@turf/angle

angle

Finds the angle formed by two adjacent segments defined by 3 points. The result will be the (positive clockwise)
angle with origin on the startPoint-midPoint segment, or its explementary angle if required.

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* startPoint [Coord][1] Start Point Coordinates
* midPoint [Coord][1] Mid Point Coordinates
* endPoint [Coord][1] End Point Coordinates
* options [Object][2] Optional parameters (optional, default {})

* options.explementary [boolean][3] Returns the explementary angle instead (360 - angle) (optional, default false)
* options.mercator [boolean][3] if calculations should be performed over Mercator or WGS84 projection (optional, default false)

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``javascript
turf.angle([5, 5], [5, 6], [3, 4]);
//=45
`

Returns [number][4] Angle between the provided points, or its explementary.

[1]: https://tools.ietf.org/html/rfc7946#section-3.1.1

[2]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object

[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean

[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.

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Install this single module individually:

`sh
$ npm install @turf/angle
`

Or install the all-encompassing @turf/turf module that includes all modules as functions:

`sh
$ npm install @turf/turf
``

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!turf-angle