About: http://webisa.webdatacommons.org/113402798

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	That is how LOS works yes: hills do not allow you to see over intervening obstacles, be they units or other terrain.
http://www.w3.org/ns/prov#wasQuotedFrom	daysofwonder.com