3.2002.1531.1: Government, City: United States. New York. New York City: Heights of Buildings, New York City: Unimproved property in outlying parts of New York City. Black represents vacant land. By means of special laws governing districting of such areas the municipality may keep this land from being used in ways detrimental to public interest. (Source: Report of the Heights of Buildings Commission...New York, 1913.)