[Talk-GB] Cliff editing

[Tom Crocker]

Hi Keith.

My understanding (and practice) is to map the top of the cliff edge. You
can then add an area of natural=bare_rock if the cliff is a slab and
extends out 'beneath' the top edge (of course, there may also be flat bare
rock along the top edge and perhaps at the bottom).
The wiki recommends path=climbing_access for dedicated crag access, used
1188 times apparently without additional tags (e.g. highway=path):
https://taginfo.openstreetmap.org/tags/path=climbing_access#overview
Personally I would just add them as footways if their placement seems
reasonably stable (with additional tags as appropriate).
You can add the starting point of each route with climbing_route=bottom
https://wiki.openstreetmap.org/wiki/Climbing although I haven't done this
as I am unsure about the appropriateness of any source of names.

P.S. I know of no good way of dealing with overhangs regarding natural=* or
paths (possibly use of covered for paths, or later?)

Cheers

Tom Crocker

On Mon, 22 Aug 2022, 11:51 Keith, <keith at fachwen.org> wrote:

> I’m interested in adding missing rock-climbing cliffs here in Snowdonia.
> There are lots 🙂
>
> Mostly obscure little ones, that can be quite a challenge to find when
> walking to visit for the first time due to bracken, no real path, etc.
>
> Just checking … should the line of the cliff be at the top of the edge of
> the cliff, or at the bottom where rock-climbers naturally want to be
> setting up kit, etc.
>
> As a climber, the need is to know where to walk to, best place for
> setting-up, etc.
>
> As an OSM mapper, maybe the issue is ‘where is the crag edge?’ ie the
> dangerous bit for walkers, general public, etc.
>
> Most existing crags seem to be mapped somewhere in ’the middle’ of the
> cliff, as a line of nodes, or the actual top edge.
>
> One ‘best practice’ might be to map the top edge of the actual cliff, and
> survey the path to where climbers mostly go to park their rucksacks, etc
>
> Thanks.
>
>
> _________________________________________________________________________
>
> Keith Robertson, Tyn y Pwll, Fachwen, Caernarfon, Gwynedd, North Wales, UK
> LL55 3HD
>
> keith at fachwen.org - www.fachwen.org
>
> Text or Voice: 07515 966 558
> twitter: @keithrobertson
> www.flickr.com/photos/fachwen/sets
>
>
> BE GREEN! Read from the screen.
>
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