| http://www.w3.org/ns/prov#value | - In the 1990s it was radar, in which the University was a world leader, using it for archaeological research (my honours and PhD theses at Sydney both revolved around using it at Angkor); in the late 1990s and early 2000s it was very high-resolution conventional imagery, of the kind we commonly see these days in Google Earth; in the last few years, it has been lidar (see accompanying article).
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