@turf/polygonize

@turf/polygonize

polygonize

Polygonizes (Multi)LineString(s) into Polygons.

Implementation of GEOSPolygonize function (geos::operation::polygonize::Polygonizer).

Polygonizes a set of lines that represents edges in a planar graph. Edges must be correctly noded, i.e., they must only meet at their endpoints.

The implementation correctly handles:

• Dangles: edges which have one or both ends which are not incident on another edge endpoint.
• Cut Edges (bridges): edges that are connected at both ends but which do not form part of a polygon.

Parameters

• geoJson (FeatureCollection | Geometry | Feature<(LineString | MultiLineString)>) Lines in order to polygonize

• Throws Error if geoJson is invalid.

Returns FeatureCollection<Polygon> Polygons created

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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 @turf/polygonize

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

$ npm install @turf/turf

Changelog

6.3.0

Fix issues importing Turf for react-native, webpack 5, and other bundlers

(PR https://github.com/Turfjs/turf/pull/2004 - Author r0b0t3d) (PR https://github.com/Turfjs/turf/pull/2011 - Author mfedderly)

[@turf/turf][turf] expose @turf/boolean-intersect

(PR https://github.com/Turfjs/turf/pull/2007 - Author rowanwins)