About: http://webisa.webdatacommons.org/91519732

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	If performance is an issue and accuracy less important, for small distances Pythagoras???
http://www.w3.org/ns/prov#wasQuotedFrom	movable-type.co.uk