Goblin

A transit network editor for designing and visualizing metro/rail systems. Draw stations and lines on a real map, then generate a clean schematic diagram.

Features

• Map-based editing — place stations on a real OpenStreetMap base layer
• Line management — create lines with custom names and colors, draw edges per line
• Schematic generation — automatically generates an octilinear schematic diagram from the geographic layout using simulated annealing

Tech Stack

• Frontend — React, TypeScript, Leaflet
• Backend — Rust

Getting Started

Prerequisites

• Node.js (v18+)
• Rust (stable)

Run

Terminal 1 — backend:

cd core
cargo run -p api

Terminal 2 — frontend:

cd frontend
npm install
npm run dev

Then open http://localhost:5173.

Usage

1. Add stations — select the Add Station tool and click on the map
2. Create a line — click + New Line in the sidebar, give it a name and color
3. Draw edges — click Draw on a line, then click pairs of stations on the map to connect them. Edges are automatically assigned to that line. Multiple lines can share the same edge.
4. Generate schematic — click Generate Schematic to produce an octilinear diagram on the right panel
5. Export — use the export buttons to save your network as JSON or the diagram as SVG