# Map data

Made with Natural Earth. Public domain.

- https://www.naturalearthdata.com/about/terms-of-use/
- https://github.com/nvkelso/natural-earth-vector/blob/master/geojson/ne_10m_admin_1_states_provinces.geojson

Japan's 47 prefectures were extracted by adm0_a3=JPN, simplified and projected using Mercator with one uniform scale for both projected axes. City points use the same projection. Some small islands are omitted. Tile, hex, routes and floor plans are schematic. All displayed values, points and routes are synthetic demonstration data, not official statistics or navigation guidance.