Türkiye ADM1 geometry: geoBoundaries TUR-ADM1-25984515 (2021 boundaries), build 2023-12-12.
Source: OpenStreetMap via geoBoundaries, https://www.geoboundaries.org/api/current/gbOpen/TUR/ADM1/
Metadata license: Creative Commons Attribution-ShareAlike 2.0; source terms: https://www.openstreetmap.org/copyright
Changes: Mercator projection to a 1200×660 SVG viewBox; Douglas–Peucker simplification at 0.32 viewBox units; coordinates rounded to 0.1; province paths only.
Derived geometry is shared under the same applicable source license. Download the derived dataset at /maps/turkey-paths.json.
Branch data: https://www.ucay.com.tr/sube-ve-lokasyonlar/, retrieved 2026-09-21. 33 entries in 22 cities. Names, addresses and source coordinates preserved.