import type { Root } from "@tmcw/togeojson";
import type { FeatureCollection, Geometry } from "geojson";
/**
 * Convert nested folder structure to KML. This expects
 * input that follows the same patterns as [toGeoJSON](https://github.com/placemark/togeojson)'s
 * kmlWithFolders method: a tree of folders and features,
 * starting with a root element.
 */
export declare function foldersToKML(root: Root): string;
/**
 * Convert a GeoJSON FeatureCollection to a string of
 * KML data.
 */
export declare function toKML(featureCollection: FeatureCollection<Geometry | null>): string;