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Fixed formula

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Delta lambda must not be converted to radians, because it's already in radians
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Dima Rostopira 2017-07-12 11:15:11 +03:00 • committed by GitHub
parent bba7bfd280
commit 1604d4e1b6
1 changed files with 1 additions and 1 deletions
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2
Task/Haversine-formula/Kotlin/haversine-formula.kotlin
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@ -7,7 +7,7 @@ const val R = 6372.8 // in kilometers
fun haversine(lat1: Double, lon1: Double, lat2: Double, lon2: Double): Double {
val λ1 = toRadians(lat1)
val λ2 = toRadians(lat2)
val Δλ = toRadians(λ2 - λ1)
val Δλ = λ2 - λ1
val Δφ = toRadians(lon2 - lon1)
return 2 * R * asin(sqrt(pow(sin(Δλ / 2), 2.0) + pow(sin(Δφ / 2), 2.0) * cos(λ1) * cos(λ2)))
}