Natural Earth: Free Vector and Raster Map Data

Eine reichhaltige Sammlung von GIS-Daten (administrative Umrisse, Ozeane, Flüsse, Seen, Städte; verschiedene auf dem Relief beruhende Raster) auf globalem Niveau. Hier ein Beispiel für die Länderumrisse (1:10 Mio.):

Natural Earth is a public domain map dataset available at 1:10m, 1:50m, and 1:110 million scales. Featuring tightly integrated vector and raster data, with Natural Earth you can make a variety of visually pleasing, well-crafted maps with cartography or GIS software.
Natural Earth was built through a collaboration of many volunteers and is supported by NACIS(North American Cartographic Information Society), and is free for use in any type of project.