# @turf/collect

> Merges a specified property from a FeatureCollection of points into a FeatureCollection of polygons.

Latest version **7.4.0** (published 2026-08-03) · MIT license · 0 weekly downloads

## Install

```sh
npm install @turf/collect
pnpm add @turf/collect
yarn add @turf/collect
bun add @turf/collect
```

## Health

**Score 80/100 (A)** — status: active.

Positive: has types; esm support; no vulnerabilities; has provenance; recently updated; high maintenance score; high quality score; popular repo.

Warnings: low downloads.

## Facts

| | |
|---|---|
| Version | 7.4.0 |
| Published | 2026-08-03 |
| First published | 2016-07-06 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | bundled |
| Module format | ESM + CommonJS |
| Dependencies | 6 |
| Unpacked size | 20 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| Provenance | attested (GitHub Actions) |
| GitHub stars | 10491 |
| Author | Turf Authors |
| Maintainers | rowanwins, tmcw, morganherlocker, tcql, mdfedderly, twelch, jamesmilneruk, morgan.herlocker |
| Keywords | aggregate, turf, geojson, points, polygons, stats |

## Links

- npm: https://www.npmjs.com/package/@turf/collect
- Repository: https://github.com/Turfjs/turf
- Issues: https://github.com/Turfjs/turf/issues
- Funding: https://opencollective.com/turf
- npm.io page: https://npm.io/package/@turf/collect

## Dependencies (6)

- [rbush](https://npm.io/package/rbush.md) ^3.0.1
- [tslib](https://npm.io/package/tslib.md) ^2.8.1
- [@turf/bbox](https://npm.io/package/@turf/bbox.md) 7.4.0
- [@turf/helpers](https://npm.io/package/@turf/helpers.md) 7.4.0
- [@types/geojson](https://npm.io/package/@types/geojson.md) ^7946.0.10
- [@turf/boolean-point-in-polygon](https://npm.io/package/@turf/boolean-point-in-polygon.md) 7.4.0

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## Recent versions

- 7.4.0 (latest) — 2026-08-03
- 7.1.0-alpha.70 (prerelease) — 2024-08-09
- 3.5.2-alpha.d2c36ee7 (canary) — 2016-11-04
- 7.3.5 — 2026-04-19
- 7.3.4 — 2026-02-08
- 7.3.3 — 2026-01-28
- 7.3.2 — 2026-01-14
- 7.3.1 — 2025-11-27
- 7.3.0 — 2025-11-17
- 7.2.0 — 2024-12-29
- 7.1.0 — 2024-08-09
- 7.1.0-alpha.7 — 2024-06-25
- 7.0.0 — 2024-06-07
- 7.0.0-alpha.116 — 2024-05-07
- 7.0.0-alpha.115 — 2024-04-23
- … 54 more at https://npm.io/package/@turf/collect/versions

## README

# @turf/collect

<!-- Generated by documentation.js. Update this documentation by updating the source code. -->

## collect

Merges a specified property from a FeatureCollection of points into a
FeatureCollection of polygons. Given an `inProperty` on points and an `outProperty`
for polygons, this finds every point that lies within each polygon, collects the
`inProperty` values from those points, and adds them as an array to `outProperty`
on the polygon.

### Parameters

*   `polygons` **[FeatureCollection][1]<[Polygon][2]>** polygons with values on which to aggregate
*   `points` **[FeatureCollection][1]<[Point][3]>** points to be aggregated
*   `inProperty` **[string][4]** property to be nested from
*   `outProperty` **[string][4]** property to be nested into

### Examples

```javascript
var poly1 = turf.polygon([[[0,0],[10,0],[10,10],[0,10],[0,0]]]);
var poly2 = turf.polygon([[[10,0],[20,10],[20,20],[20,0],[10,0]]]);
var polyFC = turf.featureCollection([poly1, poly2]);
var pt1 = turf.point([5,5], {population: 200});
var pt2 = turf.point([1,3], {population: 600});
var pt3 = turf.point([14,2], {population: 100});
var pt4 = turf.point([13,1], {population: 200});
var pt5 = turf.point([19,7], {population: 300});
var pointFC = turf.featureCollection([pt1, pt2, pt3, pt4, pt5]);
var collected = turf.collect(polyFC, pointFC, 'population', 'values');
var values = collected.features[0].properties.values
//=values => [200, 600]

//addToMap
var addToMap = [pointFC, collected]
```

Returns **[FeatureCollection][1]<[Polygon][2]>** polygons with properties listed based on `outField`

[1]: https://tools.ietf.org/html/rfc7946#section-3.3

[2]: https://tools.ietf.org/html/rfc7946#section-3.1.6

[3]: https://tools.ietf.org/html/rfc7946#section-3.1.2

[4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String

<!-- This file is automatically generated. Please don't edit it directly. If you find an error, edit the source file of the module in question (likely index.js or index.ts), and re-run "yarn docs" from the root of the turf project. -->

---

This module is part of the [Turfjs project](https://turfjs.org/), an open source module collection dedicated to geographic algorithms. It is maintained in the [Turfjs/turf](https://github.com/Turfjs/turf) repository, where you can create PRs and issues.

### Installation

Install this single module individually:

```sh
$ npm install @turf/collect
```

Or install the all-encompassing @turf/turf module that includes all modules as functions:

```sh
$ npm install @turf/turf
```

---
_Source: https://npm.io/package/@turf/collect · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._