190. This polygon coverage uses a single line to represent the County boundary.
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2002. Loudoun County was founded and surveyed in 1757. Loudoun's boundary with Maryland is the mean low water mark of the Potomac River on the Virginia s...
2008. This polyline layer represents the planned county road lines in 2008.
2001. This feature class includes existing and planned alignments, functional classification, planned interchanges, scenic byways and ultimate roadway ge...
1. This data layer contains points representing culverts located in water networks and marsh areas in Prince William County,VA. Culverts are structure...
2002. Drainage is a base map data layer derived by automated processes and processed for cartographic representation at 1:2400 scale. The line features ...
2004. This polygon represents drive way of Arlington County, VA 2004.
2010. This polygon layer represents the Paved Driveway located in Arlington County, VA 2010.
2004. This polygon represents easement area (property subdivision) in Arlington County, VA 2004.
1980. This polygon layer represents the election districts of Loudoun County, VA 1980.