import { ZipCodeInfo, RawZipData } from "./types.js";
/**
 * Parses a line from the GeoNames US.txt file
 * @param line A tab-separated line from the data file
 * @returns Parsed ZIP code data object
 */
export declare function parseLine(line: string): RawZipData | null;
/**
 * Converts raw data to the public ZipCodeInfo format
 * @param rawData Raw data from the parsed file
 * @returns Clean ZipCodeInfo object for public use
 */
export declare function toZipCodeInfo(rawData: RawZipData): ZipCodeInfo;
/**
 * Loads ZIP code data - works in both browser and Node environments
 * @returns Map of ZIP codes to their information
 */
export declare function loadZipCodeData(): Map<string, ZipCodeInfo>;