Dissolves a FeatureCollection of polygon features, filtered by an optional property name:value. Note that mulitpolygon features within the collection are not supported

• featureCollection FeatureCollection<Polygon> input feature collection to be dissolved

• options Object Optional parameters (optional, default {})

  • options.propertyName string? features with the same propertyName value will be dissolved.

var features = turf.featureCollection([
  turf.polygon([[[0, 0], [0, 1], [1, 1], [1, 0], [0, 0]]], {combine: 'yes'}),
  turf.polygon([[[0, -1], [0, 0], [1, 0], [1, -1], [0,-1]]], {combine: 'yes'}),
  turf.polygon([[[1,-1],[1, 0], [2, 0], [2, -1], [1, -1]]], {combine: 'no'}),
]);

var dissolved = turf.dissolve(features, {propertyName: 'combine'});

//addToMap
var addToMap = [features, dissolved]

Returns FeatureCollection<Polygon> a FeatureCollection containing the dissolved polygons

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.

Install this single module individually:

$ npm install @turf/dissolve

Or install the all-encompassing @turf/turf module that includes all modules as functions:

$ npm install @turf/turf