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Author message:

Turf packages are now namespaced: please use @turf/union instead

turf-union

3.0.12 • Public • Published

turf-union

union

Takes two polygons and returns a combined polygon. If the input polygons are not contiguous, this function returns a MultiPolygon feature.

Parameters

  • poly1 Feature<Polygon> input polygon
  • poly2 Feature<Polygon> another input polygon

Examples

var poly1 = {
  "type": "Feature",
  "properties": {
    "fill": "#0f0"
  },
  "geometry": {
    "type": "Polygon",
    "coordinates": [[
      [-82.574787, 35.594087],
      [-82.574787, 35.615581],
      [-82.545261, 35.615581],
      [-82.545261, 35.594087],
      [-82.574787, 35.594087]
    ]]
  }
};
var poly2 = {
  "type": "Feature",
  "properties": {
    "fill": "#00f"
  },
  "geometry": {
    "type": "Polygon",
    "coordinates": [[
      [-82.560024, 35.585153],
      [-82.560024, 35.602602],
      [-82.52964, 35.602602],
      [-82.52964, 35.585153],
      [-82.560024, 35.585153]
    ]]
  }
};
var polygons = {
  "type": "FeatureCollection",
  "features": [poly1, poly2]
};
 
var union = turf.union(poly1, poly2);
 
//=polygons
 
//=union

Returns Feature<(Polygon | MultiPolygon)> a combined Polygon or MultiPolygon feature


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-union

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

$ npm install turf

Readme

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Install

npm i turf-union

Weekly Downloads

12,369

Version

3.0.12

License

ISC

Last publish

Collaborators

  • tcql
  • tmcw
  • morganherlocker
  • mourner
  • jvrousseau
  • jseppi
  • cspanring
  • cwmma
  • lyzidiamond