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University
GNIS: Man-made features/structures (2013)
Earth Data Analysis Center, University of New Mexico —
The Geographic Names Information System (GNIS) is the Federal standard for geographic nomenclature. The U.S. Geological Survey developed the GNIS for the U.S. Board... -
Hidden Bridges
District of Columbia —
Bridge and tunnel entrance. The dataset contains polygons representing planimetric bridge and tunnel entrances, created as part of the DC Geographic Information System... -
Bridge and Tunnel Entrances 2008
District of Columbia —
Bridges and Tunnels. The dataset contains polygons representing planimetric Bridges and Tunnels, created as part of the DC Geographic Information System (DC GIS) for... -
Bridge and Tunnel Entrances 2019
District of Columbia —
Bridge and Tunnel Entrance. The dataset contains polygons representing planimetric bridge and tunnel entrances, created as part of the DC Geographic Information System... -
Bridge and Tunnel Entrances 2005
District of Columbia —
Bridges and Tunnels. The dataset contains polygons representing planimetric bridges and tunnels, created as part of the DC Geographic Information System (DC GIS) for... -
Bridge and Tunnel Entrances 2010
District of Columbia —
Bridges and Tunnel. The dataset contains polygons representing planimetric bridge and tunnel entrances, created as part of the DC Geographic Information System (DC... -
Bridge and Tunnel Entrances 2015
District of Columbia —
Bridge and Tunnel Entrance. The dataset contains polygons representing planimetric bridge and tunnel entrances, created as part of the DC Geographic Information System... -
Bridge and Tunnel Entrances 2017
District of Columbia —
Bridge and Tunnel Entrance. The dataset contains polygons representing planimetric bridge and tunnel entrances, created as part of the DC Geographic Information System... -
Bridge and Tunnel Entrances 2021
District of Columbia —
Bridges: All bridges are digitized as polygons. Bridges carry roads or railroads over water. Outside edges of all bridges delineated. Also bridge deck locations or... -
Bridge and Tunnel Entrances
District of Columbia —
Bridges: All bridges are digitized as polygons. Bridges carry roads or railroads over water. Outside edges of all bridges delineated. Also bridge deck locations or...