@turf/mask

mask

Takes any type of polygon and an optional mask and returns a polygon exterior ring with holes.

Parameters

• polygon (FeatureCollection | Feature<(Polygon | MultiPolygon)>) GeoJSON Polygon used as interior rings or holes.
• mask Feature<Polygon>? GeoJSON Polygon used as the exterior ring (if undefined, the world extent is used)

Examples

var polygon = turf.polygon([[[112, -21], [116, -36], [146, -39], [153, -24], [133, -10], [112, -21]]]);
var mask = turf.polygon([[[90, -55], [170, -55], [170, 10], [90, 10], [90, -55]]]);

var masked = turf.mask(polygon, mask);

//addToMap
var addToMap = [masked]

Returns Feature<Polygon> Masked Polygon (exterior ring with holes).

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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 single module individually:

$ npm install @turf/mask

Or install the all-encompassing @turf/turf module that includes all modules as functions:

$ npm install @turf/turf