Downloaded September 2012 from:
http://visibleearth.nasa.gov/view.php?id=73776

Downloaded file:
world.topo.bathy.200408.3x5400x2700.jpg
Original image file name:
world.topo.bathy.200408.3x5400x2700.jpg

For information on user restrictions, please visit
http://visibleearth.nasa.gov/useterms.php

This page is also available offline in this folder, but note that terms might have changed since data download.