import { Coord, Units } from '@turf/helpers';
import { GeoJsonProperties, Feature, Polygon } from 'geojson';

/**
 * Takes a {@link Point} and calculates the ellipse polygon given two semi-axes expressed in variable units and steps for precision.
 *
 * @param {Coord} center center point
 * @param {number} xSemiAxis semi (major) axis of the ellipse along the x-axis
 * @param {number} ySemiAxis semi (minor) axis of the ellipse along the y-axis
 * @param {Object} [options={}] Optional parameters
 * @param {number} [options.angle=0] angle of rotation in decimal degrees, positive clockwise
 * @param {Coord} [options.pivot=center] point around which any rotation will be performed
 * @param {number} [options.steps=64] number of steps
 * @param {string} [options.units='kilometers'] unit of measurement for axes
 * @param {Object} [options.properties={}] properties
 * @returns {Feature<Polygon>} ellipse polygon
 * @example
 * var center = [-75, 40];
 * var xSemiAxis = 5;
 * var ySemiAxis = 2;
 * var ellipse = turf.ellipse(center, xSemiAxis, ySemiAxis);
 *
 * //addToMap
 * var addToMap = [turf.point(center), ellipse]
 */
declare function ellipse(center: Coord, xSemiAxis: number, ySemiAxis: number, options: {
    steps?: number;
    units?: Units;
    angle?: number;
    pivot?: Coord;
    properties?: GeoJsonProperties;
}): Feature<Polygon>;

export { ellipse as default, ellipse };