<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<p><br>
</p>
<div class="moz-cite-prefix">On 22/8/22 21:16, Tom Crocker wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAHmUbmfxJHfTCWRqyWJG=YWC04MwOppeydwjU2B5m_H+sYKtNw@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="auto">Hi Keith.
<div dir="auto"><br>
</div>
<div dir="auto">My understanding (and practice) is to map the
top of the cliff edge. </div>
</div>
</blockquote>
<p><br>
</p>
<p>Agree, top edge it what to map. This is the practice in other
maps. The direction of the way gives the falling direction - right
hand side (facing the forwards direction) is the fall. <br>
</p>
<p><br>
</p>
<p>From <a class="moz-txt-link-freetext" href="https://en.wikipedia.org/wiki/Cliff">https://en.wikipedia.org/wiki/Cliff</a><br>
</p>
<p>"The <a href="https://en.wikipedia.org/wiki/Ordnance_Survey"
title="Ordnance Survey">Ordnance Survey</a> distinguishes
between around most cliffs (continuous line along the topper edge
with projections down the face)"</p>
<p><br>
</p>
<blockquote type="cite"
cite="mid:CAHmUbmfxJHfTCWRqyWJG=YWC04MwOppeydwjU2B5m_H+sYKtNw@mail.gmail.com">
<div dir="auto">
<div dir="auto">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). <br>
</div>
</div>
</blockquote>
Also scree, sometimes at the bottom of a cliff. <br>
<blockquote type="cite"
cite="mid:CAHmUbmfxJHfTCWRqyWJG=YWC04MwOppeydwjU2B5m_H+sYKtNw@mail.gmail.com">
<div dir="auto">
<div dir="auto">The wiki recommends path=climbing_access for
dedicated crag access, used 1188 times apparently without
additional tags (e.g. highway=path): <a
href="https://taginfo.openstreetmap.org/tags/path=climbing_access#overview"
moz-do-not-send="true" class="moz-txt-link-freetext">https://taginfo.openstreetmap.org/tags/path=climbing_access#overview</a> </div>
<div dir="auto">Personally I would just add them as footways if
their placement seems reasonably stable (with additional tags
as appropriate). </div>
<div dir="auto">You can add the starting point of each route
with climbing_route=bottom <a
href="https://wiki.openstreetmap.org/wiki/Climbing"
moz-do-not-send="true" class="moz-txt-link-freetext">https://wiki.openstreetmap.org/wiki/Climbing</a>
although I haven't done this as I am unsure about the
appropriateness of any source of names.</div>
<div dir="auto"><br>
</div>
<div dir="auto">P.S. I know of no good way of dealing with
overhangs regarding natural=* or paths (possibly use of
covered for paths, or later?)</div>
</div>
</blockquote>
I have used covered. <br>
<blockquote type="cite"
cite="mid:CAHmUbmfxJHfTCWRqyWJG=YWC04MwOppeydwjU2B5m_H+sYKtNw@mail.gmail.com">
<div dir="auto">
<div dir="auto"><br>
</div>
<div dir="auto">Cheers</div>
<div dir="auto"><br>
</div>
<div dir="auto">Tom Crocker</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, 22 Aug 2022, 11:51
Keith, <<a href="mailto:keith@fachwen.org"
moz-do-not-send="true" class="moz-txt-link-freetext">keith@fachwen.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="word-wrap:break-word;line-break:after-white-space">I’m
interested in adding missing rock-climbing cliffs here in
Snowdonia. There are lots 🙂
<div><br>
</div>
<div>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.
<div><br>
</div>
<div>
<div>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.</div>
<div><br>
</div>
<div>As a climber, the need is to know where to walk to,
best place for setting-up, etc. </div>
<div><br>
</div>
<div>As an OSM mapper, maybe the issue is ‘where is the
crag edge?’ ie the dangerous bit for walkers, general
public, etc. </div>
<div><br>
</div>
<div>Most existing crags seem to be mapped somewhere in
’the middle’ of the cliff, as a line of nodes, or the
actual top edge. </div>
<div><br>
</div>
<div>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</div>
<div><br>
</div>
<div>Thanks.</div>
<div><br>
</div>
<div><br>
<div>
<div
style="color:rgb(0,0,0);font-family:Helvetica;font-size:18px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><span
style="font-size:12px">_________________________________________________________________________</span></div>
<div
style="color:rgb(0,0,0);font-family:Helvetica;font-size:18px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none">
<div
style="margin:0px;font-variant-ligatures:normal;font-variant-east-asian:normal;line-height:normal;min-height:14px;font-family:Monaco;font-size:10px"><br>
</div>
<div style="font-size:12px;margin:0px">Keith
Robertson, Tyn y Pwll, Fachwen, Caernarfon,
Gwynedd, North Wales, UK LL55 3HD</div>
<div
style="margin:0px;font-variant-ligatures:normal;font-variant-east-asian:normal;line-height:normal;min-height:14px;font-family:Monaco;font-size:10px"><br>
</div>
<div style="font-size:12px;margin:0px"><a
href="mailto:keith@fachwen.org"
target="_blank" rel="noreferrer"
moz-do-not-send="true"
class="moz-txt-link-freetext">keith@fachwen.org</a>
- <a href="http://www.fachwen.org"
target="_blank" rel="noreferrer"
moz-do-not-send="true">www.fachwen.org</a></div>
<div style="font-size:12px;margin:0px"><br>
</div>
<div style="font-size:12px;margin:0px">Text or
Voice: 07515 966 558</div>
<div style="font-size:12px;margin:0px">twitter:
@keithrobertson</div>
<div style="font-size:12px;margin:0px"><a
href="http://www.flickr.com/photos/fachwen/sets"
target="_blank" rel="noreferrer"
moz-do-not-send="true">www.flickr.com/photos/fachwen/sets</a></div>
</div>
<br
style="color:rgb(0,0,0);font-family:Helvetica;font-size:18px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none">
<span
style="color:rgb(0,0,0);font-family:Helvetica;font-size:18px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><span><span
style="font-family:Helvetica;font-size:18px;font-weight:normal;font-style:normal"><span><img
id="m_-70007473409866770838565F470-22E8-4EBB-B0A6-1A545550FA82"
src="cid:image001.png@01D3D566.A8CB90D0"
moz-do-not-send="true"></span><br
style="color:rgb(0,0,0);font-family:Helvetica;font-size:18px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none">
<font
style="font-family:Helvetica;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;font-size:12px"
color="#7fb983">BE GREEN! Read from the
screen.</font></span></span></span></div>
<br>
</div>
</div>
</div>
</div>
_______________________________________________<br>
Talk-GB mailing list<br>
<a href="mailto:Talk-GB@openstreetmap.org" target="_blank"
rel="noreferrer" moz-do-not-send="true"
class="moz-txt-link-freetext">Talk-GB@openstreetmap.org</a><br>
<a href="https://lists.openstreetmap.org/listinfo/talk-gb"
rel="noreferrer noreferrer" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">https://lists.openstreetmap.org/listinfo/talk-gb</a><br>
</blockquote>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
Talk-GB mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Talk-GB@openstreetmap.org">Talk-GB@openstreetmap.org</a>
<a class="moz-txt-link-freetext" href="https://lists.openstreetmap.org/listinfo/talk-gb">https://lists.openstreetmap.org/listinfo/talk-gb</a>
</pre>
</blockquote>
</body>
</html>