Source:NASA's Scientific Visualization Studio/ Barker, M. K., Mazarico, E., Neumann, G. A., Zuber, M. T., Haruyama, J., Smith, D. E. "A new lunar digital elevation model from the Lunar Orbiter Laser Altimeter and SELENE Terrain Camera," Icarus, Volume 273, p. 346-355. http://dx.doi.org/10.1016/j.icarus.2015.07.039