import { FeatureCollection, Point, GeoJsonProperties, MultiLineString } from 'geojson';

/**
 * Takes a grid {@link FeatureCollection} of {@link Point} features with z-values and an array of
 * value breaks and generates [isolines](https://en.wikipedia.org/wiki/Contour_line).
 *
 * @function
 * @param {FeatureCollection<Point>} pointGrid input points
 * @param {Array<number>} breaks values of `zProperty` where to draw isolines
 * @param {Object} [options={}] Optional parameters
 * @param {string} [options.zProperty='elevation'] the property name in `points` from which z-values will be pulled
 * @param {Object} [options.commonProperties={}] GeoJSON properties passed to ALL isolines
 * @param {Array<Object>} [options.breaksProperties=[]] GeoJSON properties passed, in order, to the correspondent isoline;
 * the breaks array will define the order in which the isolines are created
 * @returns {FeatureCollection<MultiLineString>} a FeatureCollection of {@link MultiLineString} features representing isolines
 * @example
 * // create a grid of points with random z-values in their properties
 * var extent = [0, 30, 20, 50];
 * var cellWidth = 100;
 * var pointGrid = turf.pointGrid(extent, cellWidth, {units: 'miles'});
 *
 * for (var i = 0; i < pointGrid.features.length; i++) {
 *     pointGrid.features[i].properties.temperature = Math.random() * 10;
 * }
 * var breaks = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
 *
 * var lines = turf.isolines(pointGrid, breaks, {zProperty: 'temperature'});
 *
 * //addToMap
 * var addToMap = [lines];
 */
declare function isolines(pointGrid: FeatureCollection<Point>, breaks: number[], options?: {
    zProperty?: string;
    commonProperties?: GeoJsonProperties;
    breaksProperties?: GeoJsonProperties[];
}): FeatureCollection<MultiLineString, GeoJsonProperties>;

export { isolines as default, isolines };