This spheroid undoubtedly represents very closely the true size and shape of the earth, and is the one to which nearly all geodetic work in the United States is now referred. The values of the constants are as follows : a, semi-major axis = 20926062 feet...
Formulas and Tables to Facilitate the Construction and Use of Maps - Page 7
de Robert Simpson Woodward - 1889 - 124 pages
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