World geometry: Natural Earth, ne_110m_admin_0_countries (public domain).
https://github.com/nvkelso/natural-earth-vector/blob/master/geojson/ne_110m_admin_0_countries.geojson
https://www.naturalearthdata.com/about/terms-of-use/
Türkiye province geometry: cihadturhan/tr-geojson, geo/tr-cities-utf8.json, derived from OpenStreetMap.
https://github.com/cihadturhan/tr-geojson
© OpenStreetMap contributors, ODbL 1.0: https://www.openstreetmap.org/copyright
Geometry projected and rounded for a simplified travel journal illustration; not for navigation or administrative decisions.
Country selector supplements map labels with ISO alpha-2 region codes, localized by the runtime Intl.DisplayNames / Unicode CLDR.