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turf-difference
Advanced tools
Finds the difference between two polygons by clipping the second polygon from the first.
Parameters
poly1
Feature<Polygon> input Polygon feaurepoly2
Feature<Polygon> Polygon feature to difference from poly1
Examples
var poly1 = {
"type": "Feature",
"properties": {
"fill": "#0f0"
},
"geometry": {
"type": "Polygon",
"coordinates": [[
[-46.738586, -23.596711],
[-46.738586, -23.458207],
[-46.560058, -23.458207],
[-46.560058, -23.596711],
[-46.738586, -23.596711]
]]
}
};
var poly2 = {
"type": "Feature",
"properties": {
"fill": "#00f"
},
"geometry": {
"type": "Polygon",
"coordinates": [[
[-46.650009, -23.631314],
[-46.650009, -23.5237],
[-46.509246, -23.5237],
[-46.509246, -23.631314],
[-46.650009, -23.631314]
]]
}
};
var differenced = turf.difference(poly1, poly2);
differenced.properties.fill = '#f00';
var polygons = {
"type": "FeatureCollection",
"features": [poly1, poly2]
};
//=polygons
//=differenced
Returns Feature<Polygon> a Polygon feature showing the area of poly1
excluding the area of poly2
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-difference
Or install the Turf module that includes it as a function:
$ npm install turf
FAQs
[Turf](http://turfjs.org/) difference module
The npm package turf-difference receives a total of 9,374 weekly downloads. As such, turf-difference popularity was classified as popular.
We found that turf-difference demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
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