[Tagging] Elevation and height on vertical features

[Mike Thompson]

On Thu, Jan 7, 2016 at 3:40 PM, Colin Smale <colin.smale at xs4all.nl> wrote:

> Cliffs are never truly vertical. A bird's eye view from above will show
> that. If they are steep enough they could be modelled as a line, but in
> general we should allow for a polygon, with a high side and a low side.
>
Actually, sometimes they are "less than vertical", in other words,
overhanging, e.g. [1]

[1]
https://s-media-cache-ak0.pinimg.com/736x/9c/52/0e/9c520e8e1e327be4bc844b950544aac6.jpg
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