/**
 * Utility functions for calculating distances between coordinates
 */
/**
 * Calculate the great-circle distance between two points on Earth using the Haversine formula
 * @param lat1 Latitude of first point in degrees
 * @param lon1 Longitude of first point in degrees
 * @param lat2 Latitude of second point in degrees
 * @param lon2 Longitude of second point in degrees
 * @returns Distance in kilometers
 */
export declare function calculateDistance(lat1: number, lon1: number, lat2: number, lon2: number): number;
/**
 * Convert kilometers to miles
 * @param km Distance in kilometers
 * @returns Distance in miles
 */
export declare function kmToMiles(km: number): number;
/**
 * Convert miles to kilometers
 * @param miles Distance in miles
 * @returns Distance in kilometers
 */
export declare function milesToKm(miles: number): number;
/** Initial bearing from one point to another, in degrees clockwise from north. */
export declare function bearingDegrees(lat1: number, lon1: number, lat2: number, lon2: number): number;
/** Reduce a bearing to one of eight compass points. */
export declare function compassPoint(degrees: number): string;
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