Jakarta is located on the northwest coast of Java, at the mouth of the Ciliwung River on Jakarta Bay, which is an inlet of the Java Sea. Officially, the area of the Jakarta Special District is 662 km of land area and 6,977 km of sea area. Jakarta lies in a low, flat basin, averaging 7 metres (23 ft) above sea level; 40% of Jakarta, particularly the northern areas, is below sea level, while the southern parts are comparatively hilly. Rivers flow from the Puncak highlands to the south of the city, across the city northwards towards the Java Sea; the most important is the Ciliwung River, which divides the city into the western and eastern principalities. Other rivers include the Pesanggrahan, and Sunter
