Derby is located in Magelang, Central Java . The coordinates of the city are 8°3′S 34°54′W﻿ / ﻿8.050°S 34.900°W . The Derby city highest elevation is 91 m (299 ft) . 850/km 2  (2,200/sq mi) is the density of inhabitents in Derby . On 1799 (Guyandotte) the city was incorporated . The demonym of the city Derby is Santiaguinos  (- as ) . The city is 68.17 sq mi (176.56 sq km) in area . 7,500/km 2  (19,000/sq mi) is the density of inhabitents in  the urban region of Derby . The city has the postal code 9XXXXXX . The lowest elevation of Derby is 620 ft . The land area of the city is 225.73 sq km  (87.15 sq mi) . Derby is at an elevation of 6 m . The urban region is 335.4 sq mi (539.7 km 2 ) in area . The density of  residents in  the metro region of Derby is 2,200/km 2  (5,700/sq mi) . The city water area is 0.37 sq mi (0.95 km 2 ) . Kakha Kaladze is the mayor of Derby . Derby is named for Rao Jodha . The city Derby province is Sichuan .  The city area code is +82-53
Highest point is -99 m above the lowest point of this city