Borders: historical-basemaps by André Ourednik (GPL-3.0). Satellite imagery: NASA Visible Earth, Blue Marble; close-up imagery and shaded relief streamed from NASA GIBS (Blue Marble 500 m; ASTER GDEM, NASA/METI); modern-day 10 m imagery: EOxCloudless 2024 by EOX IT Services GmbH, contains modified Copernicus Sentinel data (CC BY-NC-SA 4.0). Rivers, lakes and terrain: Natural Earth. Pictures: Wikimedia Commons, with each image's author and licence shown next to it.