Location

Location and Geography. Indonesia, the world's largest archipelago nation, is located astride the equator in the humid tropics and extends some 2,300 miles (3,700 kilometers) east-west, about the same as the contiguous United States. It is surrounded by oceans, seas, and straits except where it shares an island border with East Malaysia and Brunei on Borneo (Kalimantan); with Papua New Guinea on New Guinea; and with Timor Loro Sae on Timor. West Malaysia lies across the Straits of Malaka, the Philippines lies to the northeast, and Australia lies to the south.

The archipelago's location has played a profound role in economic, political, cultural, and religious developments there. For more than two thousand years, trading ships sailed between the great civilizations of India and China via the waters and islands of the Indies. The islands also supplied

Indonesia

spices and forest products to that trade. The alternating east and west monsoon winds made the Indies a layover point for traders and others from diverse nations who brought their languages, ideas about political order, and their arts and religions. Small and then large kingdoms grew as a result of, and as part of, that great trade. Steamships altered some trade patterns, but the region's strategic location between East and South Asia and the Middle East remains.

Indonesia consists of all or part of some of the world's largest islands—Sumatra, Java, most of Kalimantan (Borneo), Sulawesi (Celebes), Halmahera, and the west half of New Guinea (Papua)—and numerous smaller islands, of which Bali (just east of Java) is best known. These islands plus some others have mountain peaks of 9,000 feet (2,700 meters) or more, and there are some four hundred volcanos, of which one hundred are active. Between 1973 and 1990, for example, there were twenty-nine recorded eruptions, some with tragic consequences. Volcanic lava and ash contributed to the rich soils of upland Sumatra and all of Java and Bali, which have nurtured rice cultivation for several thousand years.

The inner islands of Java, Madura, and Bali make up the geographical and population center of the archipelago. Java, one of the world's most densely settled places (with 2,108 people per square mile [814 per square kilometer] in 1990), occupies 78 percent of the nation's land area but accounts for about 60 percent of Indonesia's population. (About the size of New York state, Java's population is equivalent to 40 percent of that of the United States.) The outer islands, which form an arc west, north, and east of the inner ones, have about 90 percent of the land area of the country but only about 42 percent of the population. The cultures of the inner islands are more homogeneous, with only four major cultural groups: the Sundanese (in West Java), the Javanese (in Central and East Java), the Madurese (on Madura and in East Java), and the Balinese (on Bali). The outer islands have hundreds of ethnolinguistic groups.

Forests of the inner islands, once plentiful, are now largely gone. Kalimantan, West Papua, and Sumatra still have rich jungles, though these are threatened by population expansion and exploitation by loggers for domestic timber use and export. Land beneath the jungles is not fertile. Some eastern islands, such as Sulawesi and the Lesser Sundas (the island chain east of Bali), also have lost forests.

Two types of agriculture are predominant in Indonesia: permanent irrigated rice farming ( sawah ) and rotating swidden or slash-and-burn ( ladang ) farming of rice, corn, and other crops. The former dominates Java, Bali, and the highlands all along the western coast of Sumatra; the latter is found in other parts of Sumatra and other outer islands, but not exclusively so. Fixed rain-fed fields of rice are prominent in Sulawesi and some other places. Many areas are rich in vegetables, tropical fruit, sago, and other cultivated or forest crops, and commercial plantations of coffee, tea, tobacco, coconuts, and sugar are found in both inner and outer islands. Plantation-grown products such as rubber, palm oil, and sisal are prominent in Sumatra, while coffee, sugar, and tea are prominent in Java. Spices such as cloves, nutmeg, and pepper are grown mainly in the outer islands, especially to the east. Maluku (formerly the Moluccas) gained its appellation the "Spice Islands" from the importance of trade in these items. Gold, tin, and nickel are mined in Sumatra, Bangka, Kalimantan, Sulawesi, and Papua for domestic and international markets, and oil and liquified natural gas (especially from Sumatra) are important exports. Numerous rivers flowing from mountainous or jungle interiors to coastal plains and ports have carried farm and forest products for centuries and have been channels for cultural communication.