This shapefile shows the outline of the ACE Basin NERR boundary. The boundary followed the description for the NERR boundary and buffer as laid out in the 1992 Final Management Plan for the ACE Basin National Estuarine Research Reserve in South Carolina (see supplemental section). The boundary was hand digitized at 1:5000 from the 2006 NAIP color infrared photography (SCDNR DOQQ electronic imagery), and then it was snapped to the 2008 Beaufort, Colleton, and Charleston county parcel layers. Where parcel layers were not present, the boundary was drawn in accordance with following guidelines established by SCDNR GIS and NERRs staff. Note: Detailed steps used to create the boundary are described in the Process Step section. 1.) Along the western border, the boundary was drawn along the creek-marsh edge of Wimbee Creek, Parrot Creek and Morgan River, passing on the inside of sandbars and small marsh islands. Where privately-owned lands were adjacent to the waterbodies, the boundary was snapped to the Beaufort parcel data layers. 2.) The southern, ocean border was snapped to the Collision Regulations (COLREGS) demarcation line data layer (U.S. Coast Guard). 3.) The northern boundary was digitized to the abandoned Seaboard Coastline Railroad. 4.) The eastern boundary was snapped to Colleton and Charleston county parcel data.In 2012, the boundary was expanded to include Botany Bay Plantation and Fig Island. They were both digitized at 1:5000 off the Charleston county GIS parcel layer.