About: http://webisa.webdatacommons.org/7150317

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	Simply put for our purposes, an isosurface is a surface created by applying one or more functions -- whose domain is the entire real 2D plane ??? onto the screen (or game map).
http://www.w3.org/ns/prov#wasQuotedFrom	gamedev.net