About: http://webisa.webdatacommons.org/44275589

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	People define a parameter known as the shear, which in some sense is a vector whose magnitude tells you the semi-major axis of the elliptical shape, and the direction is the direction of the ellipse from some arbitrary reference point.
http://www.w3.org/ns/prov#wasQuotedFrom	physicsforums.com