite blocks distinguishing between
surface=granite may be any of following
Exposed raw rock (
Natural stone machined into a flat surface (
Flattened stone, but still not entirely flat and not covering entire surface (
Raw cobblestone of natural, uncut, rounded stones. (
Stones or plates individually arranged in a row, allowing to walk on, surrounded by an unpaved medium such as grass or water (
(note: specific photos above may be not necessarily depict granite, but
surface=granite could also take such forms)
So I would propose to tag material of surface differently - maybe
material=granite would work?
So instead of
material=granite? For example instead of
highway=pedestrian surface=granite tag
highway=pedestrian material=granite ?
This would unblock tagging specific form taken by this materials and tagged as
I plan to:
- edit Key:material - OpenStreetMap Wiki to clarify that
material=graniteand similar is fine on roads
- create wiki pages for
surface=marbleand similar high use to describe that tags as not preferred for describing material of road/path surface (including link back to this discussion)
Would it be a good idea?
Note that above applies only to types of rocks and does not apply to some other surface tags describing materials (say,
surface=mud that is not a problem as it takes only one form or types of metal where I have not yet thought what would be a good handling of them).