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Author
Allegheny County Division of Computer Services Geographic Information Systems Group
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Subject
Inland Waters
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Subject
Hydrology
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Vector
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1. Hydrology Areas: Allegheny County, Pennsylvania
2016. Allegheny County Division of Computer Services Geographic Information Systems Group. Rivers, Lakes, Ponds, Reservoirs, Hidden Lakes, Reservoirs or Ponds: If greater than 25 feet and less than 30 feet wide, is captured as a double li...
2. Hydrology Lines: Allegheny County, Pennsylvania
2016. Allegheny County Division of Computer Services Geographic Information Systems Group. Rivers, Lakes, Ponds, Reservoirs, Hidden Lakes, Reservoirs or Ponds: If greater than 25 feet and less than 30 feet wide, is captured as a double li...
3. Watersheds: Allegheny County, Pennsylvania
2000. Allegheny County Division of Computer Services Geographic Information Systems Group. Polygons marking borders of watersheds in Allegheny county.