23 lines
495 B
Go
23 lines
495 B
Go
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package utils
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import "math"
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func Haversine(lat1, lon1, lat2, lon2 float64) float64 {
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// Radius of the Earth in kilometers
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R := 6371.0
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lat1 = lat1 * math.Pi / 180
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lon1 = lon1 * math.Pi / 180
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lat2 = lat2 * math.Pi / 180
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lon2 = lon2 * math.Pi / 180
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dlat := lat2 - lat1
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dlon := lon2 - lon1
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a := math.Sin(dlat/2)*math.Sin(dlat/2) + math.Cos(lat1)*math.Cos(lat2)*math.Sin(dlon/2)*math.Sin(dlon/2)
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c := 2 * math.Atan2(math.Sqrt(a), math.Sqrt(1-a))
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distance := R * c
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return distance
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}
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