HARMONIC PLANE

harmonic plane

harmonic plane 〈美〉一致线 商务部美国海岸与大地调查〔United States Coast and Geodetic Survey of the Department of Commerce〕所确认的零点基线,潮汐表、航海图、地图等均以此为基础。它是任意性的一条线〔arbitrary plane〕,在皮吉特湾〔Puget Sound〕,它是该部所认可的最低潮汐线。

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