import { Feature, Point, GeoJsonProperties, Position, LineString, MultiLineString } from 'geojson';

/**
 * Calculate great circles routes as {@link LineString} or {@link MultiLineString}.
 * If the `start` and `end` points span the antimeridian, the resulting feature will
 * be split into a `MultiLineString`. If the `start` and `end` positions are the same
 * then a `LineString` will be returned with duplicate coordinates the length of the `npoints` option.
 *
 * @name greatCircle
 * @param {Coord} start source point feature
 * @param {Coord} end destination point feature
 * @param {Object} [options={}] Optional parameters
 * @param {Object} [options.properties={}] line feature properties
 * @param {number} [options.npoints=100] number of points
 * @param {number} [options.offset=10] offset controls the likelyhood that lines will
 * be split which cross the dateline. The higher the number the more likely.
 * @returns {Feature<LineString | MultiLineString>} great circle line feature
 * @example
 * var start = turf.point([-122, 48]);
 * var end = turf.point([-77, 39]);
 *
 * var greatCircle = turf.greatCircle(start, end, {properties: {name: 'Seattle to DC'}});
 *
 * //addToMap
 * var addToMap = [start, end, greatCircle]
 */
declare function greatCircle(start: Feature<Point, GeoJsonProperties> | Point | Position, end: Feature<Point, GeoJsonProperties> | Point | Position, options?: {
    properties?: GeoJsonProperties;
    npoints?: number;
    offset?: number;
}): Feature<LineString | MultiLineString>;

export { greatCircle as default, greatCircle };