@spatial/simplify

simplify

Takes a [GeoJSON][1] object and returns a simplified version. Internally uses
[simplify-js][2] to perform simplification using the Ramer-Douglas-Peucker algorithm.

$3

- geojson [GeoJSON][3] object to be simplified
- options [Object][4] Optional parameters (optional, default {})
- options.tolerance [number][5] simplification tolerance (optional, default 1)
- options.highQuality [boolean][6] whether or not to spend more time to create a higher-quality simplification with a different algorithm (optional, default false)
- options.mutate [boolean][6] allows GeoJSON input to be mutated (significant performance increase if true) (optional, default false)

$3

``javascript
var geojson = turf.polygon([[
[-70.603637, -33.399918],
[-70.614624, -33.395332],
[-70.639343, -33.392466],
[-70.659942, -33.394759],
[-70.683975, -33.404504],
[-70.697021, -33.419406],
[-70.701141, -33.434306],
[-70.700454, -33.446339],
[-70.694274, -33.458369],
[-70.682601, -33.465816],
[-70.668869, -33.472117],
[-70.646209, -33.473835],
[-70.624923, -33.472117],
[-70.609817, -33.468107],
[-70.595397, -33.458369],
[-70.587158, -33.442901],
[-70.587158, -33.426283],
[-70.590591, -33.414248],
[-70.594711, -33.406224],
[-70.603637, -33.399918]
]]);
var options = {tolerance: 0.01, highQuality: false};
var simplified = turf.simplify(geojson, options);

//addToMap
var addToMap = [geojson, simplified]
`

Returns [GeoJSON][3] a simplified GeoJSON

[1]: https://tools.ietf.org/html/rfc7946#section-3

[2]: http://mourner.github.io/simplify-js/

[3]: https://tools.ietf.org/html/rfc7946#section-3

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

[5]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number

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

---

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.

$3

Install this module individually:

`sh
$ npm install @spatial/simplify
`

Or install the Turf module that includes it as a function:

`sh
$ npm install @turf/turf
``