 Of the rest of the land, or 23.0% is settled (buildings or roads), or 0.7% is either rivers or lakes and or 0.4% is unproductive land.Of the built up area, industrial buildings made up 5.1% of the total area while housing and buildings made up 7.6% and transportation infrastructure made up 7.8%.Power and water infrastructure as well as other special developed areas made up 1.8% of the area.