About: http://webisa.webdatacommons.org/367630587

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	The heading or direction of the grading machine is known, typically from the difference between successive GPS positions but may also be determined from a compass, INS, or other means.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com