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- import { Feature, Polygon } from 'geojson';
- import { Coord } from '@turf/helpers';
- /**
- * Takes a triangular plane as a polygon and a point within that triangle, and
- * returns the z-value at that point.
- *
- * The Polygon should have properties `a`, `b`, and `c`
- * that define the values at its three corners. Alternatively, the z-values
- * of each triangle point can be provided by their respective 3rd coordinate
- * if their values are not provided as properties.
- *
- * @function
- * @param {Coord} point the Point for which a z-value will be calculated
- * @param {Feature<Polygon>} triangle a Polygon feature with three vertices
- * @returns {number} the z-value for `interpolatedPoint`
- * @example
- * const point = turf.point([-75.3221, 39.529]);
- * // "a", "b", and "c" values represent the values of the coordinates in order.
- * const triangle = turf.polygon([[
- * [-75.1221, 39.57],
- * [-75.58, 39.18],
- * [-75.97, 39.86],
- * [-75.1221, 39.57]
- * ]], {
- * "a": 11,
- * "b": 122,
- * "c": 44
- * });
- *
- * const zValue = turf.planepoint(point, triangle);
- * point.properties.zValue = zValue;
- *
- * //addToMap
- * const addToMap = [triangle, point];
- */
- declare function planepoint(point: Coord, triangle: Feature<Polygon> | Polygon): number;
- export { planepoint as default, planepoint };
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