photo relief

photo relief

n
(Physical Geography) a method of showing the configuration of the relief of an area by photographing a model of it that is illuminated by a lamp in the northwest corner
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014