About: http://webisa.webdatacommons.org/284841676

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 cost about $100, and has been very helpful laying out lines. 30 feet is an exaggeration, though, unless you are working with low light levels.
http://www.w3.org/ns/prov#wasQuotedFrom	woodenboat.com