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export default class DistanceCalculator { /** * @param {number} lat1 * @param {number} lon1 * @param {number} lat2 * @param {number} lon2 * @returns {number} */ static getDistanceFromLatLonInKm(lat1: number, lon1: number, lat2: number, lon2: number): number { const R = 6371; // Radius of the earth in km const dLat = DistanceCalculator.deg2rad(lat2 - lat1); const dLon = DistanceCalculator.deg2rad(lon2 - lon1); const a = Math.sin(dLat / 2) * Math.sin(dLat / 2) + Math.cos(DistanceCalculator.deg2rad(lat1)) * Math.cos(DistanceCalculator.deg2rad(lat2)) * Math.sin(dLon / 2) * Math.sin(dLon / 2); const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a)); return R * c; } /** * @param {number} deg * @returns {number} */ static deg2rad(deg: number): number { return deg * (Math.PI / 180); } }
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