@spatial/polygonize

polygonize

Polygonizes [(Multi)LineString(s)][1] into [Polygons][2].

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.

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- geoJson ([FeatureCollection][3] \| [Geometry][4] \| [Feature][5]<([LineString][6] \| [MultiLineString][7])>) Lines in order to polygonize

- Throws [Error][8] if geoJson is invalid.

Returns [FeatureCollection][3]<[Polygon][9]> Polygons created

[1]: https://tools.ietf.org/html/rfc7946#section-3.1.4

[2]: https://tools.ietf.org/html/rfc7946#section-3.1.6

[3]: https://tools.ietf.org/html/rfc7946#section-3.3

[4]: https://tools.ietf.org/html/rfc7946#section-3.1

[5]: https://tools.ietf.org/html/rfc7946#section-3.2

[6]: https://tools.ietf.org/html/rfc7946#section-3.1.4

[7]: https://tools.ietf.org/html/rfc7946#section-3.1.5

[8]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error

[9]: https://tools.ietf.org/html/rfc7946#section-3.1.6

---

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.

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Install this module individually:

``sh
$ npm install @spatial/polygonize
`

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

`sh
$ npm install @turf/turf
``