@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 GeoJSON input featuresExamples
var features = turf.featureCollection([
turf.point([-75.343, 39.984], {"name": "Location A"}),
turf.point([-75.833, 39.284], {"name": "Location B"}),
turf.point([-75.534, 39.123], {"name": "Location C"})
]);
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
6.2.0
After a bit of hiatus, TurfJS is resuming releases.
@turf/boolean-touches][boolean-touches]Determines if two features touch but do not intersect
@turf/boolean-valid][boolean-valid]Checks if the geometry is a valid according to the OGC Simple Feature Specification
@turf/quadrat-analysis][quadrat-analysis]Performs a quadrat analysis on a set of points
@turf/rectangle-grid][rectangle-grid]Creates a grid of rectangles from a bounding box
@turf/voroni][voronoi]Typescript types for the options parameter have been fixed (PR https://github.com/Turfjs/turf/pull/1424 - Author @stevage)
@turf/points-within-polygon][points-within-polygon]Typescript types around the Feature's Properties will now be preserved. (PR https://github.com/Turfjs/turf/pull/1761 - Author @rugheid)
@turf/rewind][rewind]Typescript types for the 'reverse' option are now correct. Previously it was misnamed as 'reversed'. (PR https://github.com/Turfjs/turf/pull/1786 - Author @jonnycornwell)
@turf/difference][difference]No longer publishes an .mjs file.
@turf/meta][meta]No longer publishes an .mjs file.
@turf/tag][tag]Add MultiPolygon support. (PR https://github.com/Turfjs/turf/pull/1996 - Author bryceroney)
@turf/centroid Don't visit first point twice when calculating centroid
(PR https://github.com/Turfjs/turf/pull/1894 - Author @rowanwins)
@turf/transform-translate Better handling of negative distances
(PR https://github.com/Turfjs/turf/pull/1895 - Author @rowanwins)
@turf/union, @turf/difference, @turf/intersect Use polygon-clipping library to fix correctness issues
(PR https://github.com/Turfjs/turf/pull/1916 - Authors @mbullington, @ngottlieb)
@turf/buffer Change default number of steps to 8, and actually support the steps option
(PR https://github.com/Turfjs/turf/pull/1931 - Author stevenchanin)
@turf/buffer Fix projection issues that produce undersized buffers at non-equatorial latitudes
(PR https://github.com/Turfjs/turf/pull/1956 - Author dyakovlev)
@turf/helpers Add runtime checks to point() method, fixing an API break
(PR https://github.com/Turfjs/turf/pull/1964)
@turf/boolean-overlap Better performance for MultiPoint geometries
(PR https://github.com/Turfjs/turf/pull/1910 - Author @mfedderly)
@turf/helpers Add hectares to convertArea
(PR https://github.com/Turfjs/turf/pull/1943 - Author @DanielJDufour)
@turf/great-circle Update Typescript types to support MultiLineString input
(PR https://github.com/Turfjs/turf/pull/1928 - Author kronick)
@turf/square-grid Clarify inputs
(PR https://github.com/Turfjs/turf/pull/1885 - Author @raphael-leger)
@turf/greater-circle Clarify properties option example
(PR https://github.com/Turfjs/turf/pull/1888 - Author @chris-catignani)
@turf/line-to-polygon no longer modifies its input unless the mutate option is true
(PR https://github.com/Turfjs/turf/pull/1879 - Author @MortenBirk)
@turf/unkink-polygon remove Number.prototype.modulo override
(PR https://github.com/Turfjs/turf/pull/1978)
FAQs
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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