11 lines
351 B
Go
11 lines
351 B
Go
package calculator
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// WGS84 ellipsoid constants
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const (
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EarthRadius = 6378137.0 // 地球半径，单位米
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a = 6378137.0 // semi-major axis in meters
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f = 1 / 298.257223563 // flattening
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e2 = 2*f - f*f // square of eccentricity
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J2000Epoch = 2451545.0 // Julian date of J2000 epoch
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)
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