import { Feature, LineString, Polygon } from "geojson";
import { CartesianPoint } from "../common";
/**
 * Calculates the centroid of a GeoJSON Polygon or LineString in Web Mercator

 * @param {Feature<Polygon | LineString>} feature - The GeoJSON Feature containing either a Polygon or LineString
 * @returns {{ x: number, y: number }} The centroid of the polygon or line string in Web Mercator coordinates.
 */
export declare function webMercatorCentroid(feature: Feature<Polygon | LineString>): CartesianPoint;