[Tagging] landform promontory

Warin 61sundowner at gmail.com
Thu Oct 4 00:42:27 UTC 2018

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.

Node 5946074161 https://www.openstreetmap.org/node/5946074161
node 5950099862 
This does have a named ridge leading to it

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 <61sundowner at gmail.com 
> <mailto:61sundowner at gmail.com>> 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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