This polygon layer represents the boundary of neighborhood conservation areas (NCA). The Neighborhood Conservation Area geodatabase consists of three feature classes, NCA_ARC, NCA_POLY and NCA_BUFFER. The NCA feature classes delineate the areas of Arlington County where a conservation area have been defined, and denotes those with County-approved conservation plans. Annotation identifies the areas by name. The NCA_BUFFER feature class also shows the conservation areas, but uses a “buffered” line, or a band of color (or fill pattern) inside the perimeter.