2002. This polygon layer represents the boundary of District of Columbia in 2002
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2005. This polygon layer represents the Bridges and polygons in Washington, DC 2006.
5. This dataset represents the Building restriction lines in Washington, DC .
7. This dataset represents the Business Improvement Districts in Washington, DC 2007. The dataset contains locations and attributes of the six BID jur...
2002. ThIS dataset represents the locations and attributes of Cemeteries in Washington, DC 2002.
2003. Unofficial Census blocks boundaries for the District of Columbia. These boundaries were compiled from an unofficial U.S. Census TIGER/line product...
1930. This polygon layer represents the Census Tract (1930?) in Washington, DC 1930.
1930. This polygon layer represents the Census Tract (1940) in Washington, DC 1940.
1930. This polygon layer represents the Census Tract (1950) in Washington, DC 1950.
1930. This polygon layer represents the Census Tract (1960) in Washington, DC 1960.