Tom Patterson, of the US National Parks Service, has assembled what he calls a natural view of the earth. Essentially, it takes land cover data and digital elevation models and combines them to render a natural-looking view of the earth. He has done this for the entire globe at a resolution of 150 dpi with dimensions of 16,200 pixels high by 32,400 pixels wide. Various versions of the images are available for downloading. All images are geo-referenced.