FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION

TITLE: JOHN H. CHAFEE COASTAL BARRIER RESOURCES SYSTEM (CBRS) APPROXIAMTE POLYGONS FOR FLORIDA

Geodataset Name:       CBRS_DEC14
Geodataset Type:       SDE Feature Class
Geodataset Feature:    Polygon
Feature Count:         133
GENERAL DESCRIPTION:
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 4/1/2007 and 12/18/2014 from the official John H. Chafee Coastal Barrier Resources System CBRS maps. The majority of the boundaries were digitized from the official paper maps. In cases where the official map was created through digital methods, the digital boundary was used. As maps are revised this data set will be updated with the new boundaries. This data set contains CBRS polygons that have varying levels of horizontal accuracy depending on the methods used for digitization of the boundaries, and the age and quality of the official CBRS map. The different levels of horizontal accuracy are described below in the horizontal accuracy statement. 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. Copies of the official CBRS maps are available for viewing at Service's Headquarters office and are also available to view or download at http://www.fws.gov/cbra/maps. 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 150 feet of TIER 1 and 20 feet of TIER 2) 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 http://www.fws.gov/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 layer CBRS_NOV12.
DATA SOURCE(S):                    U.S. Fish and Wildlife Service
SCALE OF ORIGINAL SOURCE MAPS:     24000
GEODATASET EXTENT:                 State of Florida
PUBLICATION DATE: 20141218 TIME PERIOD OF CONTENT: Begin Date: 19901024 End Date: 20141218 DOWNLOAD LINK: http://www.fgdl.org/metadataexplorer/explorer.jsp

FEATURE ATTRIBUTE TABLES:

Datafile Name: CBRS_DEC14.DBF
ITEM NAME WIDTH TYPE
OBJECTID
4 OID
Shape
4 Geometry
UNIT
8 String
NAME
254 String
UNIT_TYPE
25 String
TIER
2 SmallInteger
FAST_ACRES
8 Double
WET_ACRES
8 Double
SHORE_MILE
8 Double
DESCRIPT
30 String
FGDLAQDATE
36 Date
AUTOID
4 Integer
SHAPE.AREA
0 Double
SHAPE.LEN
0 Double

FEATURE ATTRIBUTE TABLES CODES AND VALUES:

Item
Item Description
OBJECTID Internal feature number.

Shape Feature geometry.

UNIT Unique identifier for each individual CBRS UNIT.

NAME The NAME of the UNIT.

UNIT_TYPE CBRS units are one of two types: System Units and Otherwise Protected Areas.
Otherwise Protected Area = The only Federal spending prohibition within OPAs is the prohibition on Federal flood insurance.

System Unit = Most new Federal expenditures and financial assistance, including Federal flood insurance, are prohibited within System units.


TIER The polygons in this data set have two TIERs of horizontal accuracy depending on the methods used for digitization of the boundary lines, and the age and quality of the official CBRS map. TIER 1 polygons are of lower quality and accuracy than TIER 2 polygons. See the Horizontal Accuracy Statement for more information.

FAST_ACRES 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.

WET_ACRES The approximate amount of wetlands and open water landward of the shoreline of a UNIT, in acres. This value is found derived by calculating the portion of the UNIT, landward of the shoreline, that contains NWI polygons. Note: the nearshore waters of a UNIT are not included in the wetlands acreage calculation.

SHORE_MILE The approximate length of shoreline within a UNIT in miles. The shoreline generally follows the wet/dry sand line as interpreted from the base map image. Additionally, the shoreline crosses any inlets and/or other dividing water bodies within each UNIT. In conjunction with the boundaries of the UNIT, the shoreline is also used to define the total area of a UNIT that is subject to an acreage calculation.

DESCRIPT GeoPlan added field based on UNIT_TYPE.

FGDLAQDATE Date GeoPlan acquired the data from Source.

AUTOID Unique ID added by GeoPlan

SHAPE.AREA Area in meters

SHAPE.LEN Perimeter in meters

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 1.3 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 272 OPAs which add up to 
approximately 1.9 million acres of land and associated aquatic habitat.
USER NOTES:
USFWS:
Topological checks were conducted to ensure that no polygons overlap and that 
adjacent boundaries are coincident where appropriate.
USFWS:
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.
USFWS:
Independent quality control checks were conducted on all attributes.

GeoPlan relied on the integrity of the attribute information within
the original data.
What is the Coastal Barrier Resources Act?

In the 1970s and 1980s, Congress recognized that certain actions and programs of 
the Federal Government have historically subsidized and encouraged development 
on coastal barriers, resulting in the loss of natural resources; threats to human life, 
health, and property; and the expenditure of millions of tax dollars each year.  To 
remove the Federal incentive to develop these areas, Congress passed the Coastal 
Barrier Resources Act (CBRA) of 1982 which designated relatively undeveloped 
coastal barriers along the Atlantic and Gulf coasts as part of the John H. Chafee 
Coastal Barrier Resources System (CBRS), and made these areas ineligible for most
new Federal expenditures and financial assistance.


 What is the John H. Chafee Coastal Barrier Resources System?

The Coastal Barrier Resources Act (CBRA) established the John H. Chafee Coastal 
Barrier Resources System (CBRS) in 1982. The CBRS consists of the undeveloped 
coastal barriers and other areas located on the coasts of the United States that are 
identified and generally depicted on a series of maps entitled 'John H. Chafee 
Coastal Barrier Resources System.' These maps are controlling and dictate which 
lands are affected by the CBRA.


What are Coastal Barrier Landforms?

Coastal barriers are unique landforms that provide protection for diverse aquatic 
habitats and serve as the mainland's first line of defense against the impacts of 
severe coastal storms and erosion. Located at the interface of land and sea, the 
dominant physical factors responsible for shaping coastal landforms are tidal range, 
wave energy, and sediment supply from rivers and older, pre-existing coastal sand 
bodies.

SOURCE: http://www.fws.gov/cbra/

This data set was created to provide local users with a general depiction of the 
aerial extent of the boundaries of the John H. Chafee Coastal Barrier Resources 
System.

USFWS:
The CBRS polygons in this data set have two TIERs of horizontal accuracy 
depending on the methods used for digitization of the boundaries, and the age and 
quality of the official CBRS map.  TIER 1 polygons are of lower quality and 
accuracy than TIER 2 polygons.  As the Service modernizes the CBRS maps, TIER
1 polygons will be upgraded to TIER 2.  TIER 1:  Centerline Boundaries:  Polygons 
attributed with a TIER 1 accuracy level were created by digitizing the center of the 
CBRS boundaries shown on the official paper maps (mostly published in 1990).  
The potential sources of error are described below. Base map accuracy:  
Most of the official CBRS maps use United States Geological Survey (USGS) 
Quadrangles (quads) as a base map.  USGS quads are tested to meet the National 
Map Accuracy Standards, and have a declared horizontal accuracy of at least 90% 
at the ?well-defined points? tested, with an error of approximately plus or minus 40 feet.  
However, the majority of the boundaries used to create the TIER 1 polygons follow 
several categories of features shown on the quads (such as vegetative breaks, 
shorelines, and mangrove stands) that cannot be considered to be 'well-defined points,' 
and therefore may have a greater degree of horizontal error than is stated above.  
As such, the CBRS boundaries on the official maps will have inherited the level of error 
in horizontal accuracy of the quads. Georeferencing accuracy:  Additional error may have 
been introduced during the georeferencing process.  Generally, the paper CBRS maps 
were scanned and then georeferenced to a USGS or third party Digital Raster 
Graphic (DRG) of the quad covering the same area as the CBRS map.  
Therefore, any horizontal error in the DRG can be assumed to have been inherited during 
the georeferencing process.  The Service makes no claim to the accuracy of third party 
data used in this process.  Furthermore, new error could have been introduced during the 
georeferencing process as a result of inexact or insufficient control point selection.  
However, all georeferenced maps were visually inspected for adequate fit to the DRG and 
aerial imagery along the boundary.   Digitization of the boundary:  Every attempt was made 
to digitize the exact center of the boundaries on the official CBRS maps.  
However, because the boundary lines on these maps vary in width between 80 and 100 feet 
on the ground and the boundaries appear pixilated at the scale used in the digitization process, 
it was difficult to consistently define the centerline of the CBRS boundaries.  
Therefore, additional error was introduced as a result of this process. Gaps in boundaries:  
The official CBRS maps occasionally have gaps in the boundary where no line was drawn 
to avoid obscuring a feature label on the quad.  In these places, cartographic judgment was 
used and the boundary was digitized generally to follow the feature that the boundary was 
following on the DRG, or drawn as a straight line if the boundary intent was not clear. 
Edge matching:  Many CBRS UNITs extend across multiple maps.  In some cases there are 
significant disjunctions between the boundaries at the edges of adjacent maps because of the 
manual process that was used to draw the CBRS boundaries.  Cartographic judgment was used 
to determine the best way to eliminate these disjunctions on a case by case basis.  Additionally, 
many of the official CBRS maps were created by physically cutting paper quads and taping them 
together (splicing) to achieve the desired map extent prior to drawing the boundaries.  
In almost every case there was some error introduced by imperfect edge matching.  
Poor splices on the official CBRS maps were accounted for by georeferencing the maps multiple 
times.  For example, in cases where the official CBRS map was composed of two different quads 
taped together vertically down the middle, the western half of the map would be georeferenced 
and digitized separately from the eastern half.  This typically resulted in a disjunction where the 
CBRS boundary on either side of the splice comes together.  In these cases, cartographic 
judgment was used to determine the best way to eliminate disjunctions.  
TIER 2:  Digital Conversion and Comprehensively Modernized Boundaries: 
The Service has two ongoing map modernization projects:  (1) digital conversion, which produces 
modernized maps that have very limited changes and can be adopted administratively (changes 
limited to those authorized under 16 U.S.C. 3503(c)-(e)); and (2) comprehensive map modernization, 
which produces comprehensively revised maps that contain more significant changes and must 
be enacted by Congress to become effective (mandated by Sections 3 and 4 of P.L. 109-226).  
For more information about CBRA mapping, visit http://www.fws.gov/cbra. 
Polygons attributed with a TIER 2 accuracy level were created with modern Geographic Information 
Systems (GIS) technology using orthorectified aerial imagery (orthoimagery) as the base map.  
Because CBRS boundaries are often tied to features visible on the base map, the CBRS boundaries 
with TIER 2 accuracy are most reliable when paired with the base image that they were digitized on 
and are much higher quality than TIER 1 boundaries.  To obtain the source of the base map image 
for a particular map, please email CBRA@fws.gov.  Since 1999, TIER 2 boundaries have been 
used to create paper maps that were either enacted into law by Congress or administratively 
adopted by the Secretary.  A potential source of error is described below. Spatial accuracy of 
orthoimagery:  The orthoimagery is obtained from multiple sources and is selected based on quality, 
cost, and coverage availability.  The imagery selected for use in this process 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 TIER 2 boundaries 
is from the National Agriculture Imagery Program (NAIP).  NAIP imagery has an accuracy of 
+/- 20 feet.  Many CBRS boundaries are drawn to have specific relationships to features shown 
on the orthoimage that they were digitized on.  Therefore, the CBRS boundaries inherit the spatial 
accuracy of base orthoimagery, and may appear not to fit other images properly.

USFWS:
A formal accuracy assessment of the vertical positional information in the data set 
has either not been conducted, or is not applicable.

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.

USFWS Data Disclaimer

Coastal Barrier Resources System (CBRS) polygons in this data set 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.  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: http://www.fws.gov/cbra/Determinations.html.  
For information on project consultations, 
please visit: http://www.fws.gov/CBRA/Consultations/Consultations.html. 
For information on the horizontal accuracy of this digital data set, please read the metadata.

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

REFERENCES:
Coastal Barrier Resources Act
http://www.fws.gov/cbra/

Digital CBRS Boundaries
http://www.fws.gov/cbra/Maps/Boundaries.html
http://www.fws.gov/cbra/Maps/Data_Disclaimer_Shapefiles.html

DATA LINEAGE SUMMARY:
Development of the data set by the agency / individuals identified in the 'Originator' 
element in the Identification Info section of the record.

Congress Makes Updates to Coastal Barrier Resources System Maps in Four States

Maps depicting 11 units of the Coastal Barrier Resources System (CBRS) were 
made effective on December 18, 2014, via Public Law 113-253. The new maps 
(depicting revisions to ten units and one entirely new unit) are accessible via a U.S.
Fish and Wildlife Service (Service) online mapper. The affected units, comprising 
19,893 total acres, are located in Rhode Island, North Carolina, South Carolina, and
Florida. The new maps correct errors affecting property owners and add eligible 
undeveloped areas to the CBRS.

Florida Maps
A new map for CBRS Units FL-70 and FL-70P, located in Lee County, Florida, was 
made effective on December 18, 2014, via Public Law 113-253.
http://www.fws.gov/cbra/Maps/Recently-Enacted-Maps.html
Process Date: 20141218

This data set was downloaded by GeoPlan from the following USFWS webpage: http://www.fws.gov/cbra/Maps/Boundaries.html http://www.fws.gov/cbra/Maps/Data_Disclaimer_Shapefiles.html CBRS_Polygons.zip CBRS_Polygons.shp The data was downloaded in shapefile format on February 20th, 2015. 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_dec14.shp -Added DESCRIPT field based on UNIT_TYPE -Added FGDLAQDATE based on date acquired from source -Upcased all records Process Date: 20150220
MAP PROJECTION PARAMETERS:

Projection                          ALBERS
Datum                               HPGN
Units                               METERS
Spheroid                            GRS1980
1st Standard Parallel               24  0  0.000
2nd Standard Parallel               31 30  0.000
Central Meridian                   -84 00  0.000
Latitude of Projection's Origin     24  0  0.000
False Easting (meters)              400000.00000
False Northing (meters)             0.00000

DATA SOURCE CONTACT (S):

Name:
Abbr. Name:
Address:


Phone:

Web site:
E-mail:
Contact Person:
         Phone:
        E-mail:
U.S. Fish and Wildlife Service
USFWS
U.S. Fish and Wildlife Service Headquarters, 5275 Leesburg Pike, MS ES
Falls Church, Virginia
22041
703-358-2171

http://www.fws.gov/cbra/Maps/Data_Disclaimer_Shapefiles.html CBRA@fws.gov Katie Niemi

FGDL CONTACT:
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Abbr. Name:             FGDL
Address:                Florida Geographic Data Library
                        431 Architecture Building
                        PO Box 115706
                        Gainesville, FL  32611-5706
Web site:               http://www.fgdl.org

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