@United States:Geography
Location: North America, bordering both the North Atlantic Ocean and the North Pacific Ocean, between Canada and Mexico
Map references: North America
Area:
total area: 9,372,610 sq km
land area: 9,166,600 sq km
comparative area: about half the size of Russia; about three-tenths
the size of Africa; about one-half the size of South America (or
slightly larger than Brazil); slightly smaller than China; about two
and one-half times the size of Western Europe
note: includes only the 50 states and District of Columbia
Land boundaries: total 12,248 km, Canada 8,893 km (including 2,477 km with Alaska), Cuba 29 km (US Naval Base at Guantanamo Bay), Mexico 3,326 km
Coastline: 19,924 km
Maritime claims: contiguous zone: 12 nm continental shelf: not specified exclusive economic zone: 200 nm territorial sea: 12 nm
International disputes: maritime boundary disputes with Canada (Dixon Entrance, Beaufort Sea, Strait of Juan de Fuca, Machias Seal Island); US Naval Base at Guantanamo Bay is leased from Cuba and only mutual agreement or US abandonment of the area can terminate the lease; Haiti claims Navassa Island; US has made no territorial claim in Antarctica (but has reserved the right to do so) and does not recognize the claims of any other nation; Republic of Marshall Islands claims Wake Island
Climate: mostly temperate, but tropical in Hawaii and Florida and arctic in Alaska, semiarid in the great plains west of the Mississippi River and arid in the Great Basin of the southwest; low winter temperatures in the northwest are ameliorated occasionally in January and February by warm chinook winds from the eastern slopes of the Rocky Mountains
Terrain: vast central plain, mountains in west, hills and low mountains in east; rugged mountains and broad river valleys in Alaska; rugged, volcanic topography in Hawaii