Topo map of Lake Mead areal - screenshot from World Wind showing the flat map (top) and the shaded version (bottom - with ligh source in the upper left corner)

This image is in the public domain because it is a screenshot from NASA ’s globe software World Wind using a public domain layer, such as Blue Marble, MODIS, Landsat, SRTM, USGS or GLOBE. العربيَّة | English | فارسی | français | עברית | македонски | മലയാളം | Nederlands | русский | 中文（中国大陆）‎ | +/−