Outlines of parking areas within Washington State Parks. Updated July 21, 2020.Attribute Definitions: ParkName - The name of the WA State Park that contains the parking area. Surface - The surface of the parking area, if known. Paved, gravel, native material, etc. Capacity - Number of standard automobile parking spots, where visible in aerial photography. Typically only for paved parking areas with striping visible. Acres - The area of the metal detection area polygon, in acres, as calculated in GIS (ArcGIS Pro).