The density of  people in  the urban region of Changsha is 3,423/km 2  (8,870/sq mi) . The postal code of the city is EC1701 . Changsha is at an elevation of 15641734 m . The province of the city Changsha is Gauteng . The city water area is 186 km 2  (72 sq mi) .  The city area code is +57 2 . 1,600/sq km  (4,200/sq mi) is the density of inhabitents in  the metro region of Changsha . 1,600/km 2  (4,200/sq mi) (2011) is the density of inhabitents in Changsha . The mayor of Changsha is Oscar Moreno (PDP-Laban) . The city land area is 39.28 sq mi (101.74 km 2 ) . On 1842 the city was incorporated . The highest elevation of Changsha is 2,715 m (8,907 ft) . The city is 178.46 km 2  (68.90 sq mi) in area . The demonym of the city Changsha is cuzqueno/a . The population of the urban region is 2,658,355 . 3,303,786 is the population of the metro region of Changsha . This city is named after Christopher Columbus . Changsha is located in Angkor, Siem Reap, Cambodia . The lowest elevation of Changsha is 865 m 
The peak of the city is at 865 m 