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alurail • Platform & Legal Ecosystem

Open Source Licenses & Attributions

Acknowledgements, Attribution Notices, and License Documentation for Open-Source Software and Public Geospatial Data

OpenStreetMap • OpenRailwayMap • PostGIS • Leaflet.js
Effective Date: January 1, 2025 (Community & ODbL Attribution)

Open Source Philosophy & Community Gratitude

Built on Open Geographic Standards and Collaborative Technology

alurail stands on the shoulders of the global open-source community, open geospatial data initiatives, and collaborative software projects. Without the tireless dedication of thousands of open-source software developers and cartography mappers worldwide, creating an interactive, real-time railway simulation platform of this magnitude would not be possible.

We extend our profound gratitude and provide formal licensing attributions for all core technologies powering our platform:

Core Geospatial & Mapping Attributions

Map Data Providers and Spatial Processing Engines
OpenStreetMap (OSM)
Attribution: © OpenStreetMap contributors.
License: Open Database License (ODbL 1.0).
Provides the foundational global geographic vector data, coastlines, administrative boundaries, and road networks.
OpenRailwayMap
Attribution: © OpenRailwayMap & OpenStreetMap contributors.
License: Creative Commons Attribution-ShareAlike 2.0 (CC-BY-SA 2.0).
Provides detailed global railway infrastructure, track switches, sidings, signals, and station yard layouts.
PostgreSQL & PostGIS
Licenses: PostgreSQL License • GNU General Public License v2+ (GPL-2.0+).
Serves as the high-performance geospatial spatial database executing spatial topology queries, bounding-box spatial indexes, and distance calculations.
Leaflet.js
Author: Volodymyr Agafonkin & contributors.
License: 2-Clause BSD License.
Powers the responsive interactive map canvas, custom vector rendering pipelines, smooth zoom animations, and canvas-based train markers.

Frontend Libraries & Design Frameworks

Open Source UI Components and Typography
Component / Asset Creator / Maintainer License Type Role in Platform
Phosphor Icons Phosphor Icons Community MIT License Provides UI iconography across navigation rails, buttons, and HUD badges.
Font Awesome Free Fonticons, Inc. SIL OFL 1.1 / MIT / CC BY 4.0 Supplies iconography for control panels and marker legends.
Sulphur Point Font Dale Sattler SIL Open Font License 1.1 Official brand typography for alurail.
Plus Jakarta Sans Font Gumpita Rahayu & Tokotype SIL Open Font License 1.1 Primary body typography and layout prose font.
Outfit Font Rodrigo Fuenzalida SIL Open Font License 1.1 Modern geometric display font for metric counters and headers.
jQuery Core OpenJS Foundation MIT License DOM interaction, event delegation, and asynchronous data polling.

Mathematical Models & Algorithms

Computational Foundations Implemented Across the Engine
  • Dijkstra & A* Graph Search: Optimal pathfinding along directed spatial railway topologies.
  • Chaikin's Corner-Cutting Algorithm: Vector rail curvature smoothing for aesthetic track polyline visualization.
  • Hidden Markov Model (HMM) Viterbi Algorithm: Real-time spatial map-matching validating crowdsourced GPS pings to track centerlines.
  • Train Kinematics Acceleration Equations: Continuous calculation of speed profiles across gradient slopes and civil speed limit zones.

System Architecture & Engineering Whitepaper

Comprehensive Developer Guide on Map Geometry, Spatial Kinematics, & Pipelines

Looking for an in-depth technical explanation of how our railway map topology, dead reckoning kinematics, through-train corridor stitching, and static cache layers are designed and compiled?

Read Architecture Guide (/git) →

Have Questions or Want to Collaborate?

Reach out to our team for questions, data licensing inquiries, or partnerships

Have questions regarding our open data utilization, licensing attribution, or wish to explore collaborative railway telemetry research? Contact us directly via WhatsApp, email, or our official contact form.