@turf/bbox

What is @turf/bbox?

@turf/bbox is a module from the Turf.js library that calculates the bounding box (bbox) for a given GeoJSON object. A bounding box is an array that defines the minimum and maximum coordinates in the form [minX, minY, maxX, maxY]. This is useful for spatial analysis, mapping, and geographic data processing.

What are @turf/bbox's main functionalities?

Calculate Bounding Box

This feature calculates the bounding box for a single point. The output is an array representing the bounding box.

const turf = require('@turf/turf');
const point = turf.point([102.0, 0.5]);
const bbox = turf.bbox(point);
console.log(bbox); // Output: [102, 0.5, 102, 0.5]

Bounding Box for a Polygon

This feature calculates the bounding box for a polygon. The output is an array representing the bounding box.

const turf = require('@turf/turf');
const polygon = turf.polygon([[
  [100.0, 0.0],
  [101.0, 0.0],
  [101.0, 1.0],
  [100.0, 1.0],
  [100.0, 0.0]
]]);
const bbox = turf.bbox(polygon);
console.log(bbox); // Output: [100, 0, 101, 1]

Bounding Box for a Feature Collection

This feature calculates the bounding box for a feature collection containing multiple points. The output is an array representing the bounding box.

const turf = require('@turf/turf');
const point1 = turf.point([102.0, 0.5]);
const point2 = turf.point([103.0, 1.0]);
const featureCollection = turf.featureCollection([point1, point2]);
const bbox = turf.bbox(featureCollection);
console.log(bbox); // Output: [102, 0.5, 103, 1]

Other packages similar to @turf/bbox

geojson-bbox

The geojson-bbox package provides similar functionality to @turf/bbox by calculating the bounding box for GeoJSON objects. It is a lightweight alternative but does not offer the extensive suite of geospatial tools available in the Turf.js library.

bbox

The bbox package is another alternative that focuses on calculating bounding boxes for various types of GeoJSON objects. It is simpler and more focused compared to @turf/bbox, which is part of a larger geospatial analysis library.

README

turf-bbox

bbox

Takes a set of features, calculates the bbox of all input features, and returns a bounding box.

Parameters

• geojson (Feature | FeatureCollection) input features

Examples

var input = {
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [114.175329, 22.2524]
      }
    }, {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [114.170007, 22.267969]
      }
    }, {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [114.200649, 22.274641]
      }
    }, {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [114.186744, 22.265745]
      }
    }
  ]
};

var bbox = turf.bbox(input);

var bboxPolygon = turf.bboxPolygon(bbox);

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

//=result

Returns Array<number> the bounding box of input given as an array in WSEN order (west, south, east, north)

---

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-bbox

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

$ npm install turf