Lightweight Node.js isochrone server. Build isochrones using OSRM, Turf and concaveman.
Francis Galton is the author of the first known isochrone map.
Galton requires Node v8.
npm install -g galton
...or build from source
git clone https://github.com/urbica/galton.git
cd galton
npm installUsage: galton [filename] [options]
where [filename] is path to OSRM data and [options] is any of:
--radius - distance to draw the buffer (default: 6)
--cellSize - the distance across each cell (default: 0.2)
--concavity - concaveman relative measure of concavity (default: 2)
--deintersect - whether or not to deintersect the final isochrones (default: true)
--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)
--sharedMemory - use shared memory (default: false)
--socket - use Unix socket instead of port
--units - either `kilometers` or `miles` (default: kilometers)
--version - returns running version then exitsgalton berlin-latest.osrm
Open examples/index.html?access_token=<token>
cd galton
wget http://download.geofabrik.de/europe/germany/berlin-latest.osm.pbf
./node_modules/osrm/lib/binding/osrm-extract -p ./node_modules/osrm/profiles/car.lua berlin-latest.osm.pbf
./node_modules/osrm/lib/binding/osrm-contract berlin-latest.osrm
npm start berlin-latest.osrmBuild isochrones from point
curl http://localhost:4000 --get --data 'lng=13.38792&lat=52.51704'Build isochrones for 10, 20 and 30 minute intervals
curl http://localhost:4000 --get --data 'lng=13.38792&lat=52.51704&intervals=10&intervals=20&&intervals=30'
See the example, API and test/index.js for more info.
docker run -p 4000:4000 urbica/galton <OSRM>Where OSRM is a path to OSRM graph.
Examples:
This will download geofabrik extract, extract and build OSRM graph using official OSRM Docker image, and run galton on that graph.
wget http://download.geofabrik.de/europe/germany/berlin-latest.osm.pbf
docker run -t -v $(pwd):/data osrm/osrm-backend:v5.18.0 osrm-extract -p /opt/car.lua /data/berlin-latest.osm.pbf
docker run -t -v $(pwd):/data osrm/osrm-backend:v5.18.0 osrm-contract /data/berlin-latest.osrm
docker run -t -i -p 4000:4000 -v $(pwd):/data urbica/galton:v5.18.0 galton /data/berlin-latest.osrmcurl http://localhost:4000 --get --data 'lng=13.38792&lat=52.51704'make test