Package Exports

@turf/union

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@turf/union) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

@turf/union

union

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

Parameters

A ...Feature<Polygon> polygon to combine

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/turf