Licenses and credits

Updated: October 4, 2026 · Operator: Sand Collective LLC · support@thecorral.app

The Corral is built with and on other people's work. This page credits it on the website. The app has its own page, with each license's full text, under Settings → About → Licenses and credits.

Maps on this website

• Map data © OpenStreetMap contributors, available under the Open Database License.
• Map tiles from OpenFreeMap, using the OpenMapTiles schema.
• MapLibre GL JS 5.24.0, Copyright (c) 2023, MapLibre contributors, under the BSD 3-Clause License. The full text is served beside it.

Maps in the app

• Apple Maps: maps and map pictures in the app come from Apple Maps, with data from Apple's providers (acknowledgements, terms).
• Course thumbnails: the small course maps in Courses in 3D and on the Races page are drawn by The Corral from OpenStreetMap data, © OpenStreetMap contributors, available under the Open Database License. The map data file they're drawn from is itself available under the ODbL.
• Race locations on the app's map: © OpenStreetMap contributors (ODbL).
• Course routes: drawn by The Corral on OpenStreetMap streets (© OpenStreetMap contributors, ODbL) from each organizer's official course map, or taken from the organizer's own course file where their site allows it. Where did this route come from? lists every course and its source.
• Elevation: where a government terrain model covers a course, its profile comes from that model (ground level, with buildings, trees and bridges taken out). Long bridge decks are measured from LiDAR or built from the bridge's published heights. Elsewhere it comes from the Copernicus DEM. The Corral samples and smooths each model's heights along the course to draw its profile; the agencies below made the terrain models, not these profiles, and none of them endorses The Corral.
  • Netherlands: Actueel Hoogtebestand Nederland (AHN), CC0 (ahn.nl).
  • Flanders: Bron: Digitaal Vlaanderen. Digitaal Hoogtemodel Vlaanderen II, DTM 1 m, from LiDAR, reused under the Modellicentie voor gratis hergebruik v1.0; heights sampled and smoothed along the course by The Corral (dataset). This is not an official product of the Flemish Government.
  • North Rhine-Westphalia: Land NRW (2026), Datenlizenz Deutschland – Zero – Version 2.0. Digital terrain model DGM1 (Geobasis NRW), from airborne laser scanning (service).
  • Hamburg: Freie und Hansestadt Hamburg, Landesbetrieb Geoinformation und Vermessung (LGV), Geländemodelle Hamburg – DGM1 2022, dl-de/by-2-0 (Daten geändert) (dataset).
  • Hesse: Hessische Verwaltung für Bodenmanagement und Geoinformation (HVBG), Datenlizenz Deutschland – Zero – Version 2.0 (Daten geändert). Digital terrain model DGM1 and digital surface model DOM1, from airborne laser scanning (dataset).
  • Bavaria: Bayerische Vermessungsverwaltung – www.geodaten.bayern.de. Digital terrain model DGM1, from airborne laser scanning, CC BY 4.0 (Daten geändert: heights sampled and smoothed along the course by The Corral).
  • Lower Saxony: LGLN (2026) Creative Commons Namensnennung – 4.0 International (CC BY 4.0). Digital terrain model DGM1, from airborne laser scanning (Daten geändert: heights sampled and smoothed along the course by The Corral) (dataset).
  • Berlin and Brandenburg: © GeoBasis-DE/LGB, dl-de/by-2-0; © Geoportal Berlin, dl-de/by-2-0 (Daten geändert). Digital terrain model DGM1 (dataset).
  • Wales: Contains Welsh Government LiDAR data, licensed under the Open Government Licence v3.0.
  • Ireland: Contains Irish Public Sector Data (Geological Survey Ireland & the Office of Public Works) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Copyright Government of Ireland (Office of Public Works), OPW LiDAR 2011, digital terrain and surface models 2 m; heights sampled and smoothed along the course by The Corral (dataset).
  • Czech Republic: ČÚZK, 2026. ČÚZK – on-line. ZABAGED® – Výškopis – DMR 5G, digital terrain model from airborne laser scanning, CC BY 4.0, read through ČÚZK's 3D/dmr5g network service; heights sampled and smoothed along the course by The Corral (data terms, service terms, metadata).
  • Poland: Źródło: GUGiK (www.geoportal.gov.pl). Numeryczny Model Terenu (NMT), digital terrain model, free for any use under Polish law (Prawo geodezyjne i kartograficzne, art. 40a); heights sampled and smoothed along the course by The Corral (dataset, terms).
  • Australia: © Commonwealth of Australia (Geoscience Australia) 2015, Digital Elevation Model of Australia derived from LiDAR 5 Metre Grid, CC BY 4.0.
  • New Zealand: Sourced from the LINZ Data Service and licensed by Queenstown-Lakes District Council, for re-use under the Creative Commons Attribution 4.0 International licence (CC BY 4.0). Otago – Queenstown LiDAR 1m DEM (2021); heights sampled and smoothed along the course by The Corral (attribution).
  • Japan: 出典：国土地理院ウェブサイト（https://maps.gsi.go.jp/development/ichiran.html）。地理院タイル（標高タイル（基盤地図情報数値標高モデル）DEM5A）を加工して作成（加工：The Corral）。Geospatial Information Authority of Japan (GSI) elevation tiles, DEM5A from airborne laser survey, used under GSI's content terms (Public Data License 1.0); heights sampled and smoothed along the course by The Corral, not by GSI.
  • Spain: Obra derivada de MDT05 CC-BY 4.0 scne.es (Instituto Geográfico Nacional). Digital terrain model MDT05 from PNOA LiDAR.
  • Italy: Comune di Firenze, DTM LiDAR 2023, CC BY 4.0 (dati modificati). Digital terrain model from the city's LiDAR survey of 27 June 2023 (dataset).
  • England: © Environment Agency copyright and/or database right 2022. All rights reserved. Contains public sector information licensed under the Open Government Licence v3.0. LIDAR Composite Digital Terrain Model (DTM) and Digital Surface Model (DSM), 1 m (dataset).
  • Scotland: Crown copyright Scottish Government and Fugro (2022); Crown copyright Scottish Government and Fugro (2021); Crown copyright Scottish Government and Fugro (2020); Crown copyright Scottish Government, SEPA and Scottish Water (2012). Contains public sector information licensed under the Open Government Licence v3.0. Scottish Public Sector LiDAR, Phases I, IV, V and VI (dataset).
  • France: IGN – RGE ALTI® (updated 1 October 2026), Licence Ouverte / Etalab 2.0. Digital terrain model RGE ALTI® 1 m (dataset).
  • Switzerland: Federal Office of Topography swisstopo. Digital terrain model swissALTI3D (terms of use).
  • United States: U.S. Geological Survey, 3D Elevation Program (3DEP), including its LiDAR point clouds for bridge decks.
  • Canada: Contains information licensed under the Open Government Licence – Canada (Natural Resources Canada elevation data: the High Resolution Digital Elevation Model (HRDEM) Mosaic, CanElevation Series, and CDEM served through USGS 3DEP; dataset).
  • Copernicus DEM: produced using Copernicus WorldDEM-90 © DLR e.V. 2010-2014 and © Airbus Defence and Space GmbH 2014-2018 provided under COPERNICUS by the European Union and ESA; all rights reserved.

Fonts

Barlow and Barlow Condensed (Copyright 2017 The Barlow Project Authors), Sigmar (Copyright 2011 The Sigmar One Project Authors), DM Sans (Copyright 2014 The DM Sans Project Authors) and Fraunces (Copyright 2018 The Fraunces Project Authors), all under the SIL Open Font License 1.1. The website serves its own copies, with each license beside them (Barlow, Barlow Condensed, Sigmar, DM Sans, Fraunces), so no page loads anything from a font service.

Software in the app

• RevenueCat (purchases-ios), Copyright (c) 2024 RevenueCat, Inc., MIT License.
• Ably (ably-cocoa, plugin support, delta codec with xdelta3), Copyright Ably Real-time Ltd; xdelta3 Copyright 2016 Joshua MacDonald. Apache License 2.0.
• msgpack-objective-C, Copyright (C) 2008-2010 FURUHASHI Sadayuki, Apache License 2.0.
• SocketRocket, Copyright (c) 2016-present, Facebook, Inc. (portions 2012 Square Inc.), BSD License.

Races

Race dates, registration windows and start times come from each organizer's own site, linked from every race. Race names, logos and marks belong to their owners. The Corral isn't affiliated with or endorsed by any race.

Something missing?

If you think your work is used here without the credit or permission it needs, write to support@thecorral.app and we'll put it right.