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词汇 Topographic prominence
分类 英语词汇 英语翻译词典
释义

Topographic prominence

中文百科

地形突起度

地形突起度的示意图。在一个独立的大陆或海岛上，实线所标示的是该山峰的突起度（P），即到达更高点所需下降的最小高度。虚线则是山顶到母峰所需经过的主鞍部（Key col）平面。如果突起度等同于海拔，那么这座山峰就是大陆或岛上的最高点（如最右的山峰）。

地形突起度（topographic prominence）指一座山峰高于其周围不包围更高山峰的最低等高线的高度，用以衡量山峰的独立性。

地形突起度1500公尺以上的山称为特独立山峰（ultra prominent peak），世界上大约有1,515座。

英语百科

Topographic prominence 地形突起度

Figure 1. Vertical arrows show the topographic prominence of three peaks on an island. The dashed horizontal lines show the lowest contours that do not encircle higher peaks. Curved arrows point from a peak to its parent.
Topographic prominence of three peaks near Great Pond Mountain, Maine, USA. Red triangles mark the peaks, the lowest contour line encircling each peak are shown in black and the green dots mark the key cols. The prominences are Atkins Hill: 430 – 310 = 120 ft, Cave Hill: 570 - 530 = 40 ft, Mead Mountain: 671 - 530 = 141 ft. The parent peak of each peak is Great Pond Mountain.
Figure 2. Showing two closed contour lines meeting at Peak A's key col.
Figure 3. Diagram of a mountain range showing peaks and cols, from which mountain parentage and prominences can be determined.

In topography, prominence characterizes the height of a mountain or hill's summit by the vertical distance between it and 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 is a unique point on this contour line and the parent peak is some higher mountain, selected according to various objective criteria.
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