Geography and urban development of Dresden past 60 years has made Dresden the fourth largest urban area in Germany after Berlin, Hamburg, and Cologne. The most important river in Dresden is the Elbe river, the only navigable body of water to flow through the city. There are also a number of tributaries such as the river Weißeritz. The nearest German cities are Chemnitz (80 km to the southwest), Leipzig (100 km to the northwest) and Berlin (200 km to the north). The Czech capital Prague is about 150 km to the south; the Polish city of Wrocław is about 200 km to the east. There are
Dresden of some West German communities (the average of the 50 biggest cities is around 35,000 euro). Thanks to the presence of public administration centres, a high density of semi-public research institutes and an extension of publicly funded high technology sectors, the proportion of highly qualified workers Dresden is again among the highest in Germany and by European criteria. Dresden regularly ranks among the best ten bigger cities in Germany to live in. Three major sectors dominate Dresden's economy: Silicon Saxony Saxony's semiconductor industry was built up in 1969. Major enterprises today are AMD's spin-off GLOBALFOUNDRIES, Infineon Technologies, ZMDI and Toppan