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simplify

Description

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

Parameters

NameTypeDescription
geojsonGeoJSONobject to be simplified
options?ObjectOptional parameters (default {})
options.tolerance?numbersimplification tolerance (default 1)
options.highQuality?booleanwhether or not to spend more time to create a higher-quality simplification with a different algorithm (default false)
options.mutate?booleanallows GeoJSON input to be mutated (significant performance increase if true) (default false)

Returns

Examples

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);

Installation

$ npm install @turf/simplify

import { simplify } from "@turf/simplify";
const result = simplify(...);
$ npm install @turf/turf

import * as turf from "@turf/turf";
const result = turf.simplify(...);