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