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- import { FeatureCollection, Point, Polygon } from "@turf/helpers";
- export interface Pt {
- x: number;
- y: number;
- z?: number;
- __sentinel?: boolean;
- }
- export interface Vertice {
- x: number;
- y: number;
- }
- /**
- * Takes a set of {@link Point|points} and creates a
- * [Triangulated Irregular Network](http://en.wikipedia.org/wiki/Triangulated_irregular_network),
- * or a TIN for short, returned as a collection of Polygons. These are often used
- * for developing elevation contour maps or stepped heat visualizations.
- *
- * If an optional z-value property is provided then it is added as properties called `a`, `b`,
- * and `c` representing its value at each of the points that represent the corners of the
- * triangle.
- *
- * @name tin
- * @param {FeatureCollection<Point>} points input points
- * @param {String} [z] name of the property from which to pull z values
- * This is optional: if not given, then there will be no extra data added to the derived triangles.
- * @returns {FeatureCollection<Polygon>} TIN output
- * @example
- * // generate some random point data
- * var points = turf.randomPoint(30, {bbox: [50, 30, 70, 50]});
- *
- * // add a random property to each point between 0 and 9
- * for (var i = 0; i < points.features.length; i++) {
- * points.features[i].properties.z = ~~(Math.random() * 9);
- * }
- * var tin = turf.tin(points, 'z');
- *
- * //addToMap
- * var addToMap = [tin, points]
- * for (var i = 0; i < tin.features.length; i++) {
- * var properties = tin.features[i].properties;
- * properties.fill = '#' + properties.a + properties.b + properties.c;
- * }
- */
- export default function tin(points: FeatureCollection<Point, any>, z?: string): FeatureCollection<Polygon>;
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