britmap
Credits & licences
Last updated 14 July 2026
britmap is built on open data and open-source software. This page lists the works it depends on and the licences they are used under, and gives the attributions their licences require.
Map & tile data
The base map is rendered from vector tiles served by OpenFreeMap, using the OpenMapTiles schema (CC BY 4.0). The underlying geographic data is © OpenStreetMap contributors, available under the Open Database Licence (ODbL).
Map data © OpenStreetMap contributors (ODbL).
Terrain & elevation data
The shaded relief and hypsometric colouring are built from Tilezen Terrain Tiles (originally Mapzen), hosted on AWS Open Data. britmap renders that elevation data into its map tiles ahead of time and serves the finished tiles from its own origin, so your browser never contacts AWS while you play — but the terrain you see is still built from these sources, which require the following attributions:
- United States 3DEP (formerly NED) and global GMTED2010 and SRTM terrain data courtesy of the U.S. Geological Survey.
- Europe terrain data produced using Copernicus data and information funded by the European Union — EU-DEM layers.
- United Kingdom terrain data © Environment Agency copyright and/or database right 2015. All rights reserved.
- ArcticDEM terrain data DEM(s) were created from DigitalGlobe, Inc., imagery and funded under National Science Foundation awards 1043681, 1559691 and 1542736.
- Australia terrain data © Commonwealth of Australia (Geoscience Australia) 2017.
- Austria terrain data © offene Daten Österreichs — Digitales Geländemodell (DGM) Österreich.
- Canada terrain data contains information licensed under the Open Government Licence — Canada.
- Global ETOPO1 terrain data U.S. National Oceanic and Atmospheric Administration.
- Mexico terrain data source: INEGI, Continental relief, 2016.
- New Zealand terrain data Copyright 2011 Crown copyright (c) Land Information New Zealand and the New Zealand Government (All rights reserved).
- Norway terrain data © Kartverket.
Software
The interactive map is rendered with MapLibre GL JS, © MapLibre contributors, used under the 3-Clause BSD Licence. It incorporates code from mapbox-gl-js v1.13 and earlier (BSD-3-Clause, © 2020 Mapbox), glfx.js (MIT, © 2011 Evan Wallace) and d3-color (BSD-3-Clause, © 2010–2016 Mike Bostock); the full combined notice covers those in full.
MapLibre GL JS — BSD 3-Clause Licence
Copyright (c) 2023, MapLibre contributors
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name of MapLibre GL JS nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.Typefaces
The lettering — on the map and throughout the interface — uses three typefaces under the SIL Open Font License, Version 1.1. Map labels are set in Fraunces (converted to glyph tiles for the map); the interface pairs Newsreader and Inter.
- Copyright 2018 The Fraunces Project Authors (https://github.com/undercasetype/Fraunces).
- Copyright 2019 The Newsreader Project Authors (https://github.com/productiontype/Newsreader).
- Copyright 2020 The Inter Project Authors (https://github.com/rsms/inter).
SIL Open Font License, Version 1.1
This Font Software is licensed under the SIL Open Font License, Version 1.1. This license is available with a FAQ at: https://openfontlicense.org ----------------------------------------------------------- SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007 ----------------------------------------------------------- PREAMBLE The goals of the Open Font License (OFL) are to stimulate worldwide development of collaborative font projects, to support the font creation efforts of academic and linguistic communities, and to provide a free and open framework in which fonts may be shared and improved in partnership with others. The OFL allows the licensed fonts to be used, studied, modified and redistributed freely as long as they are not sold by themselves. The fonts, including any derivative works, can be bundled, embedded, redistributed and/or sold with any software provided that any reserved names are not used by derivative works. The fonts and derivatives, however, cannot be released under any other type of license. The requirement for fonts to remain under this license does not apply to any document created using the fonts or their derivatives. DEFINITIONS "Font Software" refers to the set of files released by the Copyright Holder(s) under this license and clearly marked as such. This may include source files, build scripts and documentation. "Reserved Font Name" refers to any names specified as such after the copyright statement(s). "Original Version" refers to the collection of Font Software components as distributed by the Copyright Holder(s). "Modified Version" refers to any derivative made by adding to, deleting, or substituting -- in part or in whole -- any of the components of the Original Version, by changing formats or by porting the Font Software to a new environment. "Author" refers to any designer, engineer, programmer, technical writer or other person who contributed to the Font Software. PERMISSION & CONDITIONS Permission is hereby granted, free of charge, to any person obtaining a copy of the Font Software, to use, study, copy, merge, embed, modify, redistribute, and sell modified and unmodified copies of the Font Software, subject to the following conditions: 1) Neither the Font Software nor any of its individual components, in Original or Modified Versions, may be sold by itself. 2) Original or Modified Versions of the Font Software may be bundled, redistributed and/or sold with any software, provided that each copy contains the above copyright notice and this license. These can be included either as stand-alone text files, human-readable headers or in the appropriate machine-readable metadata fields within text or binary files as long as those fields can be easily viewed by the user. 3) No Modified Version of the Font Software may use the Reserved Font Name(s) unless explicit written permission is granted by the corresponding Copyright Holder. This restriction only applies to the primary font name as presented to the users. 4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font Software shall not be used to promote, endorse or advertise any Modified Version, except to acknowledge the contribution(s) of the Copyright Holder(s) and the Author(s) or with their explicit written permission. 5) The Font Software, modified or unmodified, in part or in whole, must be distributed entirely under this license, and must not be distributed under any other license. The requirement for fonts to remain under this license does not apply to any document created using the Font Software. TERMINATION This license becomes null and void if any of the above conditions are not met. DISCLAIMER THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM OTHER DEALINGS IN THE FONT SOFTWARE.
Sounds & artwork
The sound effects and all illustration, iconography and branding in britmap are original works created for the game. They are not drawn from third-party libraries.
Daily stories
Daily stories are drafted with AI assistance from editor-reviewed sources and may contain errors — corrections welcome at hello@britmap.app.