turf line-to-polygon module

Usage no npm install needed!

<script type="module">
  import turfLineToPolygon from 'https://cdn.skypack.dev/@turf/line-to-polygon';




Converts (Multi)LineString(s) to Polygon(s).


  • lines (FeatureCollection | Feature<(LineString | MultiLineString)>) Features to convert
  • options Object Optional parameters (optional, default {})
    • options.properties Object translates GeoJSON properties to Feature (optional, default {})
    • options.autoComplete boolean auto complete linestrings (matches first & last coordinates) (optional, default true)
    • options.orderCoords boolean sorts linestrings to place outer ring at the first position of the coordinates (optional, default true)


var line = turf.lineString([[125, -30], [145, -30], [145, -20], [125, -20], [125, -30]]);

var polygon = turf.lineToPolygon(line);

var addToMap = [polygon];

Returns Feature<(Polygon | MultiPolygon)> converted to 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 module individually:

$ npm install @turf/line-to-polygon

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

$ npm install @turf/turf