A few months ago we discussed how to tag gorges, canyons and ravines. These are steep-sided valleys, sometimes with cliffs.
Myself and at least one other person were in favor of using natural=valley, + valley=ravine / valley=gorge / valley=canyon. However, there is already a non-English wiki page for natural=canyon, and a new English page for natural=gorge - the author of the gorge page thought that he would like a single tag, rather than a secondary tag with natural=valley. This would be a little more work for database users, and also you would have to pick natural=valley vs =gorge/canyon/etc. Also, Wikipedia basically says ravine, gorge and canyon are synonyms, though as an American from the West, I tend to think of canyons as having vertical, rock cliffs, vs ravines and gorges as less steep, but this may be a dialectal difference. Thoughts on this? -Joseph
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