@turf/envelope
Advanced tools
@turf/envelope is a module from the Turf.js library that allows you to calculate the bounding box (envelope) of a given GeoJSON feature or set of features. This is useful for determining the minimum bounding rectangle that encloses a set of geographical points, lines, or polygons.
Calculate Bounding Box for a Point
This feature allows you to calculate the bounding box for a single point. The code sample creates a point at coordinates [10, 20] and then calculates its bounding box.
const turf = require('@turf/turf');
const point = turf.point([10, 20]);
const envelope = turf.envelope(point);
console.log(envelope);Calculate Bounding Box for a Polygon
This feature allows you to calculate the bounding box for a polygon. The code sample creates a polygon with specified coordinates and then calculates its bounding box.
const turf = require('@turf/turf');
const polygon = turf.polygon([[
[10, 20], [30, 40], [50, 60], [10, 20]
]]);
const envelope = turf.envelope(polygon);
console.log(envelope);Calculate Bounding Box for Multiple Features
This feature allows you to calculate the bounding box for a collection of features. The code sample creates a point and a line, combines them into a feature collection, and then calculates the bounding box for the entire collection.
const turf = require('@turf/turf');
const point = turf.point([10, 20]);
const line = turf.lineString([[30, 40], [50, 60]]);
const featureCollection = turf.featureCollection([point, line]);
const envelope = turf.envelope(featureCollection);
console.log(envelope);The 'bbox' package provides similar functionality to @turf/envelope by calculating the bounding box for GeoJSON features. It is a lightweight alternative but may not offer the extensive set of geospatial operations available in the Turf.js library.
The 'geojson-bbox' package is another alternative that focuses on calculating the bounding box for GeoJSON objects. It is simple to use and can be a good choice if you only need bounding box calculations without the additional features provided by Turf.js.
Takes any number of features and returns a rectangular Polygon that encompasses all vertices.
Parameters
geojson (FeatureCollection | Feature<any>) input featuresExamples
var features = {
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"properties": {
"name": "Location A"
},
"geometry": {
"type": "Point",
"coordinates": [-75.343, 39.984]
}
}, {
"type": "Feature",
"properties": {
"name": "Location B"
},
"geometry": {
"type": "Point",
"coordinates": [-75.833, 39.284]
}
}, {
"type": "Feature",
"properties": {
"name": "Location C"
},
"geometry": {
"type": "Point",
"coordinates": [-75.534, 39.123]
}
}
]
};
var enveloped = turf.envelope(features);
//addToMap
var addToMap = [features, enveloped]
Returns Feature<Polygon> a rectangular Polygon feature that encompasses all vertices
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.
Install this module individually:
$ npm install @turf/envelope
Or install the Turf module that includes it as a function:
$ npm install @turf/turf
4.2.0
@turf/flip@turf/truncate@turf/inside performance increase@turf/circlebearingToAngle method to turf-helpers@turf/buffer points in high latitudes@turf/flip incorrect if z-elevation is presentFAQs
turf envelope module
The npm package @turf/envelope receives a total of 571,318 weekly downloads. As such, @turf/envelope popularity was classified as popular.
We found that @turf/envelope demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 9 open source maintainers collaborating on the project.
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