| Bassas da India (2005) | Heard Island and McDonald Islands (2004) | |
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| Area | total: 0.2 sq km 
 land: 0.2 sq km water: 0 sq km  | 
				total: 412 sq km 
 land: 412 sq km water: 0 sq km  | 
				
| Area - comparative | about one-third the size of The Mall in Washington, DC | slightly more than two times the size of Washington, DC | 
| Background | This atoll is a volcanic rock surrounded by reefs and is awash at high tide. A French possession since 1897, it was placed under the administration of a commissioner residing in Reunion in 1968. | These uninhabited, barren, sub-Antarctic islands were transferred from the UK to Australia in 1947. Populated by large numbers of seal and bird species, the islands have been designated a nature preserve. | 
| Climate | tropical | antarctic | 
| Coastline | 35.2 km | 101.9 km | 
| Country name | conventional long form: none 
 conventional short form: Bassas da India  | 
				conventional long form: Territory of Heard Island and McDonald Islands 
 conventional short form: Heard Island and McDonald Islands  | 
				
| Dependency status | possession of France; administered by the Administrateur Superieur of the French Southern and Antarctic Lands | territory of Australia; administered from Canberra by the Australian Antarctic Division of the Department of the Environment and Heritage | 
| Diplomatic representation from the US | - | none (territory of Australia) | 
| Diplomatic representation in the US | - | none (territory of Australia) | 
| Disputes - international | claimed by Madagascar | none | 
| Economy - overview | no economic activity | No indigenous economic activity, but the Australian Government allows limited fishing around the islands. | 
| Elevation extremes | lowest point: Indian Ocean 0 m 
 highest point: unnamed location 2.4 m  | 
				lowest point: Indian Ocean 0 m 
 highest point: Mawson Peak, on Big Ben 2,745 m  | 
				
| Environment - current issues | NA | NA | 
| Flag description | the flag of France is used | the flag of Australia is used | 
| Geographic coordinates | 21 30 S, 39 50 E | 53 06 S, 72 31 E | 
| Geography - note | the islands emerge from a circular reef that sits atop a long-extinct, submerged volcano | - | 
| Irrigated land | 0 sq km (1998 est.) | 0 sq km (1998 est.) | 
| Land boundaries | 0 km | 0 km | 
| Land use | arable land: 0% 
 permanent crops: 0% other: 100% (all rock) (2001)  | 
				arable land: 0% 
 permanent crops: 0% other: 100% (2001)  | 
				
| Legal system | the laws of France, where applicable, apply | the laws of Australia, where applicable, apply | 
| Location | Southern Africa, islands in the southern Mozambique Channel, about one-half of the way from Madagascar to Mozambique | islands in the Indian Ocean, about two-thirds of the way from Madagascar to Antarctica | 
| Map references | Africa | Antarctic Region | 
| Maritime claims | territorial sea: 12 nm 
 exclusive economic zone: 200 nm  | 
				territorial sea: 12 nm 
 exclusive fishing zone: 200 nm  | 
				
| Military - note | defense is the responsibility of France | defense is the responsibility of Australia; Australia conducts fisheries patrols | 
| Natural hazards | maritime hazard since it is usually under water during high tide and surrounded by reefs; subject to periodic cyclones | Mawson Peak, an active volcano, is on Heard Island | 
| Natural resources | none | fish | 
| Population | uninhabited (July 2005 est.) | uninhabited (July 2004 est.) | 
| Ports and harbors | none; offshore anchorage only | none; offshore anchorage only | 
| Terrain | volcanic rock | Heard Island - 80% ice-covered, bleak and mountainous, dominated by a large massif (Big Ben) and an active volcano (Mawson Peak); McDonald Islands - small and rocky |