About: http://webisa.webdatacommons.org/16145631

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 calibration method according to claim 2, wherein the predetermined plane is a horizontal plane and the direction perpendicular to the plane is a vertical direction.4.
http://www.w3.org/ns/prov#wasQuotedFrom	patentgenius.com