FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION
TITLE: COASTAL EMERGENCY MANAGEMENT FLOOD DATA
Geodataset Name: CEMMGT Geodataset Type: Shape Geodataset Feature: Polygon
GENERAL DESCRIPTION
This dataset is a subset of the Federal Emergency Management Agency Flood Maps FEMA96. It contains data regarding coastal flooding, such as Velocity Zones, COBRA areas, and Floodways.
DATA SOURCE(s): FEDERAL EMERGENCY MANAGEMENT AGENCY SCALE OF ORIGINAL SOURCE MAPS: 1:24000 DATE OF AUTOMATION OR SOURCE: Source 1990, Automated 1996
GEODATASET EXTENT: State of Florida; with the
exception of the following
counties:
BRADFORD, COLUMBIA,
DIXIE, GILCHRIST,
HAMILTON, JEFFERSON,
LAFAYETTE,MADISON,
OKEECHOBEE, TAYLOR,
UNION.
FEATURE ATTRIBUTE TABLES
Datafile Name: CEMMGT.DBF
ITEM NAME WIDTH TYPE PRECISION SHAPE 8 Shapepoly - AREA 19 Decimal 3 PERIMETER 19 Decimal 3 FIPS 5 Character - COMMUNITY 4 Character - FIRM_PANEL 11 Character - QUAD 8 Character - ZONE 5 Character - FLOODWAY 5 Character - COBRA 9 Character - SFHA 3 Character - SYMBOL 9 Decimal 0 PANEL_TYP 4 Character - DESCRIPT 50 Character -
FEATURE ATTRIBUTE TABLES CODES AND VALUES
Item Item description
SHAPE Data attribute inherent to the ESRI shapefile format,
which defines the data as a point, polyline, or polygon.
AREA Area of the polygon in square meters
PERIMETER Perimeter of the polygons in meters
FIPS Standard 5-digit State and County FIPS codes.
Definition source is from Federal Information
Processing Standard (FIPS), National Institute of
Standards & Technology (NIST); first 2 digits for state,
last 3 digits for county.
COMMUNITY Identifies a county, city, or other community
responsible for flood plain management. Numeric value
assigned by FEMA,(0..9999).
FIRM_PANEL Eleven-digit alpha-numeric code identifies portion of
community covered or not covered by a FIRM panel. Code
comprises a unique alpha-numeric sequence based on FIPS
and FEMA Community and Panel identification.
QUAD USGS 7.5-minute quadrangle identifier.
ZONE Flood hazard zone designation. Multiple Codes refer to
"Q3 Flood Data Specifications"
VALUES DESCRIPTION
V An area inundated by 100-year flooding with
velocity hazard (wave action); no Base Flood
Elevation (BFEs) have been determined.
VE An area inundated by 100-year flooding with
velocity hazard (wave action); BFEs have been
determined.
A An area inundated by 100-year flooding, for
which no BFEs have been determined.
AE An area inundated by 100-year flooding, for
which BFEs have been determined.
AO An area inundated by 100-year flooding (usually
sheet flow on sloping terrain), for which
average depths have been determined; flood
depths range from 1 to 3 feet.
AOVEL An alluvial fan inundated by 100-year flooding
(usually sheet flow on sloping terrain), for
which average flood depths and velocities have
been determined; flood depths range from 1 to 3
feet.
AH An area inundated by 100-year flooding (usually
an area of ponding), for which BFEs have been
determined; flood depths range from 1 to 3 feet.
A99 An area inundated by 100-year flooding, for
which no BFEs have been determined. This is an
area to be protected from the 100-year flood by
a Federal flood protection system under
construction.
D An area of undetermined but possible flood
hazards.
AR An area inundated by flooding, for which BFEs or
average depths have been determined. This is an
area that was previously, and will again, be
protected from the 100-year flood by a Federal
flood protection system whose restoration is
Federally funded and underway.
X500 An area inundated by 500-year flooding; an area
inundated by 100-year flooding with average
depths of less than 1 foot or with drainage
areas less than 1 square mile; or an area
protected by levees from the 100-year flooding.
X An area that is determined to be outside the
100- and 500-year floodplains.
100IC An area where the 100-year flooding is contained
within the channel banks and the channel is too
narrow to show to scale. An arbitrary channel
width of 3 meters is shown. BFEs are not shown
in this area, although they may be reflected on
the corresponding profile.
500IC An area where the 500-year flooding is contained
within the channel banks and the channel is too
narrow to show to scale. An arbitrary channel
width of 3 meters is shown.
FWIC An area where the floodway is contained within
the channel banks and the channel is too narrow
to show to scale. An arbitrary channel width of
3 meters is shown. BFEs are not shown in this
area, although they may be reflected on the
corresponding profile.
FPQ An area designated as a "Flood Prone Area" on a
map prepared by USGS and the Federal Insurance
Administration. This area has been delineated
based on available information on past floods.
This is an area inundated by 100-year flooding
for which no BFEs have been determined.
FLOODWAY Channel, river or watercourse reserved for flood
discharge. Multiple Codes refer to "Q3 Flood Data
Specifications".
COBRA Undeveloped Coastal Barrier Area. Multiple Codes refer
to "Q3 Flood Data Specifications".
SFHA In/Out of flood zone designation, determined from data
topology.
VALUES DESCRIPTION
IN An area designated as within a "Special Flood
Hazard Area" (or SFHA) on a FIRM. This is an
area inundated by 100-year flooding for which no
BFEs or velocity may have been determined. No
distinctions are made between the different
flood hazard zones that may be included within
the SFHA. These may include Zones A, AE, AO,
AH, A99, AR, V, or VE.
OUT An area designated as outside a "Special Flood
Hazard Area" (or SFHA) on a FIRM. This is an
area inundated by 500-year flooding; an area
inundated by 100-year flooding with average
depths of less than 1 foot or with drainage
areas less than 1 square mile; an area
protected by levees from 100-year flooding; or
an area that is determined to be outside the
100- and 500-year floodplains. No distinctions
are made between these different conditions.
These may include both shaded and unshaded areas
of Zone X.
ANI An area that is located within a community or
county that is not mapped on any published FIRM.
UNDES A body of open water, such as a pond, lake
ocean, etc., located within a community's
jurisdictional limits, that has no defined flood
hazard.
SYMBOL Polygon shade symbols for graphic output, based on
polygon codes. Multiple Codes refer to "Q3 Flood Data
Specifications"
PANEL_TYP Type of FIRM panel represented.
Multiple Codes refer to "Q3 Flood Data Specifications".
DESCRIPT FGDL added item based on SFHA
USER NOTES:
This layer is a subset of the FEMA96 layer. It represents coastal flooding areas in a statewide extent. The larger FEMA96 layer contains the entire state flood information and is available on the FGDL Core CDROM series by county.
Data is missing for several counties in Florida. The database will be updated when the data becomes available.
These data are designed to provide a guidance and a
general proximity of the locations of Special Flood Hazard Areas(SFHA)
and zones of possible risks associated with food inundation. In
addition to locational and topological information, features contained
in the data set include 1%(100 year) and 0.2% (500 year) annual chance
flood plain boundaries, flood insurance zone designations (including
Velocity zones), flood way boundaries(when available), political
boundaries(State, county and community), community and map panel
identification number, FIRM panel neat lines, USGS 7.5-minute
(1:24,000 scale) topographic map quadrangle neat lines, and Coastal
Barrier Resource Act(COBRA) areas.
The digital Q3 Flood Data are designed so serve FEMA's needs for disaster response activities, National Flood Insurance Program activities, risk assessment, and flood plain management. The data are expected to be used for a variety of planning applications including broad-based reviews for flood plain management, land-use planning, commercial siting analysis, insurance target marketing, natural resource/environmental analysis, and real estate development and targeting.
Caution: The digital Q3 Flood Data product was not designed to make strict in/out flood risk determinations. The data are designed to provide guidance and a general proximity of the location of applications such as detailed site design and development plans or flood risk determinations. The digital Q3 Flood Data cannot be used to determine absolute delineations of flood boundaries, but instead should be seen as portraying zones of uncertainty and possible risks associated with flood inundation. Users must apply considerable care and judgment in applying this product. Users should refer to the "Users Guide" and "Specifications" for further information.
FGDL QUALITY ASSURANCE STATUS:
-Reprojected data to FGDL Albers
-Set Precision to DOUBLE
-Set Tolerances to FGDL Standards
-Added DESCRIPT item based on Special Flood Hazard Area
REFERENCES:
For more information consult:
DATA LINEAGE SUMMARY:
This data set also known as Q3 Flood Data was produced by either scanning and vectoring or manually digitizing a hard copy version of the graphic materials, and attribution was performed along with or after that process.
MAP PROJECTION PARAMETERS
Projection ALBERS Units METERS Datum HPGN Spheroid GRS 1980 1st standard parallel 24 0 0.000 2nd standard parallel 31 30 0.000 central meridian -84 0 0.000 latitude of projection's origin 24 0 0.000 false easting (meters) 400000.00000 false northing (meters) 0.00000
DATA SOURCES CONTACT(S):
Name: FEDERAL EMERGENCY MANAGEMENT AGENCY
Abbr. Name: FEMA
Address: Federal Emergency Management Agency, Mitigation
Directorate
Q3 Flood Data Program
500 C Street, S.W.
Washington, D.C. 20472
Phone: 1-800-358-9691 (inquiries and ordering)
(617) 354-2614 (technical questions)
Web site: http://www.fema.gov
Contact Person: Operator will direct you
Phone 1-800-358-9691
FGDL CONTACT:
Name: Florida Geographic Data Library
Abbr. Name: FGDL
Address: Florida Geographic Data Library
431 Architecture Building
PO Box 115706
Gainesville, FL 32611-5706
Web site: http://www.fgdl.org
Contact FGDL:
Technical Support: http://www.fgdl.org/fgdlfeed.html
FGDL Frequently Asked Questions: http://www.fgdl.org/fgdlfaq.html
FGDL Mailing Lists: http://www.fgdl.org/fgdl-l.html
For FGDL Software: http://www.fgdl.org/software.html