@spatial/dissolve

dissolve

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

Parameters

• featureCollection FeatureCollection<Polygon> input feature collection to be dissolved
• options Object Optional parameters (optional, default {})
  • options.propertyName string? features with equals 'propertyName' in properties will be merged

Examples

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

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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 @spatial/dissolve

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

$ npm install @turf/turf