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turf-tag

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turf-tag

turf tag module

  • 3.0.12
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turf-tag

tag

Takes a set of points and a set of polygons and performs a spatial join.

Parameters

  • points FeatureCollection<Point> input points
  • polygons FeatureCollection<Polygon> input polygons
  • field string property in polygons to add to joined Point features
  • outField string property in points in which to store joined property from `polygons

Examples

var bbox = [0, 0, 10, 10];
// create a triangular grid of polygons
var triangleGrid = turf.triangleGrid(bbox, 50, 'miles');
triangleGrid.features.forEach(function(f) {
  f.properties.fill = '#' +
    (~~(Math.random() * 16)).toString(16) +
    (~~(Math.random() * 16)).toString(16) +
    (~~(Math.random() * 16)).toString(16);
  f.properties.stroke = 0;
  f.properties['fill-opacity'] = 1;
});
var randomPoints = turf.random('point', 30, {
  bbox: bbox
});
var both = turf.featurecollection(
  triangleGrid.features.concat(randomPoints.features));

//=both

var tagged = turf.tag(randomPoints, triangleGrid,
                      'fill', 'marker-color');

//=tagged

Returns FeatureCollection<Point> points with containingPolyId property containing values from polyId


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 turf-tag

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

$ npm install turf

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Package last updated on 05 Jul 2016

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