turf-simplify
simplify geographic shapes
turf.simplify(feature, tolerance, highQuality)
Takes a LineString or Polygon and returns a simplified version. Internally uses simplify-js to perform simplification.
Parameters
| parameter | type | description |
|---|---|---|
feature |
Feature.<LineString | Polygon> |
tolerance |
Number | simplification tolerance |
highQuality |
Boolean | whether or not to spend more time to create a higher-quality simplification with a different algorithm |
Example
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
//=simplifiedReturns Feature.<LineString|Polygon>, a simplified feature
Installation
Requires nodejs.
$ npm install turf-simplifyTests
$ npm test
