About: http://webisa.webdatacommons.org/252832339

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	It should be appreciated that a set of layers, such as top and bottom, might be unavailable for user modification to ensure control of the viewing display.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com