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GNIS: Oilfields, Mines, Dams, Towers, Man-made structures
The Geographic Names Information System (GNIS) actively seeks data from and partnerships with Government agencies at all levels and other interested organizations. The GNIS is... -
Bridge and Tunnel Entrances 2008
Bridges and Tunnels. The dataset contains polygons representing planimetric Bridges and Tunnels, created as part of the DC Geographic Information System (DC GIS) for the D.C.... -
Bridge
The planimetric data was compiled by The Sanborn Map Company, Inc for the Metropolitan District and is based on an aerial flight performed in April 2015. In addition, the City's...