Tag:natural=hill

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Public-images-osm logo.svg natural = hill
Rolling Hills Paranal.jpg
Description
A less prominent peak
Used on these elements
may be used on nodesuse on ways unspecifieduse on areas unspecifieduse on relations unspecified
Useful combination
Wikidata
Status: in use

A hill is a piece of land that rises higher than everything surrounding it, like a peak.

Simply put, not all mountain summits are peaks. The less prominent ones are hills.

Differentiating

Compared to a natural=peak, a natural=hill a is less prominent, but like a natural=peak, a hill has an obvious summit and might be a part of a series of summits. The highest in the range of summits would be a natural=peak, and the lower, less prominent ones might be natural=hills.

The difference between natural=hill and natural=peak is not clear, and the classification might be contended.

One used differentiator is the height (ele=*), but this is probably not be a good way to separate them. The same goes for the steepness of the hill, the geological formation method and vegetation.

A clear way to separate hills from peaks is Topographic prominence. How prominent one peak is from the next. The Wikipedia page prominence Topographic_prominence has a detailed explanation of how hills and peaks are classified by using topographic prominence.

Using this method it is possible to separate the two.


Consensus on tagging

Only a small number of features hills have been mapped, compared to natural=peak and tagging has not settled on a consensus.

Tagging mistakes

Many natural=peak should probably be natural=hill, but differentiating these might be difficult.