Part 2: Zero to Hero Environment Setup (Docker, OSM, Golang)
Setting up a local routing engine is notoriously difficult. Most generic tutorials offer a basic Docker command that crashes silently, leaving developers confused. In this guide, we bypass the basic “Hello World” setups. We will build a production-grade local environment integrating OpenStreetMap (OSM) data, a properly tuned Graphhopper (Java) Docker container, and a high-concurrency Golang API Gateway. 1. Downloading and Cropping Map Data Answer-first: Download raw OpenStreetMap data in .osm.pbf format from the Geofabrik server. To save gigabytes of RAM during local development, use osmium extract to crop the massive country-level map down to a single city bounding box. ...