Tim Miller wrote:
Stephen Osborn wrote:

I am still not convinced you will find a natural cliff that is *truly*
vertical (e.g. measured by a plumb line) for more than 10 metres, in
order to have the contour lines coincident.

I would be fascinated if you can think of an example where this is
true.


http://www.climbvertigo.ca/location-first-face.htm seems to indicate that in
places, the cliff is actually overhanging.

Tim (tm)

Yes but that is not vertical so the contour lines (of different heights)
would not be coincident.

I am struggling to get my mind around how an overhang should be shown on
an OS map.

--

regards

Stephen