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CosmoAbdon/DistanceBetweenPoints.ts

Created February 9, 2021 00:26
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Getting distance between 2 points using haversine
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DistanceBetweenPoints.ts
interface location {
latitude: number,
longitude: number,
}
const getDistanceBetweenTwoPoints = (user: location, company: location): number => {
const p = 0.017453292519943295; // PI/180 (Evitar re-cálculo)
const cos = Math.cos;
const deltaLatitude = ((company.latitude - user.latitude) * p);
const deltaLongitude = ((company.longitude - user.longitude) * p);
const sinDeltaLatitude = cos(deltaLatitude)/2;
const sinDeltaLongitude = ((1 - cos(deltaLongitude))/2);
const userRadianLatitude = cos(user.latitude * p);
const companyRadianLatitude = cos(company.latitude * p);
var a = 0.5 - sinDeltaLatitude + userRadianLatitude * companyRadianLatitude * sinDeltaLongitude;
return 12742 * Math.asin(Math.sqrt(a)); // O mesmo de fazer ((2 * RaioDaTerra) * ArcoSeno(Raiz(A))
}
// Implementação
const user: location = { latitude: -3.7404223, longitude: -38.5621739 }
const company: location = { latitude: -3.74037582700665, longitude: -38.55872191910098 }
const distance = getDistanceBetweenTwoPoints(user, company);
console.log(distance)
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