Bridges, Buildings, and Street Pavement area as derived from lidar data in 2013 and digitized from aerial photography with ad hoc updates. The field “Layer” delineates if the record is a bridge, building, or road. This is typically used as a cartographic layer and not an impervious surface assessment; however, it may be useful as a proxy measure for built-upon area estimations. For example, areas with more buildings and pavement will probably have more impervious surface, but this layer does not account for private parking lots, swimming pools, or other impervious features. Data is updated by an automated process using FME. Note to administrators, do not rename or move this feature service without updating underlying FME process.