1. This polygon layer represents the boundaries of census blocks of Loudoun County, VA 2000.
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2003. Unofficial Census blocks boundaries for the District of Columbia. These boundaries were compiled from an unofficial U.S. Census TIGER/line product...
2006. The dataset represents the Annotation for Census Tract in Arlington County,VA 200.
2006. This dataset represents the Census Tract Boundaries in Arlington County, VA 2006.
1. This polygon layer represents the census tracts of Prince William County, VA .
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.
1930. This polygon layer represents the Census Tract (1970) in Washington, DC 1970.