import { PROJJSONDefinition } from 'proj4/dist/lib/core.js';
/**
 * Provides utilities for validating EPSG codes and generating ProjJSON definitions
 * for UTM (Universal Transverse Mercator) zones.
 *
 * - The EPSG code base is set to `32700`, corresponding to the southern hemisphere zones.
 * - Valid zone numbers range from 1 to 60.
 * - Each zone spans 6° of longitude.
 */
export declare class UtmZone {
    /** EPSG code base for UTM zones in the southern hemisphere (32700). */
    private static BaseCode;
    /** The first valid UTM zone number (1). */
    private static FirstZone;
    /** The last valid UTM zone number (60). */
    private static LastZone;
    /** The longitude width of each UTM zone, in degrees (6°). */
    private static LonIncrement;
    /**
     * Determines whether the provided EPSG code corresponds
     * to a valid UTM zone in the southern hemisphere.
     *
     * @param code - The EPSG code to validate (e.g. 32705 for UTM Zone 5S).
     * @returns `true` if the code describes a valid UTM zone. Otherwise, `false`.
     */
    static isUTMZoneCode(code: number): boolean;
    /**
     * Generates a ProjJSON definition for the given UTM zone code.
     *
     * 1. Validates the EPSG code against UTM zone rules.
     * 2. Calculates the natural origin longitude and bounding box.
     * 3. Clones the ProjJSON template and overwrites various fields
     *    with values specific to the requested UTM zone.
     *
     * @param code - The EPSG code for the UTM zone (e.g. 32705 for UTM Zone 5S).
     * @returns A ProjJSON definition describing the UTM zone.
     *
     * @throws {Error} If the code does not correspond to a valid UTM zone.
     */
    static generateProjJson(code: number): PROJJSONDefinition;
}