 Of this area, or 34.8% is used for agricultural purposes, while or 6.7% is forested.Of the rest of the land, or 40.2% is settled (buildings or roads), or 17.1% is either rivers or lakes.Of the built up area, industrial buildings made up 6.1% of the total area while housing and buildings made up 11.0% and transportation infrastructure made up 15.9%.