Abstract:

This Coastal Barrier Resources System (CBRS) data set, produced by the U.S. Fish and Wildlife Service (Service), contains areas designated as undeveloped coastal barriers in accordance with the Coastal Barrier Resources Act (CBRA), 16 U.S.C. 3501 et seq., as amended. The boundaries used to create the polygons herein were compiled between 12/6/2013 and 12/16/2016 from the official John H. Chafee Coastal Barrier Resources System CBRS maps. The boundaries of the CBRS Units in Connecticut, Massachusetts, Rhode Island, and the Long Island portion of New York, were digitized from the official paper maps according to the guidelines in a notice published in the Federal Register on August 29, 2013 (see the "Georeferencing and Boundary Interpretation" and "Boundary Transcription" sections of 78 FR 53467; available at https://www.federalregister.gov/d/2013-21167). In all other cases where the official map was created through digital methods, the digital boundary was used. These digital polygons are only representations of the CBRS boundaries shown on the official CBRS maps and are not to be considered authoritative. 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. CBRS maps are either enacted by Congress or adopted administratively by the Secretary of the Interior (Secretary), and are maintained by the Service. As maps are revised, this data set will be updated with the new boundaries. Copies of the official CBRS maps are available for viewing at Service s Headquarters office and are also available to view or download at https://www.fws.gov/ecological-services/habitat-conservation/cbra/Maps/index.html. CBRS boundaries viewed using the CBRS Mapper or the shapefile are subject to misrepresentations beyond the Service s control, including misalignments of the boundaries with third party base layers and misprojections of spatial data. The official CBRS map is the controlling document and should be consulted for all official determinations. Official determinations are recommended for all properties that are in close proximity (within 20 feet) of a CBRS boundary. For an official determination of whether or not an area or specific property is located within the CBRS, please follow the procedures found at https://www.fws.gov/ecological-services/habitat-conservation/cbra/Determinations.html. For any questions regarding the CBRS, please contact your local Service field office or email CBRA@fws.gov. Contact information for Service field offices can be found at http://www.fws.gov/offices. This is an update to the FGDL dataset CBRS_MAR16.

Supplemental_Information:

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.

SOURCE: https://www.fws.gov/cbra/maps/Boundaries.html

User must read and fully comprehend the metadata prior to data use. User must acknowledge the U.S. Fish and Wildlife Service as the originator when using the data set as a source. User must share data products developed using this source data set with the U.S. Fish and Wildlife Service. Data should not be used beyond the limits of the source scale. The data set is NOT a survey document and should not be utilized as such. The data set is NOT to be used for definitive in/out determinations. USFWS Data Disclaimer Coastal Barrier Resources System (CBRS) digital boundaries in this mapper 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 150 feet of the actual CBRS boundaries as shown on the official maps. 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 in this mapper. 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. For information on the horizontal accuracy of this digital data set, please read the metadata. USFWS Use Constraints *User must read and fully comprehend the metadata prior to data use. *User must acknowledge the U.S. Fish and Wildlife Service as the originator when using the data set as a source. *User must share data products developed using this source data set with the U.S. Fish and Wildlife Service. *Data should not be used beyond the limits of the source scale. *The data set is NOT a survey document and should not be utilized as such. *The data set is NOT to be used for definitive in/out determinations. Last updated: July 10, 2017 SOURCE: https://www.fws.gov/cbra/maps/Data-Disclaimer-Mapper.html

In most cases the seaward boundary of a CBRS unit is defined by the 30 foot bathymetric contour rather than a hard boundary depicted on the official source map. In these cases, the digital boundaries have been terminated by connecting the ends of the lateral boundaries on the seaward side. Therefore, the actual CBRS seaward boundary may extend farther offshore than is shown by the polygons. In large coastal embayments and the Great Lakes, the boundary is defined by the 20-ft bathymetric contour or a line approximately one mile seaward of the shoreline, whichever is nearer the coastal barrier.

Because many CBRS boundaries have specific relationships to features visible on the base map, the CBRS boundaries are most reliable when paired with the orthoimagery that was used in the boundary digitization. Therefore, a potential source of error is the spatial accuracy of the base map orthoimagery. The CBRS boundaries inherit the spatial accuracy of base orthoimagery, and may appear not to fit other images properly. The orthoimagery is obtained from multiple sources and is selected based on quality, cost, and coverage availability. The imagery selected generally met the following guidelines: it must be no more than five years old at the time of boundary digitization, it must have a resolution of 1 meter pixels or less, the imagery must be orthorectified, and the imagery must be available free of charge. Commonly used orthoimagery for CBRS mapping is from the National Agriculture Imagery Program (NAIP). NAIP imagery has a stated horizontal accuracy of +/- 20 feet. For official CBRS maps produced since 2014, the base map image source is printed in the title block of the map. To obtain the source of the base map image for a particular map or for other information about CBRS mapping, please email CBRA@fws.gov.

The GeoPlan Center downloaded the Coastal Barrier Resources System (CBRS) polygon dataset on August 9th, 2018 from the following USFWS webpage. https://www.fws.gov/cbra/maps/Boundaries.html https://www.fws.gov/cbra/maps/CBRS_Polygons.zip CBRS_Polygons.zip CBRS_Polygons.shp When downloaded the data was in Geographic Coordinate System North_American_1983 The dataset was reprojected to the following FGDL Albers projection: Albers Conical Equal Area [Florida Geographic Data Library] -Selected only polygons that intersected the Florida County Boundaries -Changed name from CBRS_Polygons.shp to cbrs_mar18.shp -Added DESCRIPT field based on NAME and UNIT. -Added FGDLAQDATE based on date acquired from source -Upcased all records

The approximate amount of fastlands (also known as uplands), in acres, that is landward of the shoreline of a unit. Land of this type is considered to generally consist of land above mean high tide. The value is derived by calculating the portion of the unit, inland of the shoreline, that is not covered by the National Wetlands Inventory (NWI) polygons.

The approximate amount of wetlands and open water landward of the shoreline of a unit, in acres. This value is most often derived by calculating the portion of the unit, landward of the shoreline, that contains NWI polygons. The associated aquatic habitat acreage numbers include open water landward of the coastal barrier, but not nearshore waters seaward of the shoreline. For the purpose of the acreage calculation, all units were artificially closed at the seaward shoreline using a dataset digitized for this purpose before acreage calculations were performed.

The approximate length of shoreline within a unit in miles. The Service digitized a shoreline boundary to artificially close off the units along the seaward shoreline. This shoreline boundary generally follows the wet/dry sand line as interpreted from the base map image. Additionally, the shoreline boundary crosses any inlets and/or other dividing water bodies within each unit. In conjunction with the boundaries of the unit, the shoreline boundary is used to define the total area of a unit that is subject to an acreage calculation.

CBRS Units: The Coastal Barrier Resources Act (CBRA), as amended, established the John H. Chafee Coastal Barrier Resources System (CBRS), a defined set of geographic units along the Atlantic, Gulf of Mexico, Great Lakes, U.S. Virgin Islands, and Puerto Rico coasts. Most new Federal expenditures and financial assistance are prohibited within the CBRS, unless those activities qualify for an exception under Section 6 of CBRA (16 U.S.C. 3505). The U.S. Fish and Wildlife Service (Service), through the Secretary of the Interior, is responsible for administering CBRA which includes consulting with Federal agencies that propose spending funds within the CBRS. There are two types of units within the CBRS; "System units" and "Otherwise Protected Areas" (OPAs). The boundaries of System units are generally intended to follow geomorphic, development, or cultural features (e.g., wetland/upland interface, roads, etc.) and are depicted on the CBRS maps with bold solid lines. Most new Federal expenditures and financial assistance, including Federal flood insurance, are prohibited within System units. The CBRS currently includes 585 System units, which add up to approximately 1.35 million acres of land and associated aquatic habitat. The boundaries of OPAs are generally intended to coincide with the boundaries of conservation or recreation areas such as state parks and national wildlife refuges. OPAs are depicted on the CBRS maps with dotted/dashed lines and unit names followed by a "P" (e.g., FL-20P). The only Federal spending prohibition within OPAs is the prohibition on Federal flood insurance. The CBRS currently includes 277 OPAs which add up to approximately 2.11 million acres of land and associated aquatic habitat.

The entity and attribute information was generated by the individual and/or agency identified as the originator of the data set. Please review the rest of the metadata record for additional details and information.

The Florida Geographic Data Library is a collection of Geospatial Data compiled by the University of Florida GeoPlan Center with support from the Florida Department of Transportation. GIS data available in FGDL is collected from various state, federal, and other agencies (data sources) who are data stewards, producers, or publishers. The data available in FGDL may not be the most current version of the data offered by the data source. University of Florida GeoPlan Center makes no guarantees about the currentness of the data and suggests that data users check with the data source to see if more recent versions of the data exist. Furthermore, the GIS data available in the FGDL are provided 'as is'. The University of Florida GeoPlan Center makes no warranties, guaranties or representations as to the truth, accuracy or completeness of the data provided by the data sources. The University of Florida GeoPlan Center makes no representations or warranties about the quality or suitability of the materials, either expressly or implied, including but not limited to any implied warranties of merchantability, fitness for a particular purpose, or non-infringement. The University of Florida GeoPlan Center shall not be liable for any damages suffered as a result of using, modifying, contributing or distributing the materials. A note about data scale: Scale is an important factor in data usage. Certain scale datasets are not suitable for some project, analysis, or modeling purposes. Please be sure you are using the best available data. 1:24000 scale datasets are recommended for projects that are at the county level. 1:24000 data should NOT be used for high accuracy base mapping such as property parcel boundaries. 1:100000 scale datasets are recommended for projects that are at the multi-county or regional level. 1:125000 scale datasets are recommended for projects that are at the regional or state level or larger. Vector datasets with no defined scale or accuracy should be considered suspect. Make sure you are familiar with your data before using it for projects or analysis. Every effort has been made to supply the user with data documentation. For additional information, see the References section and the Data Source Contact section of this documentation. For more information regarding scale and accuracy, see our webpage at: http://geoplan.ufl.edu/education.html

JOHN H. CHAFEE COASTAL BARRIER RESOURCES SYSTEM (CBRS) APPROXIMATE POLYGONS FOR FLORIDA - MARCH 2018

Metadata: