# Illustration credits

The fictional Skypiea/Upper Yard silhouette adapts [Skypiea.svg by DaniDF1995](https://commons.wikimedia.org/wiki/File:Skypiea.svg), licensed [CC BY-SA 3.0](https://creativecommons.org/licenses/by-sa/3.0/). Changes: extracted coastline, removed labels and topographic detail, monochrome fill, cropped bounds. This adapted silhouette remains CC BY-SA 3.0. One Piece and its fictional locations are created by Eiichiro Oda. This decorative fan reference is never included in real-world quiz data.

The geometric companion characters, introduction scenes, and how-to-play illustrations are original SVG drawings made for WorldIslands. They use simple 2D shapes, subtle cel shading, and expressive cartoon poses. The map scene rotates decorative One Piece island silhouettes on each return to the Name the Land welcome screen.


`one-piece-silhouettes.png` contains stylized, AI-assisted silhouette adaptations of
[Jaya.svg](https://commons.wikimedia.org/wiki/File:Jaya.svg),
[Alabasta.svg](https://commons.wikimedia.org/wiki/File:Alabasta.svg), and
[Isole Sabaody.svg](https://commons.wikimedia.org/wiki/File:Isole_Sabaody.svg)
by DaniDF1995 (Alabasta also edited by Nickanc), all published under
[CC BY-SA 3.0](https://creativecommons.org/licenses/by-sa/3.0/).
Changes: removed labels, sea and terrain details; simplified coastlines into
transparent monochrome illustrations; arranged three silhouettes in a sheet.
These adaptations remain CC BY-SA 3.0. They are decorative fan illustrations,
not canonical coastline measurements or real-world quiz geography.

`home/capital-lisbon.webp` is a crop of [Sentinel-2 cloudless 2016](https://s2maps.eu) by EOX IT Services GmbH (contains modified Copernicus Sentinel data 2016 & 2017), licensed [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/). The traced Lisbon outline is the city's administrative boundary from [OpenStreetMap](https://www.openstreetmap.org/copyright) (ODbL).

`home/capital-washington.webp`, `home/capital-rabat.webp`, `home/capital-seoul.webp`, `home/capital-montevideo.webp` and `home/capital-wellington.webp` are crops of [Sentinel-2 cloudless 2016](https://s2maps.eu) by EOX IT Services GmbH (contains modified Copernicus Sentinel data 2016 & 2017), licensed [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/), built by `scripts/build-capital-posters.py`. The traced city outlines are administrative boundaries from [OpenStreetMap](https://www.openstreetmap.org/copyright) (ODbL); Wellington's is OSM relation 4266321.