From World Wind Wiki
|Latest release||1.0 / 2008-02-17|
Global map of shaded land cover from Shaded Relief website. The ocean can be turned off for use with other layers.
 About Natural Earth
Natural Earth is a world physical map at 1.24 km resolution created by Tom Patterson, US National Park Service. Made primarily from data and imagery collected by NASA satellites and graphically enhanced by the NPS, Natural Earth is a base for general mapmaking. The combination of shaded relief and landcover colors brings the physical world to life and encourages readers to explore.