@bmap-turf/simplify
v6.3.2
Published
turf simplify module
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@turf/simplify
simplify
Takes a GeoJSON object and returns a simplified version. Internally uses simplify-js to perform simplification using the Ramer-Douglas-Peucker algorithm.
Parameters
geojson
GeoJSON object to be simplifiedoptions
Object Optional parameters (optional, default{}
)options.tolerance
number simplification tolerance (optional, default1
)options.highQuality
boolean whether or not to spend more time to create a higher-quality simplification with a different algorithm (optional, defaultfalse
)options.mutate
boolean allows GeoJSON input to be mutated (significant performance increase if true) (optional, defaultfalse
)
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);
//addToMap
var addToMap = [geojson, simplified]
Returns GeoJSON a simplified GeoJSON
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.
Installation
Install this module individually:
$ npm install @turf/simplify
Or install the Turf module that includes it as a function:
$ npm install @turf/turf