ahmedOpeyemi / node-isochrone

NodeJS isochrone map library

Isochrone

Isochrone maps are commonly used to depict areas of equal travel time. Build isochrones using OSRM, Turf and concaveman.

Installation

npm install -g isochrone

Build graph

wget https://s3.amazonaws.com/metro-extracts.mapzen.com/moscow_russia.osm.pbf
./node_modules/osrm/lib/binding/osrm-extract -p ./node_modules/osrm/profiles/foot.lua moscow_russia.osm.pbf
./node_modules/osrm/lib/binding/osrm-contract moscow_russia.osrm

Usage

const OSRM = require('osrm');
const isochrone = require('isochrone');

const osrm = new OSRM({ algorithm: 'CH', path: './moscow_russia.osrm' });
const startPoint = [37.62, 55.75];

const options = {
  osrm,
  radius: 2,
  cellSize: 0.1,
  intervals: [5, 10, 15]
};

isochrone(startPoint, options)
  .then((geojson) => {
    console.log(JSON.stringify(geojson, null, 2));
  })
  .catch((error) => {
    console.error(error);
  });

See API for more info.