The Maldives holds the record for being the lowest country in the world, with a maximum natural ground level of only 2.3 m (7½ ft), though in areas where construction exists this has been increased to several metres. Over the last century, sea levels have risen about 20 centimetres (8 in); further rises of the ocean could threaten the existence of Maldives.
The first accurate maritime charts of this complex Indian Ocean atoll group were the British Admiralty Charts. In 1834-36 Capt. Robert Moresby, assisted by Lieutenants Christopher and Young, undertook the difficult cartography of the Maldive Islands. The resulting charts were printed as three separate large maps by the Hydrographic Service of the Royal Navy.
A tsunami in the Indian Ocean caused by the 2004 Indian Ocean earthquake caused serious damage to the socioeconomic infrastucture which left many people homeless, and irreversible damage to the environment. After the disaster, cartographers are planning to redraw the maps of the islands due to alterations caused by the tsunami.
On April 22, 2008, Maldives President Maumoon Abdul Gayoom pleaded for a cut in global greenhouse gas emissions, warning that rising sea levels could submerge the island nation of Maldives.
The reef is composed of coral debris and living coral. This acts as a natural barrier against the sea, forming lagoons. Other islands, set at a distance and parallel to the reef, have their own protective fringe of reef. An opening in the surrounding coral barrier allows access to the calmer lagoon waters.
The barrier reefs of the islands protect them from the storms and high waves of the Indian Ocean. The Indian Ocean has a great effect on the climate of the country by acting as a heat buffer, absorbing, storing, and slowly releasing the tropical heat. The heat is further mitigated by cool sea breezes.
A layer of humus six inches (152 mm) thick forms the top layer of soil on the islands. Below the humus layer are two feet of sandstone, followed by sand and then fresh water. Due to excessive salt in the soil near the beach, vegetation is limited there to a few plants such as shrubs, flowering plants, and small hedges. In the interior of the island, more vegetation such as mangrove and banyan grow. Coconut palms, the national tree, are able to grow almost everywhere on the islands and are integral to the lifestyle of the natives.
The limited vegetation is supplemented by the abundance of coral reefs and marine life
The island of Bali lies 3.2 km (2 mi) east of Java, and is approximately 8 degrees south of the equator. East to west, the island is approximately 153 km (95 mi) wide and is approximately 112 km (69 mi) north to south; it's land area is 5,632 km². The highest point is Mount Agung at 3,142 m (10,308 feet) high, an active volcano that last erupted in March 1963. Mountains cover centre to the eastern side, with Mount Agung the easternmost peak. Mount Batur (1,717 m) is also still active; an eruption 30,000 years ago was one of the largest known volcanic events on Earth.
