# Selected-highlight images

Nineteen contextual images, sourced from individual Wikimedia Commons file pages on 6 November 2026. Each image keeps its own licence; neither the map's data licences nor the website's code notices replace these image terms. Exact source filenames, creator credits, file-page URLs, licence URLs, download URLs, dimensions, changes and local SHA-256 hashes are in [`../data/photos.json`](../data/photos.json). The pinned API evidence is [`../data/commons-images.json`](../data/commons-images.json), with editorial choices in [`../data/image-selection.json`](../data/image-selection.json).

| Highlight / local file | Creator | Licence / status | What is depicted |
| --- | --- | --- | --- |
| Oseberg · Q832395.jpg | Petter Ulleland | CC BY-SA 4.0 | Original ship displayed in Oslo, 2016 |
| Gokstad · Q640851.jpg | Karamell | CC BY-SA 2.5 | Original ship in museum display |
| Tune · Q778065.jpg | China Crisis | CC BY-SA 2.5 | Original surviving timbers in museum display |
| Ladby · Q1799877.jpg | Malene Thyssen | CC BY-SA 3.0 | Burial remains preserved in situ |
| Skuldelev · Q831457.jpg | Colin | CC BY-SA 4.0 | Skuldelev 1, one of the five vessels, in Roskilde |
| Hedeby 1 · Q18412197.jpg | Xocolatl | Public domain | Longship reconstruction model at Hedeby, not the original hull |
| Kyrenia · Q2234980.jpg | Mgiganteus1 (English Wikipedia) | CC BY-SA 3.0 | Surviving original hull in its museum |
| Antikythera · Q2616711.jpg | Unknown photographer | Public domain | Recovery expedition on Mykali, winter 1900–1901 |
| Mahdia · Q3589083.jpg | Pascal Radigue | CC BY 3.0 | Ship reconstruction model in the Bardo Museum |
| Madrague de Giens · Q6728460.jpg | dronepicr | CC BY 2.0 | Reconstruction model in Mainz |
| Mazarrón · Q2884899.jpg | Nanosanchez | Public domain | Reconstruction of Mazarrón II at ARQUA, Cartagena |
| Bajo de la Campana · Q65006224.jpg | Jamie Heath | CC BY 2.0 | Recovered inscribed ivory tusks, not a ship hull |
| Uluburun · Q573852.jpg | Martin Bahmann | CC BY-SA 3.0 | Wooden reconstruction model |
| Nemi ships · Q1190639.jpg | Unknown photographer; published in Bilderwoche | Public domain | Historical photograph of a recovered hull, 1929 |
| Vasa · Q219821.jpg | JavierKohen | CC BY-SA 3.0 | Preserved original hull in museum display |
| Mary Rose · Q544894.jpg | Mary Rose Trust | CC BY-SA 3.0 | Surviving hull during conservation |
| Kronan · Q1789811.jpg | Jacob Hägg | Public domain | Later artistic depiction, not a wreck photograph |
| Gribshunden · Q20819337.jpg | Ishkabibble | CC BY-SA 4.0 | Survey-derived photogrammetric wreck plan |
| Bremen cog · Q907712.jpg | Olga Ernst | CC BY-SA 4.0 | Original preserved hull, not a sailing replica |

Public-domain links in the UI identify status using the Public Domain Mark; that mark is not itself a copyright licence. Creative Commons image adaptations remain subject to each image's BY or BY-SA version. Attribution, source link, licence link and the changes “resized · sepia display” appear next to the selected image. Full source/terms remain available from the linked file page.

## Licence and subject review

The licence fields were checked on the **individual files**, not inferred from Wikimedia's general footer or from their presence on Wikipedia. Ladby's older file lacks a machine-readable Artist field: its raw `MaleneThyssenCredit` template explicitly identifies Malene Thyssen and offers CC BY-SA 3.0 / 2.5; the chosen 3.0 grant is also reported by imageinfo. That explicit creator credit is retained.

The English Wikipedia lead photo **Nemi Ship Hull 1930.jpg was not copied**: its English file page reports PD-Italy with unconfirmed US copyright status and prior Commons deletion. Instead, the Commons file **Nemi-Schiff.jpg**, also shown on the Nemi article, reports public-domain status for a photograph published in *Bilderwoche* in 1929. This is why the UI says 1929 rather than 1930.

The original Wikidata P18 suggestion for Madrague de Giens was an unrelated Ulysses mosaic: rejected in favour of a specifically identified reconstruction model. The initial Mahdia cargo-column image was replaced at the user's request with an explicitly identified reconstruction of the ship (`Bardo Mahdia navire.JPG`). Museum, artefact and reconstruction captions are explicit; no image is presented as an underwater photograph of the selected wreck unless it actually is one. All nineteen prepared images were visually reviewed in contact sheets before inclusion. The proposed Gribshunden lead image showed a cast figurehead, not a complete ship: a licensed photogrammetric wreck-plan image was selected instead. Kronan is explicitly an artistic reconstruction, not a contemporary photograph; Bremen's image shows the original museum hull rather than a sailing replica.

## Preparation and UI

```sh
uv run --with pillow scripts/prepare-vintage-images.py
uv run --with shapely scripts/prepare-vintage-wrecks.py
```

The first script reads pinned selection/API metadata, verifies the accepted licence labels, downloads only from public Wikimedia image hosts (two at a time), caches temporary inputs outside the repository, applies EXIF orientation, fits within **960 × 640** without cropping, converts to RGB and saves JPEG at quality 82 with EXIF removed. Total local JPEG size is approximately **2.06 MB** for all nineteen; original-resolution downloads are not committed. The second script refreshes the atlas data/provenance hashes, including the image metadata.

The local JPEGs retain their unfiltered colours. The browser applies **CSS `filter: sepia(1)`**; a “view unfiltered” link opens the resized, original-colour local copy. Sepia is a disclosed visual treatment—not a claim that the modern museum photographs are old. `object-fit: contain` preserves each image's composition, including portrait photographs.

Only the selected highlight's image is requested; the browser does not download all nineteen at startup. The photo panel appears in the separate selected-record inspector beside the register on desktop. Background and optional later records clear/hide it rather than retaining an unrelated picture. Rapid selection changes update image, caption and credit together. Metadata or image failures leave the map usable and show an explicit image-unavailable message with source links where available.

AI assistance: Commons discovery, file-level licence and subject checks, metadata transcription, resized asset preparation, captions/alt text, UI and regression tests. No AI-generated ship images.