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。
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。
harmonic plane. An arbitrarily selected zero chosen by the U.S. Coast and Geodetic Survey to serve as the base for its tidal tables, charts, and maps.