Imperium Militare
Non-profit Educational Project

Attributions

Imperium Militare is a non-profit educational and research atlas for studying Roman military dispositions. It is built to make cited historical evidence easier to inspect, compare, and question; it is not a commercial product, an official edition of any source, or a substitute for the underlying corpora and scholarship.

This page separates project-authored code and curation from third-party datasets, map layers, fonts, icons, and reference sources. Credit is owed to every source named here; ownership and license terms remain with their original creators.

Project Purpose And Status

  • Educational useThis site is maintained as a non-profit learning, research, and visualization project for historians, students, and serious enthusiasts.
  • No endorsement impliedUse of DARE, Pleiades, RIB Online, Wikimedia, Wikipedia, MapLibre, Google Fonts, OpenStreetMap, or any other source does not imply sponsorship, review, or endorsement by those projects or their authors.
  • Historical cautionThe atlas is a work in progress. Low-confidence markers, estimated placements, and synthesis records are clearly labeled and should be checked against primary evidence before scholarly reuse.

Important Source Warning

Some public roster sources prove only that a unit is attested in a province or command at a broad date. The app may show low-confidence estimated markers for usability, but those markers do not turn provincial evidence into exact fort evidence.

Review Methodology, SOURCES.md, and LICENSE_NOTES.md before reusing the data. This attribution notice is an editorial good-faith summary, not legal advice.

Project-authored Work

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 this 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 will apply 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.

Reuse And License Boundaries

  • Own code and documentationThe original app code, schema documentation, interface composition, and editorial curation remain project-authored material unless a separate license file grants broader permission.
  • Third-party materialDARE-derived geography, DARE legend icons, Wikimedia assets, Wikipedia-derived text or roster data, Pleiades IDs, OpenStreetMap data, fonts, libraries, and linked source pages remain governed by their own licenses and terms.
  • Share-alike and non-commercial cautionSome upstream materials carry CC BY-SA, CC BY-NC, or CC BY-NC-SA terms. Reusers must preserve attribution, respect share-alike requirements, and avoid assuming this project can relicense those materials for commercial use.
  • Practical ruleBefore republishing the site, keep SOURCES.md, LICENSE_NOTES.md, this attribution page, and visible in-app attribution together.

Base Geography And Mapping

  • Digital Atlas of the Roman Empire (DARE)Ancient place IDs, place normalization, selected place geometry, live raster basemap, DARE-derived vector basemap context, basemap legend text, and cached legend icons. DARE states CC BY-SA 3.0. imperium.ahlfeldt.se
  • DARE API documentationUsed to document public GeoJSON/place lookup options and integration limits. API notes
  • DARE legend and symbol iconsUsed for the complete in-app basemap legend. Icons are cached from DARE's public /pics/ assets and treated as DARE-derived material. legend page
  • Roman Empire Vector Map / Klokan TechnologiesOptional DARE-derived vector basemap resources. Preserve attribution to Johan Ahlfeldt, Ida Storm, Petr Pridal, DARE, and Klokan Technologies. project
  • PleiadesCrosswalk identifiers and ancient-place normalization where useful. downloads and terms
  • OpenStreetMap contributorsFallback basemap and map-data attribution when the OSM layer is selected. copyright and attribution
  • MapLibre GL JSInteractive web mapping library loaded from CDN. maplibre.org
  • Google Fonts and Material SymbolsInterface typography and navigation icons: Public Sans, Noto Serif, and Material Symbols Outlined. fonts.google.com
  • Wikimedia Commons aquila markThe small masthead eagle flag is derived from Flag of the Roman Empire with Eagle (3-2).svg by OttavianoUrsu, licensed CC BY-SA 4.0, cached locally as assets/aquila-mark.svg. file page
  • Wikimedia Commons favicon aquilaThe browser favicon is cropped from Better Imperial Aquila.png by Mattia332, marked public domain on Wikimedia Commons. The source preview is cached locally as assets/favicon-source.png, with the 64 x 64 derivative at assets/favicon.png. file page

DARE Basemap Layer Sources

The DARE legend credits several map-layer data sources. This atlas preserves those notices in the in-app legend and repeats them here for visibility.

  • Ancient World Mapping Center (AWMC), CC BY-NC 3.0, for Barrington Atlas Roman roads and ancient coastline.
  • The Secret History of the Roman Roads of Britain, CC BY-NC-SA, for Roman roads in Britain.
  • ROMAQ, The Atlas Project of Roman Aqueducts, for aqueduct data.
  • SRTM 90m Digital Elevation Database v4.1, CGIAR-CSI, for elevation.
  • Corine Land Cover 2000 seamless vector data, version 16, European Environment Agency, for modern land-cover categories.

Military Evidence And Synthesis

  • Roman Inscriptions of Britain Online for linked British inscriptions, site pages, and military diploma references.
  • Livius legion articles and chronological legion list for synthesis records, movement phases, and legion profile metadata.
  • Platner and Ashby, A Topographical Dictionary of Ancient Rome, via LacusCurtius, for the Castra Praetoria exact-site record.
  • papyri.info and Dura-Europos military papyri context for exact-site seed records.
  • Notitia Dignitatum public Latin transcriptions via Wikisource and IntraText for selected late-antique command layers.
  • Public "List of Roman legions" and "List of Roman auxiliary regiments" pages as tertiary audit/bootstrap layers, not final proof.
  • Holder, Spaul, and Cichorius bibliographic records as priority source chains for future auxiliary verification. No copyrighted book text is bundled.

General Historical Context

Short unit-history notes may use linked public reference pages for broad context about army organization, equipment, and events. These sources do not create exact map placements by themselves.

  • Britannica, especially general legion and event/place articles used as public context links.
  • World History Encyclopedia for broad Roman military organization and legionary equipment context.
  • Livius auxiliary and legion pages for concise synthesis and further bibliography.
  • Roman-Empire.net for general auxilia background and interpretive orientation.
  • Wikidata/Commons coordinates where a specific non-DARE place must be manually cross-checked, such as Castra Praetoria.
  • Wikipedia articles such as "Roman legion" and "Imperial Roman army" as tertiary orientation only, with CC BY-SA obligations where text is adapted.