turf-nearest

turf nearest module

turf.nearest(point, against)

Takes a reference Point|point and a set of points and returns the point from the set closest to the reference.

Parameters

parameter	type	description
point	Feature.<Point>	the reference point
against	FeatureCollection.<Point>	input point set

Example

var point = {
  "type": "Feature",
  "properties": {
    "marker-color": "#0f0"
  },
  "geometry": {
    "type": "Point",
    "coordinates": [28.965797, 41.010086]
  }
};
var against = {
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [28.973865, 41.011122]
      }
    }, {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [28.948459, 41.024204]
      }
    }, {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [28.938674, 41.013324]
      }
    }
  ]
};

var nearest = turf.nearest(point, against);
nearest.properties['marker-color'] = '#f00';

var resultFeatures = against.features.concat(point);
var result = {
  "type": "FeatureCollection",
  "features": resultFeatures
};

//=result

Returns Feature.<Point>, the closest point in the set to the reference point

Installation

Requires nodejs.

$ npm install turf-nearest

Tests

$ npm test