export interface GeohashSearchOptions {
    radius: number;
    limit?: number;
    type?: string;
    precision?: number;
}
export declare class GeohashService {
    private readonly DEFAULT_PRECISION;
    /**
     * Generate geohash for coordinates
     */
    generateGeohash(lat: number, lng: number, precision?: number): string;
    /**
     * Get neighboring geohashes for a given geohash
     * This is crucial for boundary searches
     */
    getNeighbors(hash: string): string[];
    /**
     * Calculate geohash search ranges for a radius query
     * This minimizes the number of queries needed
     */
    getSearchRanges(lat: number, lng: number, radius: number): Array<[string, string]>;
    /**
     * Get optimal geohash precision for given radius
     */
    private getOptimalPrecision;
    /**
     * Get all geohash cells that overlap with search radius
     */
    private getSearchHashes;
    /**
     * Convert set of geohashes to efficient query ranges
     */
    private hashesToRanges;
    /**
     * Check if two geohashes are consecutive
     */
    private areConsecutive;
    /**
     * Calculate distance between two points
     */
    private haversineDistance;
    /**
     * Get cell size for precision level
     */
    private getCellSize;
}