26 lines
739 B
TypeScript
26 lines
739 B
TypeScript
import {Injectable} from '@angular/core';
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@Injectable({
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providedIn: 'root'
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})
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export class CalculateDistanceService{
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getDistanceBetweenCoordinates(lat1: number, lon1: number, lat2: number, lon2: number) {
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const earthRadius = 6371; // Radius of the earth in km
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const dLat = this.deg2rad(lat2 - lat1); // deg2rad below
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const dLon = this.deg2rad(lon2 - lon1);
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const a =
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Math.sin(dLat / 2) * Math.sin(dLat / 2) +
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Math.cos(this.deg2rad(lat1)) * Math.cos(this.deg2rad(lat2)) *
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Math.sin(dLon / 2) * Math.sin(dLon / 2)
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;
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const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
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// Distance in km
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return earthRadius * c;
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}
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deg2rad(deg: number) {
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return deg * (Math.PI / 180)
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}
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}
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