Lightweight Node.js isochrone server. Build isochrones using OSRM, Turf and concaveman.
Francis Galton is the author of the first known isochrone map.
Galton depends on node version 4.
npm install -g galton
...or build from source
git clone https://github.com/urbica/galton.git
cd galton
npm install
npm run buildUsage: galton [filename] [options]
where [filename] is path to OSRM data and [options] is any of:
--bufferSize - buffer size (default: 6)
--cellWidth - turf-point-grid distance across each cell (default: 0.2)
--concavity - concaveman relative measure of concavity (default: 2)
--intervals - isochrones intervals in minutes (default: 10 20 30)
--lengthThreshold - concaveman length threshold (default: 0)
--pid - save PID to file
--port - port to run on (default: 4000)
--resolution - turf-bezier time in milliseconds between points (default: 10000)
--sharedMemory - use shared memory (default: false)
--sharpness - turf-bezier measure of how curvy the path should be between splines (default: 0.85)
--socket - use Unix socket instead of port
--units - either `kilometers` or `miles` (default: kilometers)
--version - returns running version then exitsgalton moscow_russia.osrm
Open examples/index.html?access_token=<token>
cd galton
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/car.lua moscow_russia.osm.pbf
./node_modules/osrm/lib/binding/osrm-contract moscow_russia.osrm
npm start -- moscow_russia.osrmBuild isochrones from point
curl http://localhost:4000 --get --data 'lng=37.62&lat=55.75'Build isochrones for 10, 20 and 30 minute intervals
curl http://localhost:4000 --get --data 'lng=37.62&lat=55.75&intervals=10&intervals=20&&intervals=30'
Using Galton in your Node.js application
const galton = require('galton');
const config = {
port: 4000,
osrm: 'moscow_russia.osrm'
}
const app = galton.app(config);
app.listen(config.port, () => {
console.log('Listening on %s', config.port);
});See the example, API and test/index.js for more info.
docker run -d -p 4000:4000 urbica/galton <url> <profile>Where url is osm.pbf url and profile is one of the default OSRM profiles (foot is default).
Examples:
This will create docker container with last version of galton using osrm with mapzen extract processed with default car profile
docker run -d -p 4000:4000 urbica/galton "https://s3.amazonaws.com/metro-extracts.mapzen.com/moscow_russia.osm.pbf" carcurl http://localhost:4000 --get --data 'lng=37.62&lat=55.75'You can also set sysctl options for container with --sysctl
docker run \
-d \
-p 4000:4000 \
--sysctl "kernel.shmmax=18446744073709551615"
urbica/galton "https://s3.amazonaws.com/metro-extracts.mapzen.com/moscow_russia.osm.pbf" car