@turf/center-mean

What is @turf/center-mean?

@turf/center-mean is a module from the Turf.js library that calculates the mean center of a set of geographical points. This is useful for finding the average location of a group of points, which can be applied in various geospatial analyses.

What are @turf/center-mean's main functionalities?

Calculate Mean Center

This feature calculates the mean center of a set of points. The code sample creates a collection of points and then calculates their mean center using the `turf.centerMean` function.

const turf = require('@turf/turf');

const points = turf.featureCollection([
  turf.point([0, 0]),
  turf.point([10, 10]),
  turf.point([20, 20])
]);

const meanCenter = turf.centerMean(points);
console.log(meanCenter);

Other packages similar to @turf/center-mean

@turf/center

@turf/center calculates the centroid (geometric center) of a set of geographical points. While @turf/center-mean calculates the mean center, which is the average of the coordinates, @turf/center calculates the centroid, which is the center of mass of the shape formed by the points.

geolib

geolib is a library for geospatial calculations. It provides functions to calculate the center of a set of points, distance between points, and more. Compared to @turf/center-mean, geolib offers a broader range of geospatial functions but may not be as specialized in calculating mean centers.

leaflet

Leaflet is a popular library for interactive maps. It provides various utilities for geospatial data, including functions to calculate the center of a set of points. While Leaflet is primarily focused on map rendering and interaction, it also includes some geospatial analysis features similar to @turf/center-mean.

README

@turf/center-mean

centerMean

Takes a Feature or FeatureCollection and returns the mean center. Can be weighted.

Parameters

• geojson GeoJSON GeoJSON to be centered
• options Object Optional parameters (optional, default {})
  • options.properties Object an Object that is used as the Feature's properties (optional, default {})
  • options.weight number? the property name used to weight the center

Examples

var features = turf.featureCollection([
  turf.point([-97.522259, 35.4691], {weight: 10}),
  turf.point([-97.502754, 35.463455], {weight: 3}),
  turf.point([-97.508269, 35.463245], {weight: 5})
]);

var options = {weight: "weight"}
var mean = turf.centerMean(features, options);

//addToMap
var addToMap = [features, mean]
mean.properties['marker-size'] = 'large';
mean.properties['marker-color'] = '#000';

Returns Feature<Point> a Point feature at the mean center point of all input features

---

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/center-mean

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

$ npm install @turf/turf

Changelog

5.0.0 🎉

⭐️ Major Updates

• TurfJS now supports ES Modules (Related PR's)
• Optional parameters are now defined as an Object.

🚀 New Modules

[@turf/voronoi][voronoi]

Takes a FeatureCollection of points, and a bounding box, and returns a FeatureCollection of Voronoi polygons. (PR https://github.com/Turfjs/turf/pull/1043 - Author @stevage)

[@turf/shortest-path][shortest-path]

Returns the shortest path from start to end without colliding with any feature in obstacles (PR https://github.com/Turfjs/turf/pull/956 - Author @stebogit)

[@turf/boolean-parallel][boolean-parallel]

Boolean-Parallel returns True if each segment of line1 is parallel to the correspondent segment of line2 (PR https://github.com/Turfjs/turf/pull/941 - Author @stebogit)

[@turf/nearest-point-on-line][nearest-point-on-line]

Takes a {@link Point} and a {@link LineString} and calculates the closest Point on the (Multi)LineString. (PR https://github.com/Turfjs/turf/pull/939 - Author @stebogit)

🏅 New Features/Enhancements

• Updates [@turf/unkink-polygon][unkink-polygon] testing & added flattenEach instead of using flatten. (PR https://github.com/Turfjs/turf/pull/889)

• Add multi-geomtry support to @turf/line-split (PR https://github.com/Turfjs/turf/pull/1078)

• Improve @turf/meta lineEach method to provide properties, id and bbox (PR https://github.com/Turfjs/turf/pull/1010)

🐛 Bug Fixes

• Fixes @turf/helpers earth radius variable (PR https://github.com/Turfjs/turf/pull/1012)

• Fixes @turf/polygon-tangents bug (PR https://github.com/Turfjs/turf/pull/1058)

• Fixes @turf/line-chunk bug when the number of segments is integer (PR https://github.com/Turfjs/turf/pull/1046)

• Fixes segmentEach and segmentReduce methods in @turf/meta to ensure something is returned (PR https://github.com/Turfjs/turf/pull/968)

⚠️ Breaking Change

• Optional parameters are now defined as an Object:

Before

var from = [-75.343, 39.984];
var to = [-75.534, 39.123];
var units = 'miles';
var distance = turf.distance(from, to, units);

After

var from = [-75.343, 39.984];
var to = [-75.534, 39.123];
var options = {units: 'miles'};
var distance = turf.distance(from, to, options);

• Reworked @turf/random PR https://github.com/Turfjs/turf/issues/994
• Deprecate @turf/idw Issue https://github.com/Turfjs/turf/issues/887
• Reworked Grid modules @turf/point-grid/hex/square/triangle PR https://github.com/Turfjs/turf/pull/1029
• Renamed Modules/Methods
  • [x] @turf/inside => @turf/boolean-point-in-polygon https://github.com/Turfjs/turf/issues/860#issuecomment-317216235
  • [x] @turf/within => @turf/points-within-polygon https://github.com/Turfjs/turf/issues/860#issuecomment-317216235
  • [x] @turf/bezier => @turf/bezier-spline Issue https://github.com/Turfjs/turf/issues/661
  • [x] @turf/nearest => @turf/nearest-point https://github.com/Turfjs/turf/pull/858#issuecomment-317197295
  • [x] @turf/point-on-line => @turf/nearest-point-on-line https://github.com/Turfjs/turf/pull/858#issuecomment-317197295
  • [x] @turf/lineDistance => @turf/length https://github.com/Turfjs/turf/issues/860#issuecomment-317229869
  • [x] @turf/helpers
    • [x] radians2degrees => radiansToDegrees
    • [x] degrees2radians => degreesToRadians
    • [x] distanceToDegrees => lengthToDegrees
    • [x] distanceToRadians => lengthToRadians
    • [x] radiansToDistance => radiansToLength
    • [x] bearingToAngle => bearingToAzimuth
    • [x] convertDistance => convertLength