quality:correction, structural:summarization
Geography

The territory is an archipelago of 55 islands, the largest being Diego Garcia, the only inhabited island, which accounts for almost half of the territory's total land area (60 square kilometres (23 square miles)). The terrain is flat and low, with most areas not exceeding two metres (6 ft 7 in) above sea level. In 2010, 545,000 square kilometres (210,000 square miles) of ocean around the islands was declared a marine reserve.

The British Indian Ocean Territory (Constitution) Order 2004 defines the territory as comprising the following islands or groups of islands:

As indicated above, the territory also included Aldabra, Farquhar and Desroches between 1965 and 1976; the latter group of islands is located north of Madagascar and were annexed from and returned to the Seychelles.