About: http://webisa.webdatacommons.org/202966080

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	one of a predetermined angle about a perpendicular to the surface or an angle oblique to the surface, while light incident on same surface at angles other than the viewing angle is primarily diffused or scattered.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au