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.
Relationship with OSGeo
OSGeo considers Natural Earth a friend in furthering our open geospatial ideals of open source, open standards and open data.
Notable use at OSGeo