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JTS.orthodromicDistance(new Coordinate(0,0), new Coordinate(180,0), DefaultGeographicCRS.WGS84) * 2 等于 40075016 但必须等于 6378000。
你得到你所要求的。您的公式计算周长,即2*pi*radius。
2*pi*radius
半径circumference / (2*pi)确实是 6378000 左右。
circumference / (2*pi)