About: http://webisa.webdatacommons.org/326395362

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	A high degree of accuracy was obtained by using surveying instruments such as a compass, a theodolite, and probably barometers.
http://www.w3.org/ns/prov#wasQuotedFrom	biographi.ca