About: http://webisa.webdatacommons.org/444194541

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	This calibration method allows the compass to tell the difference between Earths magnetic field and those fields generated by artificial sources such as the steel body of your vehicle or other electronic devices.
http://www.w3.org/ns/prov#wasQuotedFrom	b-roll.net