About: http://webisa.webdatacommons.org/383382019

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	The problem is noise degrades the quality, you need very precise calibration of a reference point that is difficult to communicate, and transmission is a problem because it loses strength the farther it travels.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com