山脊线【ridge line】指的是沿山脊走向布设的路线。山脊的最高棱线称为山脊线，山脊线等高线表现为一凸向低处的曲线。 山脊线就是大体上沿分水岭布设的路线。
n. crest line
misc. ridge line
各种风景中充满了线形的元素——小路，火车轨，栅栏，山脊线，树枝等。
Landscapes are full of linear elements— roadways, train tracks, fencerows, ridgelines, tree branches.
厚重的浓雾弥漫于山脊线，露头的岩层上还垒着喜鹊窝，间歇的山泉水喷洒在岩石之上。
Pockets of thick fog get trapped along the ridgelines, magpies nest among the outcrops, and springs intermittently spray over the rocks.
最后，将山脊线或山谷线“雏形”中封闭的三角形断开，并剔除过短的山脊线和山谷线。
Finally, the closed triangles in ridge and valley axes are broken and the short branches are removed.
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