1. This polygon layer represents the grid line edges of the Fairfax county.
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1. This layer depicts the agriculture/forest districts in Fairfax County, VA.
1. This dataset represents the cartographic lines in the Fairfax County, VA.
1. This dataset represents the Cartographic points in the Fairfax county, VA.
1. This polygon layer represents the census block groups of Loudoun County,2000.
1. This polygon layer represents the census blocks for the county of Loudoun, 1990.
1. This polygon layer represents the boundaries of census blocks of Loudoun County, VA 2000.
1. This polygon layer represents the census tracts of Prince William County, VA .
1. This polygon layer represents the boundaries of Virginia's Congressional Districts for Prince William County, VA.
1. This data layer contains points representing culverts located in water networks and marsh areas in Prince William County,VA. Culverts are structure...