About: http://webisa.webdatacommons.org/151892853

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	Instead of performing the transformation on the points you would perform the transformation on the points where w is a value that you can discard if you are only interested in the (x,y) transfomration.
http://www.w3.org/ns/prov#wasQuotedFrom	mathforum.org