On 04/10/18 09:40, Joseph Eisenberg wrote:
Where are these features located?
Inland. Not near the sea.
For the same reason you would not tag a cape as a ridge or a peak you
would not tag a promontory as a ridge or a peak.
Not all ridges end as a promontory - some have gradual slopes. Not all
promontory are a peak, they may have a line at about the same height
leading away from them.
They are named as 'point' here but the closest in wikipedia I could find
is promontory. So I used that term.
Sample?
Node 5946074161 https://www.openstreetmap.org/node/5946074161
node 5950099862
https://www.openstreetmap.org/node/5950099862#map=19/-33.59309/150.55939
This does have a named ridge leading to it
https://www.openstreetmap.org/way/630058012
Perhaps 'cape' should be dropped in favour of promontory as that could
be used for both land and sea? :)
I haven't seen anything called a "promontory" in the western USA: we
would call these features ridges or cliffs if they are hills or
mountains above lower land, or if they are surrounded by water they
would be a headland, peninsula, cape, or "point".
In OSM, there is already a tag for natural=cape, and the wiki page
suggests it can be used for all water promontories:
"Cape <http://en.wikipedia.org/wiki/en:Cape_%28geography%29> - a
prominent, elevated piece of land sticking out into the sea or large
lake. Includes capes, heads, headlands, peninsulas and (water)
promontories."
https://wiki.openstreetmap.org/wiki/Tag:natural%3Dcape - used 11,000
times.
"Natural=*" is perfect in this case, because headlands/capes are
natural features formed by geological processes and natural erosion.
So if you are tagging "promontories" that project into a lake or sea,
then use natural=cape on a point.
If you are tagging hills or mountains on land, use natural=ridge as a
way along the center of the ridge in most cases.
You can also add natural=peak to a node, if there is a local high
point that is named.
"Natural=*" is also totally appropriate in this case; ridges and peaks
are also formed by natural geological and meteorological processes, no?
I've been meaning to ask the folks at OpenStreetMap Carto to start
rendering the names of ridges as a name label, so that mappers will
not be tempted to add place=locality or natural=peak when the named
feature is really a ridge.
Thanks!
Joseph
On Thu, Oct 4, 2018 at 8:20 AM Warin <[email protected]
<mailto:[email protected]>> wrote:
Hi,
There is not a tag for the land form 'promontory' meaning a raised
mass
of land projecting into a low land or water body.
See https://en.wikipedia.org/wiki/Promontory
I have come across them as named 'points' and have been tagging a
few of
them as place=locality for lack of something better.
The nearest thing is natural=cape, but that only applies to sea
retaliated things and I don't like the key 'natural' as it applies to
both 'natural' and 'unnatural' thing making a nonsense of the word.
So I think the best tag would be landform=promontory.
Other ideas?
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