About: http://webisa.webdatacommons.org/102477169

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	Along a river or other waterbody with a nearby marked navigation channel, the perpendiculars are constructed using the nearest limit of the channel rather than using the line of deep water.
http://www.w3.org/ns/prov#wasQuotedFrom	jdsupra.com