Jakarta is the capital city of the Republic of Indonesia . DKI Jakarta Province is divided into five Administrative City areas and one Administrative Regency with a total area of 662.33 km².
Central Jakarta Administrative City with an area of 48.13 km², North Jakarta with an area of 146.66 km², West Jakarta with an area of 129.54 km², South Jakarta with an area of 141.37 km², East Jakarta with an area of 188.03 km², and Administrative District The Thousand Islands with an area of 8.70 km².
The northern part of Jakarta stretches for 32 km along the coast which is the mouth of 13 (thirteen) rivers, 2 (two) canals and 2 (two) floodways . To the south and east it is bordered by Depok City, Bogor Regency, Bekasi City and Bekasi Regency, to the west by Tangerang City and Tangerang Regency, and to the north by the Java Sea.
The city of Jakarta generally has a hot climate with an average air temperature of 28.5°C. The maximum temperature ranges from 33.8°C – 35.2°C during the day, and the minimum temperature ranges from 23.0°C - 24.6°C during the last night recorded in 2021. The average rainfall throughout 237.96 mm, during the 2002-2006 period, the lowest rainfall was 122.0 mm in 2002 and the highest was 267.4 mm in 2005, with humidity levels reaching 73.0-78.0 percent and average wind speeds. -average reaches 2.2 m/sec-2.5 m/sec.
Geologically, the entire plain consists of Pleistocene deposits which are found at ±50 m below the ground surface. The southern part consists of an alluvial layer , while the coastal lowlands extend inland for about 10 km. Underneath there is an older layer of sediment that is not visible on the ground surface, because it is completely buried by alluvium deposits .
In the northern region, these deposits are found at a depth of 10-25 m, the further south the hard surface gets shallower, up to 8-15 m. In certain parts there is also a hard surface layer of soil with a depth of 40 m .