JarCastingturf-tag
turf tag module
turf.tag(points, polygons, polyId, containingPolyId)
Takes a set of Point|points and a set of Polygon|polygons and performs a spatial join.
Parameters
| parameter | type | description |
|---|---|---|
points |
FeatureCollection.<Point> | input points |
polygons |
FeatureCollection.<Polygon> | input polygons |
polyId |
String | property in polygons to add to joined Point features |
containingPolyId |
String | property in points in which to store joined property from `polygons |
Example
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
Installation
Requires nodejs.
$ npm install turf-tag
Tests
$ npm test
