Coastal Barrier Resources System
Ecological Services

Digital CBRS Boundaries

The U.S. Fish and Wildlife Service (Service) has geospatial Coastal Barrier Resources System (CBRS) polygon data available in a variety of formats. The CBRS polygons are only representations of the official CBRS boundaries and are not to be considered authoritative. In general, these digital boundaries can be considered accurate to within approximately 20 feet of the actual CBRS boundaries as shown on the official maps. For information on the horizontal accuracy of this digital data set, please read the metadata and see the "CBRS Buffer Zone" layer.

Additionally, because CBRS units extend seaward out to either the 20- or 30-foot bathymetric contour (depending on the location of the unit), the true seaward extent of the units is not shown. The Service is not responsible for any misuse or misinterpretation of this digital data set, including use of the data to determine eligibility for federal financial assistance such as federal flood insurance. For information on obtaining an official determination of whether or not an area or specific property is located within the CBRS, please visit the Determinations web page.  For information on project consultations, please visit the Consultations web page.

Download Shapefile(s)

The CBRS polygons are available for download as a Shapefile; compressed by using the .zip format. You can view the Shapefile by using ESRI's ArcGis Explorer free software, among others.

Web Map Service (WMS)

Geospatial Coastal Barrier Resources System Data is also available through an Open GIS Consortium (OGC) Web Map Service (WMS).

  • WMS service name:CBRAMapper/GeoCBRA
  • Projection: GCS, NAD83
  • OGC Version: 1.3
  • CBRS Data WMS Address:

Connecting to the CBRS WMS in ESRI's ArcGIS:

  • Launch ArcCatalog.
  • Under the “GIS Servers” directory in the explorer window on the left, double click on “Add WMS Server” to open the Add WMS Server dialog box.
  • Enter the following WMS address in the URL text box: CBRS Data WMS address:
  • Click on the “Get Layers” button to view the service and layer information.
  • Click on the “OK” button to add the connection and view it in ArcCatalog. You will see the connection show up under “GIS Servers”
  • This WMS connection will now also be available in ArcMap under “GIS Servers” after you select “add data”.


ArcGIS Representational State Transfer (REST) Service


CBRS Mapper

Users are able to view the CBRS data using the CBRS Mapper.
Last updated: May 10, 2017