Takes a triangular plane as a polygon and a point within that triangle, and returns the z-value at that point.
npm install @turf/planepointTakes 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.
* point [Coord][1] the Point for which a z-value will be calculated
* triangle [Feature][2]<[Polygon][3]> a Polygon feature with three vertices
``javascript
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];
`
Returns [number][4] the z-value for interpolatedPoint
[1]: https://tools.ietf.org/html/rfc7946#section-3.1.1
[2]: https://tools.ietf.org/html/rfc7946#section-3.2
[3]: https://tools.ietf.org/html/rfc7946#section-3.1.6
[4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number
---
This module is part of the Turfjs project, an open source module collection dedicated to geographic algorithms. It is maintained in the Turfjs/turf repository, where you can create PRs and issues.
Install this single module individually:
`sh`
$ npm install @turf/planepoint
Or install the all-encompassing @turf/turf module that includes all modules as functions:
`sh``
$ npm install @turf/turf