/// <reference types="node" />
import { MapProperties } from './types';
import { FeatureCollection, GeometryObject } from 'geojson';
/**
 * Copy labeled values to new labels to assist with map property transformation.
 */
export declare function relabel(from: Partial<MapProperties>, out: Partial<MapProperties>, labels: {
    [key: string]: string;
}): void;
export declare function load(url: string): Promise<Buffer | void>;
export declare function loadSource(key: string): Promise<FeatureCollection<GeometryObject> | null>;