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turf-inside
Advanced tools
Readme
Takes a Point and a Polygon or MultiPolygon and determines if the point resides inside the polygon. The polygon can be convex or concave. The function accounts for holes.
Parameters
point
Feature<Point> input pointpolygon
Feature<(Polygon | MultiPolygon)> input polygon or multipolygonExamples
var pt1 = {
"type": "Feature",
"properties": {
"marker-color": "#f00"
},
"geometry": {
"type": "Point",
"coordinates": [-111.467285, 40.75766]
}
};
var pt2 = {
"type": "Feature",
"properties": {
"marker-color": "#0f0"
},
"geometry": {
"type": "Point",
"coordinates": [-111.873779, 40.647303]
}
};
var poly = {
"type": "Feature",
"properties": {},
"geometry": {
"type": "Polygon",
"coordinates": [[
[-112.074279, 40.52215],
[-112.074279, 40.853293],
[-111.610107, 40.853293],
[-111.610107, 40.52215],
[-112.074279, 40.52215]
]]
}
};
var features = {
"type": "FeatureCollection",
"features": [pt1, pt2, poly]
};
//=features
var isInside1 = turf.inside(pt1, poly);
//=isInside1
var isInside2 = turf.inside(pt2, poly);
//=isInside2
Returns Boolean true
if the Point is inside the Polygon; false
if the Point is not inside the Polygon
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-inside
Or install the Turf module that includes it as a function:
$ npm install turf
FAQs
turf inside module
We found that turf-inside demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 9 open source maintainers collaborating on the project.
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