Geodataset Name:       DFIRM_FLDHAZ_FEB09
Geodataset Type:       SHAPEFILE
Geodataset Feature:    Polygon
Feature Count:         52177

DATA SOURCE(S):                    Federal Emergency Management Agency
SCALE OF ORIGINAL SOURCE MAPS:     12000
GEODATASET EXTENT:                 Alachua County, Baker County, Bay County, Charlotte County, 
Columbia County, Dixie County, Escambia County, Flagler County, Gadsden County, Gilchrist County, 
Gulf County, Hillsborough County, Lafayette County, Lake County, Lee County, Leon County, 
Marion County, Monroe County, Okaloosa County, Osceola County, Pinellas County, Santa Rosa County, 
Seminole County, St. Johns County, Suwannee County, Union County, Volusia County.

PUBLICATION DATE:                  20090204
TIME PERIOD OF CONTENT:            Begin Date: 20010606    End Date: 20090204
DOWNLOAD LINK:                     http://www.fgdl.org/metadataexplorer/explorer.jsp

FEATURE ATTRIBUTE TABLES:

Datafile Name: DFIRM_FLDHAZ_FEB09.DBF

FEATURE ATTRIBUTE TABLES CODES AND VALUES:

Item	Item Description
OBJECTID	Internal feature number.
FLD_AR_ID	Primary key for table lookup. Assigned by table creator.
FLD_ZONE	Flood Zone. This is a flood zone designation. These zones are used by FEMA to designate the SFHAs and for insurance rating purposes. NOTE: The symbol '%' is a reserved symbol in most software packages so the word 'percent' was abbreviated to 'PCT'. Acceptable values for this field are listed in the D_Zone table. A = Zone A is the flood insurance rate zone that corresponds to the 1-percent annual chance floodplains that are determined in the Flood Insurance Study by approximate methods of analysis. Because detailed hydraulic analyses are not performed for such areas, no Base Flood Elevations or depths are shown within this zone. Mandatory flood insurance purchase requirements apply. AE and A1-A30 = Zones AE and A1-A30 are the flood insurance rate zones that correspond to the 1-percent annual chance floodplains that are determined in the Flood Insurance Study by detailed methods of analysis. In most instances, Base Flood Elevations derived from the detailed hydraulic analyses are shown at selected intervals within this zone. Mandatory flood insurance purchase requirements apply. AH = Zone AH is the flood insurance rate zone that corresponds to the areas of 1-percent annual chance shallow flooding with a constant water-surface elevation (usually areas of ponding) where average depths are between 1 and 3 feet. The Base Flood Elevations derived from the detailed hydraulic analyses are shown at selected intervals within this zone. Mandatory flood insurance purchase requirements apply. AO = Zone AO is the flood insurance rate zone that corresponds to the areas of 1-percent shallow flooding (usually sheet flow on sloping terrain) where average depths are between 1 and 3 feet. Average flood depths derived from the detailed hydraulic analyses are shown within this zone. In addition, alluvial fan flood hazards are shown as Zone AO on the Flood Insurance Rate Map. Mandatory flood insurance purchase requirements apply. AR = Zone AR is the flood insurance rate zone used to depict areas protected from flood hazards by flood control structures, such as a levee, that are being restored. FEMA will consider using the Zone AR designation for a community if the flood protection system has been deemed restorable by a Federal agency in consultation with a local project sponsor; a minimum level of flood protection is still provided to the community by the system; and restoration of the flood protection system is scheduled to begin within a designated time period and in accordance with a progress plan negotiated between the community and FEMA. Mandatory purchase requirements for flood insurance will apply in Zone AR, but the rate will not exceed the rate for an unnumbered Zone A if the structure is built in compliance with Zone AR floodplain management regulations. A99 = Zone A99 is the flood insurance rate zone that corresponds to areas within the 1-percent annual chance floodplain that will be protected by a Federal flood protection system where construction has reached specified statutory milestones. No Base Flood Elevations or depths are shown within this zone. Mandatory flood insurance purchase requirements apply. D = The Zone D designation is used for areas where there are possible but undetermined flood hazards. In areas designated as Zone D, no analysis of flood hazards has been conducted. Mandatory flood insurance purchase requirements do not apply, but coverage is available. The flood insurance rates for properties in Zone D are commensurate with the uncertainty of the flood risk. V = Zone V is the flood insurance rate zone that corresponds to areas within the 1-percent annual chance coastal floodplains that have additional hazards associated with storm waves. Because approximate hydraulic analyses are performed for such areas, no Base Flood Elevations are shown within this zone. Mandatory flood insurance purchase requirements apply. VE = Zone VE is the flood insurance rate zone that corresponds to areas within the 1-percent annual chance coastal floodplain that have additional hazards associated with storm waves. Base Flood Elevations derived from the detailed hydraulic analyses are shown at selected intervals within this zone. Mandatory flood insurance purchase requirements apply. B, C, and X = Zones B, C, and X are the flood insurance rate zones that correspond to areas outside the 1-percent annual chance floodplain, areas of 1-percent annual chance sheet flow flooding where average depths are less than 1 foot, areas of 1-percent annual chance stream flooding where the contributing drainage area is less than 1 square mile, or areas protected from the 1-percent annual chance flood by levees. No Base Flood Elevations or depths are shown within this zone. Insurance purchase is not required in these zones. 0.2 PCT ANNUAL CHANCE FLOOD HAZARD = Areas with a 0.2% annual chance of flooding (500 year).
FLOODWAY	Floodway Type. Floodway areas are designated by FEMA and adopted by communities to provide an area that will remain free of development to moderate increases in flood heights due to encroachment on the floodplain. Normal floodway areas are 'floodway'. Special cases will have a note on the hardcopy FIRM. If the corresponding area is not designated as a floodway, this field is null. Acceptable values for this field are listed in the D_Floodway table.
SFHA_TF	Special Flood Hazard Area. If the area is within SFHA this field would be True. This field will be true for any area that is coded for any A or V zone flood areas. It should be false for any X or D zone flood areas. Enter "T" for true or "F" for false.
STATIC_BFE	Static Base Flood Elevation. For areas of constant Base Flood Elevation (BFE), the BFE value is shown beneath the zone label rather than on a BFE line. In this situation the same BFE applies to the entire polygon. This is normally occurs in lakes or coastal zones. This field is only populated where a static BFE is shown on the FIRM.
V_DATUM	Vertical Datum. The vertical datum indicates the reference surface from which the flood elevations are measured. Normally this would be North American Vertical Datum of 1988 for new studies. This field is only populated if the STATIC_BFE field is populated. Acceptable values for this field are listed in the D_V_Datum table.
DEPTH	Depth Value for Zone AO Areas. This is shown beneath the zone label on the FIRM. This field is only populated if a depth is shown on the FIRM.
LEN_UNIT	Length Units. This unit indicates the measurement system used for the BFEs and/or depths. Normally this would be feet. This field is only populated if the STATIC_BFE or DEPTH field is populated. Acceptable values for this field are listed in the D_Length_Units table.
VELOCITY	Velocity Measurement. This is shown beneath the zone label on the FIRM for alluvial fan areas (certain Zone AO areas). This value represents the velocity of the flood flow in this area. This field is only populated when a velocity is shown on the FIRM.
VEL_UNIT	Unit of Measurement for the Velocity Attribute. This is shown in the legend where alluvial fans are present. This field is only populated if the VELOCITY field is populated. Acceptable values for this field are listed in the D_Velocity_Units table.
AR_REVERT	If the area is Zone AR, this field would hold the zone that the area would revert to if the AR zone were removed. This field is only populated if the corresponding area is Zone AR. Acceptable values for this field are listed in the D_Zone table.
BFE_REVERT	If Zone is Zone AR, this field would hold the static base flood elevation for the reverted zone. This field is populated when Zone equals AR and the reverted zone has a static BFE.
DEP_REVERT	If Zone is Zone AR, this field would hold that flood depth for the reverted zone. This field is populated when Zone equals AR and the reverted zone has a depth assigned.
SOURCE_CIT	Source Citation. Abbreviation used in the metadata file when describing the source information for the S_Fld_Haz_Ar table. Normally, the flood hazard area polygon will be divided to distinguish areas modified by the most recent revision from areas based on the effective FIRM prior to the most recent revision. Revisions and sources prior to the most recent revision will not be tracked for individual polygons in the flood hazard areas table in the standard database.
ACRES	Number of Acres.
COUNTY	The county name.
FLOODPLAIN	Floodplain description based on FLD_ZONE field. 100-YEAR FLOODPLAIN = This is an area inundated by 100-year flooding. 500-YEAR FLOODPLAIN = This is an area inundated by 500-year flooding. OPEN WATER = This area is an open water body. OUTSIDE FLOODPLAIN = This is an area outside the 100 and 500-year flood plains. UNDETERMINED = Areas with possible but undetermined flood hazards. No flood hazard analysis has been conducted. Flood insurance rates are commensurate with the uncertainty of the flood risk. Zone: D.
RISK_LEVEL	Floodplain area risk level based on FLD_ZONE field. HIGH RISK - COASTAL AREAS = In communities that participate in the NFIP, mandatory flood insurance purchase requirements apply to all of these zones: V, VE, V1 - 30. HIGH RISK AREAS = In communities that participate in the NFIP, mandatory flood insurance purchase requirements apply to all of these zones: A, AE, A1-A30, AH, AO, AR, A99. MODERATE RISK AREAS = In communities that participate in the NFIP, flood insurance is available to all property owners and renters in these zones: MODERATE TO LOW RISK AREAS = In communities that participate in the NFIP, flood insurance is available to all property owners and renters in these zones: B, C, and X. Insurance purchase is not required in these zones. OPEN WATER = Body of open water that has no defined flood hazard. UNDETERMINED = Areas with possible but undetermined flood hazards. No flood hazard analysis has been conducted. Flood insurance rates are commensurate with the uncertainty of the flood risk. Zone: D.
DESCRIPT	Based on SFHA_TF field description. INSIDE SPECIAL FLOOD HAZARD AREA = [SFHA_TF] - "T" value description. OUTSIDE SPECIAL FLOOD HAZARD AREA = [SFHA_TF] - "F" value description.
SOURCEDATE	Date the data was created by the Source.
FGDLAQDATE	Date FGDL acquired the data from the Source.
SHAPE	Feature geometry.
AUTOID	Unique ID added by GeoPlan
SHAPE.AREA	Area in meters
SHAPE.LEN	Perimeter in meters

The DFIRM Database is made up of several data themes containing both spatial and attribute information. These data together represent the current flood risk for the subject area as identified by FEMA. The attribute tables include SFHA locations, flood zone designations, BFEs, political entities, cross-section locations, FIRM panel information, and other data related to the NFIP.

USER NOTES:

When FEMA revises an FIS, adjacent studies are checked to ensure agreement between flood elevations at the boundaries. Likewise flood elevations at the confluence of streams studied independently are checked to ensure agreement at the confluence. The FIRM and the FIS are developed together and care is taken to ensure that the elevations and other features shown on the flood profiles in the FIS agree with the information shown on the FIRM. However, the elevations as shown on the FIRM are rounded whole-foot elevations. They must be shown so that a profile recreated from the elevations on the FIRM will match the FIS profiles within one half of one foot.

Data contained in the DFIRM Database files reflect the content of the source materials. Features may have been eliminated or generalized on the source graphic, due to scale and legibility constraints. With new mapping, FEMA plans to maintain full detail in the spatial data it produces. However, older information is often transferred from existing maps where some generalization has taken place. Flood risk data are developed for communities participating in the NFIP for use in insurance rating and for floodplain management. Flood hazard areas are determined using statistical analyses of records of river flow, storm tides, and rainfall; information obtained through consultation with the communities; floodplain topographic surveys; and hydrological and hydraulic analysis. Both detailed and approximate analyses are employed. Generally, detailed analyses are used to generate flood risk data only for developed or developing areas of communities. For areas where little or no development is expected to occur, FEMA uses approximate analyses to generate flood risk data. Typically, only drainage areas that are greater than one square mile are studied.

GeoPlan relied on the integrity of the attribute information within the original data.

** The following FEMA DFIRM information is from the frm_gsalb.pdf ** Table: S_Fld_Haz_Ar This table is required for all draft Digital Flood Insurance Rate Map data. The S_Fld_Haz_Ar table contains information about the flood hazards within the study area. A spatial file with locational information also corresponds with this data table. These zones are used by the federal Emergency Management Agency (FEMA) to designate the Special Flood Hazard Area (SFHA) and for insurance rating purposes. These data are the flood hazard areas that are or will be depicted on the Flood Insurance Rate Map (FIRM). A spatial file with locational information also corresponds with this data table. The spatial elements representing the flood zones are polygons. The entire area of the jurisdiction(s) mapped by the FIRM should have a corresponding flood zone polygon. There is one polygon for each contiguous flood zone designated. This is a modified Standard DFIRM Database table that includes Standard DFIRM Database items and Enhanced Database items. All items after SOURCE_CIT are Enhanced. Table: D_Zone Where the 1-percent-annual-chance flood or the 0.2-percent-annual-chance flood is contained in a culvert or channel, a corresponding feature appears in the S_Fld_Haz_Ar table only if an SFHA or 0.2-percent-annual-chance flood zone is shown on the FIRM in this area. In general, these culverts and channels are to be represented in the general structure table regardless of how the flood insurance risk zones are depicted. So, if these structures are shown on the FIRM as a dashed line passing through a Zone X, no corresponding flood insurance risk zone is shown in S_Fld_Haz_Ar table in the DFIRM database. If a narrow SFHA or 0.2-percent-annual-chance flood zone is shown on the FIRM, then a narrow polygon must be included in the DFIRM database. If the width of this flood insurance risk zone is accurately known and represented in the spatial data, the normal flood insurance risk zone is applied. If the width of the flood insurance risk zone is not accurately known and represented because of scale limitations, then the zone is designated as 1-percent-annual-chance flood contained in channel or 0.2-percent-annual-chance flood contained in channel as appropriate. ZONE_LID FLD_ZONE 1000 A 1001 AE 1002 AH 1003 AO 1004 AR 1005 1 PCT ANNUAL CHANCE FLOOD HAZARD CONTAINED IN CHANNEL 1006 1 PCT FUTURE CONDITIONS 1007 A99 1008 V 1009 VE 2000 0.2 PCT ANNUAL CHANCE FLOOD HAZARD 2001 0.2 PCT ANNUAL CHANCE FLOOD HAZARD CONTAINED IN CHANNEL 3000 AREA NOT INCLUDED 4000 D 4001 X PROTECTED BY LEVEE 4002 X 5000 OPEN WATER Flood Zone. This is the flood insurance risk zone designation. These zones are used by the Federal Emergency Management Agency (FEMA) to designate Special Flood Hazard Areas (SFHAs) and for insurance rating purposes. Some older FEMA FIRMs were prepared in the Standard format that uses Zones B, C and numbered A and V zones. Newer FIRMs use the Map Initiatives format where the B corresponds to 0.2 pct ANNUAL CHANCE FLOOD HAZARD; C corresponds to Zone X; numbered A zones (e.g., A1, A2, A3) correspond to Zone AE; and numbered V zones (e.g., V1, V2, V3) correspond to Zone VE. All Digital Flood Insurance Rate Maps (DFIRMs) should use the Map Initiatives zone designations. See Volume 1, Subsection 1.4.6.1.5 of these Guidelines for details on the flood insurance risk zones. (NOTE: The symbol '%' is a reserved symbol in most software packages so the word 'percent' was abbreviated to 'pct'.) Table: D_Floodway FLDWAY_LID FLOODWAY 1000 FLOODWAY 1010 COLORADO RIVER 1020 FLOODWAY CONTAINED IN CHANNEL 1030 FLOWAGE EASEMENT BOUNDARY 1040 STATE ENCROACHMENT 1050 AREA OF SPECIAL CONSIDERATION Table: D_Length_Units LEN_LID LEN_UNIT 1000 CENTIMETERS 1010 FEET 1020 INCHES 1030 KILOMETERS 1040 METERS 1050 MILES 1060 MILLIMETERS Table: D_Velocity_Units VEL_LID VEL_UNIT 1000 CENTIMETERS / DAY 1010 CENTIMETERS / HOUR 1020 FEET / SECOND 1030 INCHES / DAY 1040 INCHES / HOUR 1050 METERS / SECOND 1060 MICROMETERS / SECOND 1070 MILLIMETERS / DAY 1080 MILLIMETERS / HOUR

The FIRM is the basis for floodplain management, mitigation, and insurance activities for the National Flood Insurance Program (NFIP). Insurance applications include enforcement of the mandatory purchase requirement of the Flood Disaster Protection Act, which "... requires the purchase of flood insurance by property owners who are being assisted by Federal programs or by Federally supervised, regulated or insured agencies or institutions in the acquisition or improvement of land facilities located or to be located in identified areas having special flood hazards," Section 2 (b) (4) of the Flood Disaster Protection Act of 1973. In addition to the identification of Special Flood Hazard Areas (SFHAs), the risk zones shown on the FIRMs are the basis for the establishment of premium rates for flood coverage offered through the NFIP. The DFIRM Database presents the flood risk information depicted on the FIRM in a digital format suitable for use in electronic mapping applications. The DFIRM database is a subset of the Digital FIS database that serves to archive the information collected during the FIS.

The DFIRM Database consists of countywide vector files and associated attributes produced in conjunction with the hardcopy FEMA FIRM. The published effective FIRM and DFIRM are issued as the official designation of the SFHAs. As such they are adopted by local communities and form the basis for administration of the NFIP. For these purposes they are authoritative. Provisions exist in the regulations for public review, appeals and corrections of the flood risk information shown to better match real world conditions. As with any engineering analysis of this type, variation from the estimated flood heights and floodplain boundaries is possible. Details of FEMA's requirements for the FISs and flood mapping process that produces these data are available in the Guidelines and Specifications for Flood Hazard Mapping Partners. Horizontal accuracy was tested by manual comparison of source graphics with hardcopy plots and a symbolized display on an interactive computer graphic system. Independent quality control testing of FEMA's DFIRM database was also performed.

The DFIRM Database consists of countywide vector files and associated attributes produced in conjunction with the hardcopy FEMA FIRM. The published effective FIRM and DFIRM maps are issued as the official designation of the SFHAs. As such they are adopted by local communities and form the basis for administration of the NFIP. For these purposes they are authoritative. Provisions exist in the regulations for public review, appeals and corrections of the flood risk information shown to better match real world conditions. As with any engineering analysis of this type, variation from the estimated flood heights and floodplain boundaries is possible. Details of FEMA's requirements for the FISs and flood mapping process that produces these data are available in the Guidelines and Specifications for Flood Hazard Mapping Partners. Vertical accuracy was tested by manual comparison of source graphics with hardcopy plots and a symbolized display on an interactive computer graphic system. Independent quality control testing of FEMA's DFIRM database was also performed.

NONE

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:

FEMA Map Service Center http://msc.fema.gov ** What are you looking for? **** DFIRM Databases Guidelines and Specifications for Flood Hazard Mapping Partners http://www.fema.gov/library/viewRecord.do?id=2206 ** Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Database ** Appendix L: Part 1 ** Appendix L: Part 2

DATA LINEAGE SUMMARY:

The DFIRM Database is compiled in conjunction with the hardcopy FIRM and the final FIS report. The specifics of the hydrologic and hydraulic analyses performed are detailed in the FIS report. The results of these studies are submitted in digital format to FEMA. These data and unrevised data from effective FIRMs are compiled onto the base map used for DFIRM publication and checked for accuracy and compliance with FEMA standards. Process Date: 20070928 GeoPlan Center ordered the DFIRM database for the 20-available Florida Counties on 20071210. Data ordered contained both Unincorporated and Incorporated Areas. http://msc.fema.gov The data arrived on DVD for the following 20-counties; Alachua County Bay County Charlotte County Dixie County Escambia County Flagler County Gilchrist County Gulf County Lafayette County Lake County Leon County Monroe County Okaloosa County Osceola County Pinellas County Santa Rosa County Seminole County St. Johns County Suwannee County Volusia County The countywide Digital Flood Insurance Rate Map (DFIRM) Flood Hazards Databases were originally called: S_fld_haz_ar.shp The data was reprojected from various UTM projections to the FGDL Albers HPGN NAD83 projection. GeoPlan then added the following fields. ACRES COUNTY FLOODPLAIN RISK_LEVEL DESCRIPT SOURCEDATE FGDLAQDATE AUTOID Crosswalk Table This crosswalk table was used to populate the FLOODPLAIN and RISK_LEVEL fields. The crosswalk table / shapefile join was based on the FLDZ field in the table and the FLDZONE field within the shapefile. FLDZ FDLZ_DSCPT FLOODPLAIN B MODERATE TO LOW RISK AREAS OUTSIDE FLOODPLAIN C MODERATE TO LOW RISK AREAS OUTSIDE FLOODPLAIN X MODERATE TO LOW RISK AREAS OUTSIDE FLOODPLAIN A HIGH RISK AREAS 100-YEAR FLOODPLAIN AE HIGH RISK AREAS 100-YEAR FLOODPLAIN A1 HIGH RISK AREAS 100-YEAR FLOODPLAIN A2 HIGH RISK AREAS 100-YEAR FLOODPLAIN A3 HIGH RISK AREAS 100-YEAR FLOODPLAIN A4 HIGH RISK AREAS 100-YEAR FLOODPLAIN A5 HIGH RISK AREAS 100-YEAR FLOODPLAIN A6 HIGH RISK AREAS 100-YEAR FLOODPLAIN A7 HIGH RISK AREAS 100-YEAR FLOODPLAIN A8 HIGH RISK AREAS 100-YEAR FLOODPLAIN A9 HIGH RISK AREAS 100-YEAR FLOODPLAIN A10 HIGH RISK AREAS 100-YEAR FLOODPLAIN A11 HIGH RISK AREAS 100-YEAR FLOODPLAIN A12 HIGH RISK AREAS 100-YEAR FLOODPLAIN A13 HIGH RISK AREAS 100-YEAR FLOODPLAIN A14 HIGH RISK AREAS 100-YEAR FLOODPLAIN A15 HIGH RISK AREAS 100-YEAR FLOODPLAIN A16 HIGH RISK AREAS 100-YEAR FLOODPLAIN A17 HIGH RISK AREAS 100-YEAR FLOODPLAIN A18 HIGH RISK AREAS 100-YEAR FLOODPLAIN A19 HIGH RISK AREAS 100-YEAR FLOODPLAIN A20 HIGH RISK AREAS 100-YEAR FLOODPLAIN A21 HIGH RISK AREAS 100-YEAR FLOODPLAIN A22 HIGH RISK AREAS 100-YEAR FLOODPLAIN A23 HIGH RISK AREAS 100-YEAR FLOODPLAIN A24 HIGH RISK AREAS 100-YEAR FLOODPLAIN A25 HIGH RISK AREAS 100-YEAR FLOODPLAIN A26 HIGH RISK AREAS 100-YEAR FLOODPLAIN A27 HIGH RISK AREAS 100-YEAR FLOODPLAIN A28 HIGH RISK AREAS 100-YEAR FLOODPLAIN A29 HIGH RISK AREAS 100-YEAR FLOODPLAIN A30 HIGH RISK AREAS 100-YEAR FLOODPLAIN AH HIGH RISK AREAS 100-YEAR FLOODPLAIN AO HIGH RISK AREAS 100-YEAR FLOODPLAIN AR HIGH RISK AREAS 100-YEAR FLOODPLAIN A99 HIGH RISK AREAS 100-YEAR FLOODPLAIN D UNDETERMINED UNDETERMINED V HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN VE HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V1 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V2 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V3 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V4 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V5 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V6 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V7 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V8 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V9 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V10 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V11 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V12 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V13 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V14 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V15 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V16 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V17 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V18 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V19 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V20 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V21 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V22 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V23 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V24 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V25 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V26 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V27 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V28 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V29 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN V30 HIGH RISK - COASTAL AREAS 100-YEAR FLOODPLAIN 0.2 PCT ANNUAL CHANCE FLOOD HAZARD MODERATE RISK AREAS 500-YEAR FLOODPLAIN OPEN WATER OPEN WATER OPEN WATER The final process step involved the merging of the 20 counties to create one partial coverage statewide layer. It was noted that 11 sliver polygons existed (primarily in Charlotte County). However, no methodology was performed by GeoPlan to correct for these issues. For more information on FEMA's Final Data Structure concerning sliver polygons please see below. The FEMA report frm_gsal.pdf states the following regarding sliver polygons. L.3.5.2 Topology Vector data files must meet the following data structure requirements: * Area spatial features for a given theme must cover the entire study area without overlaps, underlaps or sliver polygons between adjacent polygons. Process Date: 20071210 GeoPlan Center ordered the DFIRM database for Baker County Florida on 20080411. The data arrived on DVD and the order contained both Unincorporated and Incorporated Areas. http://msc.fema.gov The countywide Digital Flood Insurance Rate Map (DFIRM) Flood Hazards Database was originally called: S_fld_haz_ar.shp The data was reprojected from NAD_1983_StatePlane_Florida_North_FIPS_0903_Feet to the FGDL Albers HPGN NAD83 projection. GeoPlan then added the following fields. ACRES COUNTY FLOODPLAIN RISK_LEVEL DESCRIPT SOURCEDATE FGDLAQDATE AUTOID Crosswalk Table This crosswalk table was used to populate the FLOODPLAIN and RISK_LEVEL fields. The crosswalk table / shapefile join was based on the FLDZ field in the table and the FLDZONE field within the shapefile. The final process step involved the merging of the Baker County information with the existing SDE layer DFIRM_FLDHAZ_DEC07, creating a partial coverage statewide layer consisting of 21 counties. Process Date: 20080425 GeoPlan Center downloaded the DFIRM database for the following six Florida counties on 20090415. Columbia County Record Count: 4252 NAD_1983_HARN_StatePlane_Florida_North_FIPS_0903_Feet Gadsden County Record Count: 2235 NAD_1983_HARN_StatePlane_Florida_North_FIPS_0903_Feet Hillsborough County Record Count: 6377 NAD_1983_StatePlane_Florida_West_FIPS_0902_Feet Lee County Record Count: 1277 NAD_1983_StatePlane_Florida_West_FIPS_0902_Feet Marion County Record Count: 5808 NAD_1983_StatePlane_Florida_West_FIPS_0902_Feet Union County Record Count: 3701 NAD_1983_HARN_StatePlane_Florida_North_FIPS_0903_Feet The downloaded data contained both Unincorporated and Incorporated Areas. http://msc.fema.gov The countywide Digital Flood Insurance Rate Map (DFIRM) Flood Hazards Database was originally called: S_fld_haz_ar.shp The data was reprojected to the FGDL Albers HPGN NAD83 HARN projection. GeoPlan then added the following fields. ACRES COUNTY FLOODPLAIN RISK_LEVEL DESCRIPT SOURCEDATE FGDLAQDATE AUTOID Crosswalk Table This crosswalk table was used to populate the FLOODPLAIN and RISK_LEVEL fields. The crosswalk table / shapefile join was based on the FLDZ field in the table and the FLDZONE field within the shapefile. The final process step involved the merging the information for the six counties with the existing SDE layer DFIRM_FLDHAZ_APR08, creating a partial coverage statewide layer consisting of 27 counties. Process Date: 20090415 Data imported to ArcSDE and exported as a shapefile. Process Date: 20090421

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:

Federal Emergency Management Agency
FEMA
500 C Street, S.W.
Washington, District of Columbia
20472
1-800-358-9616


www.msc.fema.gov
www.msc.fema.gov

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