About: http://webisa.webdatacommons.org/130113571

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	Since a new coordinate is otherwise calculated when enlarging or narrowing each point, the points are classified into four types A, B, C, and D. A point type is classified according to the eight direction points, as shown in FIG. 5(c).
http://www.w3.org/ns/prov#wasQuotedFrom	google.com