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 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: 5 10 15 20 25 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 exitsnode index.js moscow_russia.osrm
open examples/index.html?access_token=<token>
Build 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'