How one should tag surfaces: - paved with equally sized, flat stones ( https://www.google.pl/maps/@50.061304,19.938305,3a,30y,270.75h,72.93t/data=!3m5!1e1!3m3!1sBcAaihLoEYmtOQbTnOlxWA!2e0!3e5?hl=pl ) - paved with roughly shaped stones, only partially flattened ( https://www.google.pl/maps/@50.059029,19.940113,3a,30y,276.76h,68.16t/data=!3m4!1e1!3m2!1sJiyUyJYQx9Fqv_dC1-18_A!2e0?hl=pl )
I tag in the first situation as surface=sett and in the second as surface=cobblestone. Bur according to https://wiki.openstreetmap.org/wiki/Key:surface both should be tagged as surface=cobblestone. cobblestone:flattened is mentioned (without any description). To further complicate situation it seems that both surfaces should be described as sett - see http://en.wikipedia.org/wiki/Sett_%28paving%29 Meanwhile, on taginfo - https://taginfo.openstreetmap.org/keys/surface#values : - cobblestone 119 216 - sett 6 261 - cobblestone:flattened 2 176 Cobblestones, sett mistaken for cobblestone and flat sett are clearly different and I hope for way to differentiate between these, better than using smoothness.
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