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Structure
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Transportation
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Penn State
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1. Bridges: Chester County, Pennsylvania
2013. Pennsylvania Department of Transportation/Chester County Planning Commission. Bridges in Chester County -- this dataset is primarily derived from PennDOT's Bridge Management System (BMS). Full attribution from BMS is availabl...
2. Retaining Walls: Allegheny County, Pennsylvania
2006. Allegheny County Division of Computer Services Geographic Information Systems Group. The Retaining Wall Feature Dataset contains photogrammetrically compiled Retaining Walls - structures of concrete, brick, stone, wood, etc. retaini...