import * as L from 'leaflet';
import type { Feature, Polygon, MultiPolygon } from 'geojson';
/**
 * Utility class for polygon calculations.
 */
export declare class PolygonUtil {
    private static turfHelper;
    /**
     * Calculates the center of the polygon.
     * @param polygon Array of LatLng points.
     * @returns The center LatLng.
     */
    static getCenter(polygon: L.LatLngLiteral[]): L.LatLngLiteral;
    /**
     * Gets the southwest point of the polygon bounds.
     * @param polygon Array of LatLng points.
     * @returns The southwest LatLng.
     */
    static getSouthWest(polygon: L.LatLngLiteral[]): L.LatLngLiteral;
    static getNorthEast(polygon: L.LatLngLiteral[]): L.LatLngLiteral;
    static getNorthWest(polygon: L.LatLngLiteral[]): L.LatLngLiteral;
    static getSouthEast(polygon: L.LatLngLiteral[]): L.LatLngLiteral;
    static getNorth(polygon: L.LatLngLiteral[]): number;
    static getSouth(polygon: L.LatLngLiteral[]): number;
    static getWest(polygon: L.LatLngLiteral[]): number;
    static getEast(polygon: L.LatLngLiteral[]): number;
    static getSqmArea(polygon: L.LatLngLiteral[]): number;
    static getPerimeter(polygon: L.LatLngLiteral[]): number;
    static getPolygonChecksum(polygon: L.LatLngLiteral[]): number;
    static getMidPoint(point1: L.LatLngLiteral, point2: L.LatLngLiteral): L.LatLngLiteral;
    static getBounds(polygon: L.LatLngLiteral[]): L.LatLngBounds;
    /**
     * Calculates the center of mass of the polygon.
     * @param polygon A GeoJSON polygon.
     * @returns The center LatLng.
     */
    static getCenterOfMass(polygon: Feature<Polygon | MultiPolygon>): L.LatLngLiteral;
    static getCenterOfPolygonByIndexWithOffsetFromCenterOfMass(polygon: Feature<Polygon | MultiPolygon>, index: number): L.LatLngLiteral;
    private static getPolygonLatLngAtIndex;
}
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