About: http://webisa.webdatacommons.org/217914146

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	It us used to discriminte metallic and nonmetallic materials, utility lines, voids, bed rock layers, rebar spacing, concrete floor thickness, and other subsurface anomalies or debris.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca