Just a collection of scripts that I sometimes use to extract graphs from Open Street Maps.
Install npm modules (once):
npm install
To download JSON file with all roads in the area that matches your search query:
node 0.download-city-roads Bellevue > data/bellevue.json
To convert it to binary format of a graph:
node 1.save-roads-graph.js data/bellevue.json
The graph will be saved in a binary format that is described here: