# License And Attribution Notes This project combines project-authored code, local normalized data, and links to third-party scholarly resources. There is no blanket license grant over upstream data or third-party assets. ## Project Code And Original Work Imperium Militare is maintained as a non-profit educational and research atlas. The application code, interface layout, data model, import and validation scripts, uncertainty labels, editorial wording, and project-authored summaries are original work for this atlas unless a file explicitly says otherwise. Publishing or viewing the website does not grant a general license to copy the original application code or design as a separate product. If this project is later released under a specific open-source license, that license should be read as applying only to project-authored code and documentation, not to third-party data, images, basemap material, fonts, icons, or source texts. Third-party Creative Commons, open-source, or public-domain materials keep their own terms. Those terms do not transfer ownership of this atlas code to the source providers, and this atlas cannot grant rights over material it does not own. This file is an attribution and license-note summary, not legal advice. ## DARE The Digital Atlas of the Roman Empire is used for place normalization and as the preferred historical geography base. - Link: https://imperium.ahlfeldt.se/ - API documentation: https://imperium.ahlfeldt.se/print.php?doc=info_api - License stated by DARE: CC BY-SA 3.0. Any redistribution or adaptation of DARE-derived data must preserve attribution and comply with share-alike terms. The default live basemap uses the DARE raster tile endpoint currently used by the public atlas: - `https://dh.gu.se/tiles/imperium/{z}/{x}/{y}.png` This endpoint was checked on 2026-04-21 and returned CORS-enabled tiles. If the endpoint changes or access policy changes, switch to the DARE-derived vector map or OpenStreetMap fallback and update this note. The UI also caches DARE legend symbol icons from `https://imperium.ahlfeldt.se/pics/` in `assets/dare-icons/` and transcribes the public DARE legend in `src/dare-legend.js`. Treat those assets as DARE-derived material under the same attribution and share-alike obligations. ## Roman Empire Vector Map The DARE-derived vector basemap style references public resources from: - https://github.com/klokantech/roman-empire - https://klokantech.github.io/roman-empire/ Keep attribution to Johan Ahlfeldt, Ida Storm, Petr Pridal, DARE, and Klokan Technologies when using this layer. ## Pleiades Pleiades IDs are used as crosswalks. - Link: https://pleiades.stoa.org/downloads - Pleiades publishes downloadable data under Creative Commons attribution terms as described on its downloads page. ## RIB Online RIB Online is used through brief summaries and links to source pages. The project does not bundle full inscription editions or long copied text. - Link: https://romaninscriptionsofbritain.org/ Respect RIB Online terms for reuse beyond citation, linking, and short scholarly summaries. ## Livius Livius articles and the Livius chronological legion list are used as linked synthesis sources for the expanded bootstrap legion layer, legion profile metadata, and general auxiliary context in generated unit histories. - Link: https://www.livius.org/articles/legion/ - Chronology link: https://www.livius.org/articles/misc/legion/legion-chronological/ The local data stores short paraphrased summaries and links. It does not reproduce full articles. Treat these records as secondary synthesis until replaced or supplemented by primary corpora. ## Wikipedia Hadrianic Auxiliary Roster The Hadrianic auxiliary roster is used as a public tertiary bootstrap and discovery layer. - Link: https://en.wikipedia.org/wiki/List_of_Roman_auxiliary_regiments - Wikipedia text is licensed under CC BY-SA terms; preserve attribution if redistributing derived material. The local data stores normalized, province-level records with a source link and caution notes. It does not claim to replace Holder, Spaul, or primary evidence. ## Wikipedia Roman Legions Table The public "List of Roman legions" table is used only as a tertiary cross-check for legion symbols, founding dates, founders, and disbandment notes in `data/legion_metadata.json`. - Link: https://en.wikipedia.org/wiki/List_of_Roman_legions - Wikipedia text is licensed under CC BY-SA terms; preserve attribution if redistributing derived material. The local data stores short normalized metadata and caveats, not copied article text. ## Holder / Spaul Bibliographic Sources Holder 2003, Spaul 2000, and Spaul/Cichorius 1994 are documented as the source chain behind the public Hadrianic roster and as priority works for future scholarly verification. - Holder bibliographic record: https://research.manchester.ac.uk/en/publications/auxiliary-deployment-in-the-reign-of-hadrian - BAR Publishing page for *Cohors2*: https://www.barpublishing.com/book/cohors-2/ - FRANTIQ catalogue page for *Ala2*: https://catalogue.frantiq.fr/bib/480839 No copyrighted book text is bundled in this project. ## General Military History Links Generated unit histories include short project-authored summaries and outbound links to general references such as Britannica, World History Encyclopedia, Livius, and Roman-Empire.net. The project does not bundle article text from those sites. ## Praetorian Guard / Castra Praetoria Sources The Praetorian Guard record uses short project-authored summaries and links to: - Platner and Ashby, *A Topographical Dictionary of Ancient Rome*, "Castra Praetoria", via LacusCurtius: https://penelope.uchicago.edu/Thayer/E/Gazetteer/Places/Europe/Italy/Lazio/Roma/Rome/_Texts/PLATOP*/Castra_Praetoria.html - Encyclopaedia Britannica, "Praetorian Guard": https://www.britannica.com/topic/Praetorian-Guard - World History Encyclopedia, "Praetorian Guard": https://www.worldhistory.org/Praetorian_Guard/ - Encyclopaedia Britannica, "Battle of the Milvian Bridge": https://www.britannica.com/topic/Battle-of-the-Milvian-Bridge - Wikidata, "Castra Praetoria (Q1049836)": https://www.wikidata.org/wiki/Q1049836 The local data does not reproduce full article text. World History Encyclopedia material is linked for educational reference; do not copy article text or images from it into downstream projects without checking its current license and non-commercial/share-alike conditions. Wikidata coordinate data is used as a coordinate cross-check for the manual place record. ## Notitia Dignitatum Selected late-antique records use public Latin transcriptions and short summaries. - Wikisource Orientis text: https://la.wikisource.org/wiki/Notitia_dignitatum/Notitia_dignitatum_partibus_orientis_-_XXI_XLV - IntraText Dux Arabiae cross-check: https://www.intratext.com/IXT/LAT0212/_P22.HTM The local data stores unit/station summaries and links, not manuscript images or extended copied text. ## papyri.info / Dura-Europos papyri.info records are used through short summaries and links for the Dura-Europos military papyri. - Link: https://papyri.info/ The local data does not bundle papyrus editions or images. ## OpenStreetMap The fallback basemap uses OpenStreetMap raster tiles. - Link: https://www.openstreetmap.org/copyright - Attribution: Map data (c) OpenStreetMap contributors. ## MapLibre GL JS The frontend loads MapLibre GL JS from a CDN. - Link: https://maplibre.org/ ## Google Fonts / Material Symbols The redesigned interface loads Public Sans, Noto Serif, and Material Symbols Outlined from Google Fonts. - Link: https://fonts.google.com/ ## Wikimedia Commons Aquila Mark The small masthead aquila asset is cached as `assets/aquila-mark.svg` from Wikimedia Commons file "Flag of the Roman Empire with Eagle (3-2).svg". - Author: OttavianoUrsu. - File page: https://commons.wikimedia.org/wiki/File:Flag_of_the_Roman_Empire_with_Eagle_(3-2).svg - License: Creative Commons Attribution-ShareAlike 4.0 International. The browser favicon is cropped from Wikimedia Commons file "Better Imperial Aquila.png"; the downloaded source is cached as `assets/favicon-source.png`, and the resized favicon is `assets/favicon.png`. - Author/uploader: Mattia332. - File page: https://commons.wikimedia.org/wiki/File:Better_Imperial_Aquila.png - Source URL used: https://upload.wikimedia.org/wikipedia/commons/thumb/1/10/Better_Imperial_Aquila.png/250px-Better_Imperial_Aquila.png - License/status: Public Domain Mark 1.0 / public domain notice on Wikimedia Commons. - Local modification: cropped and resized to a 64 x 64 PNG favicon. ## Legion Icon Artwork `assets/insignia/` contains resized local legion icon artwork generated for web display. The large source PNGs that were originally supplied in `assets/legion-icons/` were removed after optimization to keep the project lightweight, and the optimized files now use the shorter `assets/insignia/` path for safer cPanel extraction. The app title-matches these images to normalized legion unit IDs only when the source filename clearly names the same legion. Missing or uncertain matches use `SPQR.png` as a generic fallback. These images are decorative UI artwork and are not treated as independent historical evidence for a legion emblem; use the legion profile symbol notes and cited sources for historical claims. Confirm the upstream source and license metadata for the local icon artwork before redistributing the image files outside this project. ## Project Data The local normalized seed data is curated for this proof of concept, but it includes DARE-derived geometry, linked RIB summaries, public roster-derived auxiliary records, and generated unit-history summaries with outbound links. Treat downstream redistribution as constrained by the most restrictive relevant upstream terms, especially DARE CC BY-SA and any CC BY-SA material used from Wikipedia-derived roster data.