2005. This dataset represents the Computer Assisted Mass Appraisal database in Washington, DC 2005.
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1. This polygon layer represents the boundaries of Virginia's Congressional Districts for Prince William County, VA.
1997. This layer contains contours that were derived from the digital terrain model made up of irregularly spaced mass points and break lines. The contou...
2008. This dataset represents the points showing location and attributes of survey control monuments in Arlington County, VA 2008.
2008. This polygon layer represents the jurisdictional annotation for 1"=100' scale maps in Arlington County, VA 2008.
190. This polyline layer represents the length area of the Arlington County, VA.
190. This polygon coverage uses a single line to represent the County boundary.
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...