About: http://webisa.webdatacommons.org/203026806

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	However, correlating such points is a difficult task, and if the surface is smooth and featureless, there is nothing to correlate.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com