Topographic prominence

In topography, prominence (also referred to as autonomous height, relative height, and shoulder drop in US English, and drop or relative height in British English) measures the height of a mountain or hill's summit relative to the lowest contour line encircling it but containing no higher summit within it. It is a measure of the independence of a summit. A peak's key col (the highest col surrounding the peak) is a unique point on this contour line and the parent peak is some higher mountain, selected according to various criteria.

Contrast between topographic isolation and prominence

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