地球半径等
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出典赤道半径(a)扁平率の逆数(1/f)極半径(b)赤道・極両半径の平均(r)備考
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相加平均幾何平均
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エベレスト18306377276.345300.80176356075.4136366675.8796366667.054インド
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ベッセル18416377397.155299.1528136356078.9636366738.0596366729.136旧日本測地系
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クラーク18666378206.4294.9786986356583.86367395.16367385.922旧アメリカ測地系
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改訂クラーク18806378249.145293.46636356514.9666367382.0556367372.782アフリカ各国
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国際192463783882976356911.9466367649.9736367640.919ヨーロッパ、南米各国
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クラソフスキー19406378245298.36356863.0196367554.0096367545.034旧ソ連
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IAU-6419646378160298.256356774.7196367467.366367458.382オーストラリア
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IAG-6719676378160298.2471676356774.5166367467.2586367458.28
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WGS-7219726378135298.266356750.526367442.766367433.783
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NWL-9D19736378145298.256356759.7696367452.3856367443.407
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SAO-SEⅢ19736378140298.2566356755.2166367447.6086367438.631
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IAU-7619766378140298.2576356755.2886367447.6446367438.667
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GRS-8019806378137298.2572226356752.3146367444.6576367435.68
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GRS-80(改訂)19836378136298.2576356751.3026367443.6516367434.673現世界測地系
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WGS-8419866378137298.2572236356752.3146367444.6576367435.68
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