@spatial/difference

turf difference module

Usage no npm install needed!

<script type="module">
  import spatialDifference from 'https://cdn.skypack.dev/@spatial/difference';
</script>

README

@spatial/difference

difference

Finds the difference between two polygons by clipping the second polygon from the first.

Parameters

Examples

var polygon1 = turf.polygon([[
  [128, -26],
  [141, -26],
  [141, -21],
  [128, -21],
  [128, -26]
]], {
  "fill": "#F00",
  "fill-opacity": 0.1
});
var polygon2 = turf.polygon([[
  [126, -28],
  [140, -28],
  [140, -20],
  [126, -20],
  [126, -28]
]], {
  "fill": "#00F",
  "fill-opacity": 0.1
});

var difference = turf.difference(polygon1, polygon2);

//addToMap
var addToMap = [polygon1, polygon2, difference];

Returns (Feature<(Polygon | MultiPolygon)> | null) a Polygon or MultiPolygon feature showing the area of polygon1 excluding the area of polygon2 (if empty returns null)


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/difference

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

$ npm install @turf/turf