Who Owns The View?
"Land buyers and developers who are attracted to the same spectacular scenery as visitors to an area ask: Who has the right to tell us what we can do with private property?... The term viewshed is best known from the writings of Frederick Law Olmsted, the 19th-century father of landscape architecture who designed retreats such as New York's Central Park. But according to Niall Kirkwood, chairman of Harvard University's landscape architecture department, the term dates to the Egyptian battlefield, where strategy was determined by whom you could see and who could see you."
Thanks to Chris Steins