Compares between two coordinates (long & lat)

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Fri Nov 18 2022 19:05:15 GMT+0000 (Coordinated Universal Time)

function degreesToRadians(degrees) {
  return (degrees * Math.PI) / 180
}

function distanceInKmBetweenEarthCoordinates(lat1, lon1, lat2, lon2) {
  const earthRadiusKm = 6371

  const dLat = degreesToRadians(lat2 - lat1)
  const dLon = degreesToRadians(lon2 - lon1)

  lat1 = degreesToRadians(lat1)
  lat2 = degreesToRadians(lat2)

  let a =
    Math.sin(dLat / 2) * Math.sin(dLat / 2) +
    Math.sin(dLon / 2) * Math.sin(dLon / 2) * Math.cos(lat1) * Math.cos(lat2)
  let c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a))
  return earthRadiusKm * c
}

console.log(
  distanceInKmBetweenEarthCoordinates(
    6.5361348,
    3.3913253,
    6.5362509,
    3.3913711
  )
)

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Compares between two coordinates (long & lat)

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