JSPM

dobbyscan

A very fast density based clustering JavaScript library for geographic points. Implements a variation of DBSCAN with great circle distance metric.

Example

const clusters = dobbyscan(points, radius, p => p.lon, p => p.lat);

API

dobbyscan(points, radius[, getLng, getLat])

Returns an array of clusters, where each cluster is an array of points (from the input array).

• points: an array of input points of an arbitrary format.
• radius: density clustering radius in kilometers.
• getLng: (optional) a function that returns longitude given an input point, (p) => p[0] by default.
• getLat: (optional) a function that returns latitude given an input point, (p) => p[1] by default.

Performance

This library is incredibly fast — run bench.js to see it cluster 135k points in one second.

Install

npm install dobbyscan