About Indonesia
 

 

 

 

 

GEOGRAPHY
   

Indonesia is the largest archipelago in the world with the total number of 17.508 islands according to the Indonesian Naval Hydro Oceanographic office. The archipelago is spread over on a crossroads between two oceans. The Pacific and the Indian ocean. And bridges two continents Asia and Australian.

 

The Pacific Ocean, on the east and on the north by the South China Sea. The Asian continent in the north and the Australian continent in the south. This strategic position has always influenced the cultural, social, political and economic life of the country.

 

The territory of the Republic of Indonesia stretches from 6º 08’ north latitude to 11º  15’ south latitude, and from 94º  45’ to 141º 05’ east longitude. The Indonesian sea area is four times greater than its land area. Which is about 1.9 million sq. km. The sea area is about 7.9 million sq. km (including an exclusive economic zone) and constitutes about 81% of the total area of the country.

 

The archipelago is divided into three groups. The islands of Java, Sumatra and Kalimantan, and the small islands in between, lie on the Sunda Shelf which begin on the coast of Malaysia and Indo China, where the sea depth does not exceed 700 feet. Irian Jaya which is part of the island of New Guinea, and the Aru Island lie on the Sahul Shelf, which stretches northwards from the Australian coast. Here the sea depth is similar to that of the Sunda Shelf.

 

Sumatra, which is about 473.606 sq. km, in size; the most fertile and densely populates island, Java/Madura, 132,127 sq. km; Kalimantan, which comprises two-third of the island of Borneo and measures 539.460 sq. km; Sulawesi, 189,216 sq. km; and Irian Jaya, 421,981 sq. km, which is part of the world’s second largest island, New Guinea, are the country’s bigger islands in size. Indonesia’s other islands are smaller in size.

 

Indonesia is formed from the past as the “Ring of Fire” that girds the Pacific Ocean. Volcanoes have not only brought earthquake and disasters, but also fertility to the ground and abundant supply of mineral deposits.

 

The most famous Indonesian volcano is the Krakatau, situated in the Sunda Straits between Sumatra and Java. Its huge explosion in 1883 had a wide impacts on other islands, and its smoke was blown far away to Europe. Mount Agung in Bali exploded in 1963, but later brought more fertility to the island. The Balinese venerate the mountain as the abode of the gods, and mother – temple of Bali at Besakih nestles on its slopes.

 

Mount Merapi in Central Java is active. Its crater-lake is a potential danger every time when the volcano becomes active and its waters boil. During lulls, the cooled down lava flows can be followed almost to the top.

 

Mount Rinjani on the island of Lombok is another favourite destination for climbers. And Mount Kelimutu in Flores hides lakes with three different colours, marine blue, aqua marine green and coca-cola brown red, reflecting the colour or their various silt deposits.

 

Although located in the tropics, the Jaya Wijaya in Irian Jaya is an all year – round snowclad mountain. Treks across wild Irian Jaya are a favourite with German and French visitors. Where rivers have cut the foothills into the georgeously created the beautifully picturesque Ngarai Sianok canyon on the edge of the town of Bukit-tinggi.

 

Lake Maninjau in West Sumatra offers a majestic scene of clear blue waters and looming mountain sides. Wacth out for hairpin bends that wind down all the way to the lake’s shores. West Sumatra, with its beautiful landscapes and distinct Minangkabau cultures is ideal for mountain biking.

 

Further north, the extinct volcanoes of North Sumatra are a pleasure to see and to trek. Where, volcanoes have formed lakes, deep and powerful waterfalls and long rivers. Lake Toba is the dramatic centrepiece of the sea, nestled in the Bukit Barisan ranges with 100 km long, as the largest lake in Southeast Asia and one of the deepest and highest in the world.

 

The island of Samosir, situated in central the lake, is equal in size to the island of Singapore. Where is the heart of Batak culture, the ethnic group that inhabits this stunning highland of hills and waterfalls. On the island there are megalithic monuments, artefacts and traditional Batak villages, that can be visited on scenic boat trip.

 

The longest rivers in Indonesia is Kapuas River located in West Kalimantan around 1.143 km. The other rivers are Musi River in Palembang, South Sumatra, Batanghari River in Jambi Province, Asahan River in North Sumatra, Bengawan Solo River and Berantas River in Central and East Java and Memberamo in West Papua.

 

Volcanoes, with year round sunshine cooling rains and warm weather have made these Indonesian islands fertile grounds for plants and animal life.

 

Climate

 

Indonesia has a tropical monsoon-type climate, characterized by slight changes of season and temperature, low winds, high degree of humidity and periodical heavy rainfall.

 

It has two monsoons. The East Monsoons or dry season runs from May to September and is influenced by the Australian continental air masses. The west monsoon or rainy season runs from December to March and is influenced by the Asian continental and Pacific Ocean air masses.

 

Average temperatures area are classified as follows: Coastal plains: 28º C; inland and mountain areas: 26º C; higher mountain areas: 23º C, varying with the altitude.

 

Indonesia has an average relative humidity between 70% and 90% with a minimum of 73% and a maximum of 87%.

TERRITORIAL WATERS AND EXCLUSIVE ECONOMIC ZONE 

When independence was proclaimed and sovereignty gained, Indonesia had to enact laws to govern the seas in accordance with the geographic structure of an archipelagic state. This, however, did not mean that the country would bar international passage. The laws were necessary instruments for the unity and national resilience of the country, with a territory that embraces all the islands, the islets and the seas  in between.

In view of the country's susceptibility to foreign intervention from the sea and for domestic security reasons, on December 13, 1957, the Indonesian Government issued a declaration on the territorial waters of the Republic. It stated that all the waters surrounding and between the islands in the territory came within Indonesia's sovereignty. It also determined that the country's territorial water limit was  12 miles, measured from a straight baseline drawn from the outermost points of the islands.

In the past, archipelagic states like Indonesia have unilaterally determined their 200-mile-Exclusive Economic Zones. Today such economic zones are confirmed by the International Convention on the Law of the Sea, which was ratified by the Indonesian Government on October 18. 1983. by Act No. 5 of the same year. This is the legal basis of the Indonesian-Exclusive Economic Zone.

INDONESIA STANDARD TIME 

As of January 1, 1988, Indonesia's three time zones have been changed as below:

  1. Western Indonesia Standard Time equals GMT plus 7 hours (meridian 105°E), covering all provinces in  Sumatra and Java. the provinces of West and Central Kalimantan.

  2. Central Indonesia Standard Time equals GMT plus 8 hours (meridian 120°E),   covering the provinces of East and South  Kalimantan, all  provinces in Sulawesi, and the provinces of West   and East Nusatenggara and East Timor.

  3. Eastern Indonesia Standard Time equals GMT plus 9 hours (meridian 135°E),     covering the provinces of Maluku and  Irian Jaya.

 

 

 

 

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Copyright © 2003 Indonesian Consulate, Chicago, IL USA