2002. The geodetic control points are the survey reference points registered with the National Geodetic Survey.
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2002. Forest tracts is a base map data layer derived by automated processes and processed for cartographic representation at 1:2400 scale. The polygon f...
2004. The polygon represents future park area in Arlington County, VA.
1. This layer represents 5000 feet by 5000 feet geodetic grid for Prince William County. .
2002. The dataset contains lines that designate the legal geographic boundaries between county, city and township jurisdictions within the outer boundari...
1999. "Bedrock" is one of four layers which collectively describe the subsurface geologic formation, structural geology and surficial deposits. "Bedrock...
1997. "Fault" is one of four layers which collectively describe the subsurface geologic formation, structural geology and surficial deposits. "Fault" is...
1999. "Structure" is one of four layers which collectively describe the subsurface geologic formation, structural geology and surficial deposits. "Struc...
1999. "Surficial" is one of four layers which collectively describe the subsurface geologic formation, structural geology and surficial deposits. "Surfi...
2006. This dataset represents the annotation for the individual polygons to display the geologic units in Arlington County, VA 2006.