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33 lines
1.2 KiB
JavaScript
33 lines
1.2 KiB
JavaScript
/*
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Calculate the distance between two coordinates using the haversine formula
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More about: https://pt.wikipedia.org/wiki/F%C3%B3rmula_de_Haversine
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@Param {number} latitude1
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@Param {number} latitude2
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@Param {number} longitude1
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@Param {number} longitude2
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*/
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const haversineDistance = (latitude1 = 0, longitude1 = 0, latitude2 = 0, longitude2 = 0) => {
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validateLatOrLong(latitude1)
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validateLatOrLong(latitude2)
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validateLatOrLong(longitude1)
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validateLatOrLong(longitude2)
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const earthRadius = 6371e3 // 6,371km
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const pi = Math.PI
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const cos1 = latitude1 * pi / 180.0
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const cos2 = latitude2 * pi / 180.0
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const deltaLatitude = (latitude2 - latitude1) * pi / 180.0
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const deltaLongitude = (longitude2 - longitude1) * pi / 180.0
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const alpha = Math.sin(deltaLatitude / 2) * Math.sin(deltaLatitude / 2) + Math.cos(cos1) * Math.cos(cos2) * Math.sin(deltaLongitude / 2) * Math.sin(deltaLongitude / 2)
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const constant = 2 * Math.atan2(Math.sqrt(alpha), Math.sqrt(1 - alpha))
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return earthRadius * constant
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}
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const validateLatOrLong = value => {
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if (typeof value !== 'number') {
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throw new TypeError('The value of latitude or longitude should be a number')
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}
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}
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export { haversineDistance }
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