The province of the city Derby is Sichuan . The city water area is 0.37 sq mi (0.95 km 2 ) . The highest elevation of Derby is 91 m (299 ft) . The city is 68.17 sq mi (176.56 sq km) in area . The demonym of the city Derby is Santiaguinos  (- as ) . The city land area is 225.73 sq km  (87.15 sq mi) . 850/km 2  (2,200/sq mi) is the density of inhabitents in Derby . The city was incorporated in 1799 (Guyandotte) . 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 . Kakha Kaladze is the mayor of Derby . The city has the postal code 9XXXXXX . 2,200/km 2  (5,700/sq mi) is the density of residents in  the metro region of Derby . Derby is named for Rao Jodha . Derby is at an elevation of 20 ft .  The city area code is +82-53 . The Derby citys' lowest elevation is 190 m  . The density of  people in  the urban region of Derby is 7,500/km 2  (19,000/sq mi) . The urban region is 335.4 sq mi (539.7 km 2 ) in area
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