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- W2094838860 abstract "The Central Land Surveying Bureau of China established several arcs of principal triangulation during 1932–37. Those which were completed before the outbreak of the war in July, 1937, are Nanking-Anking, Nanking-Hsüchow, Anking-Nanchang, Nanchang-Kiukiang, and Anking-Wuchang arcs. At the end of each arc, a base line was measured with invar tapes or wires and an astronomical station at which latitude, longitude, and the azimuth to an adjacent station were determined by astronomical observations. The methods used in the astronomical determinations were the same as those used by the United States Coast and Geodetic Survey, that is, latitude by the Talcott method, longitude by wireless time-signals, and azimuth by observing Polaris. The probable errors of these astronomical determinations were below ±0.″1 for determinations of latitude, ±0.″1 for determinations of longitude, and ±0.″4 for determinations of azimuths." @default.
- W2094838860 created "2016-06-24" @default.
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- W2094838860 date "1946-01-01" @default.
- W2094838860 modified "2023-10-16" @default.
- W2094838860 title "Preliminary determination of the dimension of the earth from the results of Chinese triangulation" @default.
- W2094838860 doi "https://doi.org/10.1029/tr027i005p00619" @default.
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