the peak is a unique point on this contour line and the parent peak (if any) is some higher mountain, selected according to various criteria.

Definitions

The prominence of a peak is the least drop in height necessary in order to get from the summit to any higher terrain. This can be calculated for a given peak in the following manner: for every path connecting the peak to higher terrain, find the lowest point on the path; the key col (or highest saddle,

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