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GIS Data

USGS is a primary source of geographic information system (GIS) data. Our data and information is presented in spatial and geographic formats, including The National Map, Earth Explorer, GloVIS, LandsatLook, and much more. Explore GIS Data Maps. 

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Map showing areas serviced by public water-supply agencies in 1973 greater Pittsburgh region, southwestern Pennsylvania Map showing areas serviced by public water-supply agencies in 1973 greater Pittsburgh region, southwestern Pennsylvania

Urban water planning, development, and management are many sectored, costly efforts, subject to a multitude of controls and demands including those imposed by nature. One primary concern in development is for providing a dependable and safe water supply. In spite of a bountiful natural availability, the process of satisfying consumer needs involves the resolution of a variety of problems...
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