About: http://webisa.webdatacommons.org/432806050

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	Surveyor's Chain Basic surveying devices and methods, including rope, poles, grape vines, and pacing, have existed for many years, but most of the tools commonly associated with surveying were developed during the 1600s.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com