turf-simplify

KO | EN

gitlite — search

#python #java #python3 #arduino #golang #machine-learning #rust #html #flask #javascript #seismology #nodejs

★ 12 Open GitHub ↗

simplify geographic shapes

// repository documentation

Was this content helpful?

★ 0 (0 ratings)

# turf-simplify

[![build status](https://secure.travis-ci.org/Turfjs/turf-simplify.png)](http://travis-ci.org/Turfjs/turf-simplify)

simplify geographic shapes

### `turf.simplify(feature, tolerance, highQuality)`

Takes a LineString or Polygon and returns a simplified version. Internally uses [simplify-js](http://mourner.github.io/simplify-js/) to perform simplification.

### Parameters

| parameter     | type                            | description                                                                                            |
| ------------- | ------------------------------- | ------------------------------------------------------------------------------------------------------ |
| `feature`     | Feature\.\<LineString|Polygon\> | feature to be simplified                                                                               |
| `tolerance`   | Number                          | simplification tolerance                                                                               |
| `highQuality` | Boolean                         | whether or not to spend more time to create a higher-quality simplification with a different algorithm |

### Example

```js
var feature = {
  "type": "Feature",
  "properties": {},
  "geometry": {
    "type": "Polygon",
    "coordinates": [[
      [-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 tolerance = 0.01;

var simplified = turf.simplify(
 feature, tolerance, false);

//=feature

//=simplified
```

**Returns** `Feature.<LineString|Polygon>`, a simplified feature

## Installation

Requires [nodejs](http://nodejs.org/).

```sh
$ npm install turf-simplify
```

## Tests

```sh
$ npm test
```

turf-simplify

Explore Similar Repositories

Was this content helpful?

Recent Feedback

Download README