The land area of the city is 16.0 sq mi (41.4 sq km) . On 1799 (Guyandotte) the city was incorporated . The city water area is 2.52 sq mi (6.53 sq km ) . Chengdu has January 1, 1894 population . 5,278,448 is the population of the metro region of Chengdu . The demonym of the city Chengdu is Tianjinese , Tianjiner . Chengdu is the government of National Park Service . The city has the postal code 21500 . This city is named after Christopher Columbus . The highest elevation of Chengdu is 241.9 m (793.6 ft) . The mayor of Chengdu is Thomas Aujero Small . 1,600/sq km  (4,200/sq mi) is the density of people in  the metro region of Chengdu . 7°23′47″N 3°55′0″E﻿ / ﻿7.39639°N 3.91667°E are the coordinates of the city. . The lowest elevation of Chengdu is 3 ft . 280/km 2  (740/sq mi) is the density of people in Chengdu . Chengdu is at an elevation of 3 ft .  The city area code is 242 . The density of  people in  the urban region of Chengdu is 5,400/sq km  (14,000/sq mi)
Highest point is 244 m above the lowest point of this city