turf-count


turf count module

$3

Takes a FeatureCollection of Point features and a FeatureCollection of Polygon features and calculates the number of points that fall within the set of polygons.

$3

| parameter | type | description |
| ------------ | ----------------- | ------------------------------------------------------------------------------------- |
| polygons | FeatureCollection | a FeatureCollection of Polygon features |
| points | FeatureCollection | a FeatureCollection of Point features |
| countField | String | a field to append to the attributes of the Polygon features representing Point counts |

$3

``js
var polygons = turf.featurecollection([
turf.polygon([[
[-112.072391,46.586591],
[-112.072391,46.61761],
[-112.028102,46.61761],
[-112.028102,46.586591],
[-112.072391,46.586591]
]]),
turf.polygon([[
[-112.023983,46.570426],
[-112.023983,46.615016],
[-111.966133,46.615016],
[-111.966133,46.570426],
[-112.023983,46.570426]
]])
]);
var points = turf.featurecollection([
turf.point([-112.0372, 46.608058], {population: 200}),
turf.point([-112.045955, 46.596264],
{population: 600})
]);

var counted = turf.count(polygons, points, 'pt_count');

var result = turf.featurecollection(
points.features.concat(counted.features));

//=result
`

Installation

Requires nodejs.

`sh
$ npm install turf-count
`

Tests

`sh
$ npm test
``