On Sun, Oct 7, 2018 at 11:56 PM Joseph Eisenberg <joseph.eisenb...@gmail.com> wrote:
> A collapsed cave on land is a sinkhole. Is that not appropriate? > The wiki for natural=sinkhole seems to imply it is for any type of sinkhole, however formed. But the wiki for sinkhole=* doesn't have anything that precisely matches this, although sinkhole=pit might do. The natural=cliff idea is also sensible and correct for the edge of the hole > In this case, I think so. I watched a youtube video of somebody walking along the footpath nearby and it gave me vertigo. :) Natural=arch on a node is a great idea for the natural bridge between the > collapsed section and the open sea. There are plenty of similar features on > rocky coasts, Eg Oregon, Baja California, and in deserts due to wind > erosion (eg Natural Arches monument in Utah) > It's not widely used and it's not documented, but it's definitely appropriate. One of the examples I found of it on an area also had layer=1 but I have my doubts about that. The sea is at sea level and the ground is at ground level, so is it layer 1 or 0? Probably best not to bother with layer. Small collapsed sea caves can become a “blowhole” if wave action causes > water to erupt up through the hole, but it doesn’t sound like this is the > case in this particular place. > You can fit quite a few kayaks in there and there's a small beach that could hold a dozen people. You might get a water eruption if there were a tsunami. That still leaves me wondering what to do with the water. It's been mapped as natural=water without specifying what type of water because there's nothing that matches. The closest is water=lagoon, but there's no barrier. I'm half-inclined to map it as the sea by tweaking the coastline: if the natural arch collapsed then it would be mapped as sea. If the natural arch collapsed and were replaced by a man-made bridge it would still be sea. It's complicated. :) -- Paul
_______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
