BASE FLOOD ELEVATION (BFE) LINES OF THE DIGITAL FLOOD INSURANCE RATE MAP (DFIRM) IN THE STATE OF FLORIDA - JULY 2011

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Federal Emergency Management Agency
Publication_Date: 20110704
Title:
BASE FLOOD ELEVATION (BFE) LINES OF THE DIGITAL FLOOD INSURANCE RATE MAP (DFIRM) IN THE STATE OF FLORIDA - JULY 2011
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Washington, DC
Publisher: Federal Emergency Management Agency
Other_Citation_Details:
Alachua County, Baker County, Bay County, Charlotte County, Columbia County, Dixie County, Escambia County, Flagler County, Gadsden County, Gilchrist County, Gulf County, Hamilton County, Hillsborough County, Holmes County, Jackson County, Lafayette County, Lake County, Lee County, Leon County, Madison County, Marion County, Nassau County, Okaloosa County, Osceola County, Orange County, Pinellas County, Santa Rosa County, Seminole County, St. Johns County, Suwannee County, Taylor County, Union County, Volusia County, Walton County, and Washington County.
Online_Linkage: <http://www.msc.fema.gov>
Description:
Abstract:
This dataset contains information about the Base Flood Elevations (BFE) within a study area. BFE lines indicate the rounded whole-foot water surface elevation of the 1-percent-annual-chance flood. The spatial elements representing BFE features are lines extending from Special Flood Hazard Area (SFHA) boundary to SFHA boundary. The BFE lines will have no visible gaps or overshoots between the SFHA boundary and the end of the BFE line at the publication scale of the DFIRM. However, the ends of the BFE lines are not necessarily snapped precisely to the SFHA boundary. Each BFE is represented by a single line. The Base Flood Elevation (BFE) information is required for any digital data where BFE lines will be shown on the corresponding Flood Insurance Rate Map (FIRM). Normally if there are any riverine AE zones, BFE lines are required. While BFE lines are depicted as wavy lines on the hardcopy FIRM, they should be primarily straight lines in the spatial data, although they may bend consistent with procedures described in Volume 1 of these Guidelines.

The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event (100 year), the 0.2-percent-annual-chance flood event (500 year), and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by FEMA. This dataset is an update to the DFIRM_BFE_DEC10.shp layer.
Purpose:
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.
Supplemental_Information:
** The following FEMA DFIRM information is from the frm_gsalb.pdf **
Table: S_BFE The Base Flood Elevation (BFE) table is required for any digital data where BFE lines will be shown on the corresponding Flood Insurance Rate Map (FIRM). Normally if there are any riverine AE zones, BFE lines are required. The S_BFE table contains information about the BFEs within a study area. A spatial file with locational information also corresponds with this data table. BFE lines indicate the rounded whole-foot water surface elevation of the 1-percent-annual-chance flood. The spatial elements representing BFE features are lines extending from Special Flood Hazard Area (SFHA) boundary to SFHA boundary. The BFE lines will have no visible gaps or overshoots between the SFHA boundary and the end of the BFE line at the publication scale of the DFIRM. However, the ends of the BFE lines are not necessarily snapped precisely to the SFHA boundary. Each BFE is represented by a single line. While BFE lines are depicted as wavy lines on the hardcopy FIRM, they should be primarily straight lines in the spatial data, although they may bend consistent with procedures described in Volume 1 of these Guidelines.
Table: D_Length_Units LEN_LID LEN_UNIT 1000 CENTIMETERS 1010 FEET 1020 INCHES 1030 KILOMETERS 1040 METERS 1050 MILES 1060 MILLIMETERS
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20010606
Ending_Date: 20110704
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -87.429040
East_Bounding_Coordinate: -79.872251
North_Bounding_Coordinate: 30.983191
South_Bounding_Coordinate: 24.492815
Keywords:
Theme:
Theme_Keyword_Thesaurus: NONE
Theme_Keyword: FEMA Flood Hazard Zone
Theme_Keyword: DFIRM
Theme_Keyword: Digital Flood Insurance Rate Map
Theme_Keyword: Special Flood Hazard Area
Theme_Keyword: DFIRM Database
Theme_Keyword: NFIP
Theme_Keyword: SFHA
Theme_Keyword: Flood Insurance Rate Map
Theme_Keyword: FIRM
Theme_Keyword: Riverine flooding
Theme_Keyword: Floodway
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: inlandWaters
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: FLORIDA
Place_Keyword: ALACHUA COUNTY
Place_Keyword: BAY COUNTY
Place_Keyword: CHARLOTTE COUNTY
Place_Keyword: DIXIE COUNTY
Place_Keyword: ESCAMBIA COUNTY
Place_Keyword: FLAGLER COUNTY
Place_Keyword: GILCHRIST COUNTY
Place_Keyword: GULF COUNTY
Place_Keyword: LAFAYETTE COUNTY
Place_Keyword: LAKE COUNTY
Place_Keyword: LEON COUNTY
Place_Keyword: OKALOOSA COUNTY
Place_Keyword: OSCEOLA COUNTY
Place_Keyword: PINELLAS COUNTY
Place_Keyword: ST. JOHNS COUNTY
Place_Keyword: SEMINIOLE COUNTY
Place_Keyword: SUWANNEE COUNTY
Place_Keyword: VOLUSIA COUNTY
Place_Keyword: SANTA ROSA COUNTY
Place_Keyword: BAKER COUNTY
Place_Keyword: COLUMBIA COUNTY
Place_Keyword: GADSDEN COUNTY
Place_Keyword: HILLSBOROUGH COUNTY
Place_Keyword: LEE COUNTY
Place_Keyword: MARION COUNTY
Place_Keyword: UNION COUNTY
Place_Keyword: ORANGE COUNTY
Place_Keyword: TAYLOR COUNTY
Place_Keyword: HAMILTON COUNTY
Place_Keyword: MADISON COUNTY
Place_Keyword: HOLMES COUNTY
Place_Keyword: JACKSON COUNTY
Place_Keyword: NASSAU COUNTY
Place_Keyword: WALTON COUNTY
Place_Keyword: WASHINGTON COUNTY
Access_Constraints: NONE
Use_Constraints:
NONE
FEMA Disclaimer: No warranty expressed or implied is made by FEMA regarding the utility of the data on any other system nor shall the act of distribution constitute any such warranty. FEMA will warrant the delivery of this product in a computer-readable format, and will offer appropriate adjustment of credit when the product is determined unreadable by correctly adjusted computer input peripherals, or when the physical medium is delivered in damaged condition. Requests for adjustment of credit must be made within 90 days from the date of this shipment from the ordering site.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Federal Emergency Management Agency
Contact_Position: Federal Insurance and Mitigation Administration
Contact_Address:
Address_Type: mailing address
Address: 500 C Street, S.W.
City: Washington
State_or_Province: District of Columbia
Postal_Code: 20472
Country: USA
Contact_Voice_Telephone: 1-800-358-9616
Contact_Electronic_Mail_Address: www.msc.fema.gov
Data_Set_Credit: FEMA
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.4000
Cross_Reference:
Citation_Information:
Originator: Federal Emergency Management Agency
Publication_Date: 20060616
Title: Flood Insurance Study, FLORIDA
Geospatial_Data_Presentation_Form: document
Publication_Information:
Publication_Place: Washington, DC
Publisher: Federal Emergency Management Agency
Other_Citation_Details:
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
Cross_Reference:
Citation_Information:
Originator: Federal Emergency Management Agency
Publication_Date: 20060616
Title: Flood Insurance Rate Map, FLORIDA
Geospatial_Data_Presentation_Form: Map
Publication_Information:
Publication_Place: Washington, DC
Publisher: Federal Emergency Management Agency
Cross_Reference:
Citation_Information:
Originator: Federal Emergency Management Agency
Publication_Date: 20060616
Title: Raster DFIRM, FLORIDA
Geospatial_Data_Presentation_Form: Raster Digital Data
Publication_Information:
Publication_Place: Washington, DC
Publisher: Federal Emergency Management Agency
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
GeoPlan relied on the integrity of the attribute information within the original data.
Logical_Consistency_Report:
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.
Completeness_Report:
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.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
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.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
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.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 1994
Title: Digital Orthophoto Quadrangle
Geospatial_Data_Presentation_Form: Remote sensing image
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
The digital orthophoto quadrangle (DOQ) is a 1-meter ground resolution, quarter-quadrangle (3.75-minutes of latitude by 3.75-minutes of longitude) image cast on the Universal Transverse Mercator Projection (UTM) on the North American Datum of 1983 (NAD83). The imagery is based on panchromatic black and white (or color infra-red) NAPP or NAPP-like photography.
Source_Scale_Denominator: 12000
Type_of_Source_Media: online
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1994
Source_Currentness_Reference: Ground conditions
Source_Citation_Abbreviation: FEMA
Source_Contribution: Spatial and Attribute Information
Source_Information:
Source_Citation:
Citation_Information:
Originator: Federal Emergency Management Agency
Publication_Date: 20070928
Title: Flood Insurance Study
Geospatial_Data_Presentation_Form: Map and report
Publication_Information:
Publication_Place: Washington, D.C.
Publisher: Federal Emergency Management Agency
Other_Citation_Details:
Scales of source are: 4800, 6000, 12000, 24000
The FIS and FIRM are the basis for floodplain management, mitigation, and insurance activities for the National Flood Insurance Program (NFIP). This DFIRM includes data previously published by FEMA in the following Flood Insurance Studies: fema96.shp
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20070928
Source_Currentness_Reference: FIS Effective dates
Source_Citation_Abbreviation: FIS1
Source_Contribution: Spatial and Attribute Information
Source_Information:
Source_Citation:
Citation_Information:
Originator: Federal Emergency Management Agency
Publication_Date: 20070928
Title: FLORIDA, Digital Flood Insurance Rate Map
Geospatial_Data_Presentation_Form: Vector digital data
Publication_Information:
Publication_Place: Washington, D.C.
Publisher: Federal Emergency Management Agency
Other_Citation_Details:
Scales of source are: 6000, 12000
Grid of FIRM panels created for this Flood Insurance Study.
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20070928
Source_Currentness_Reference: Effective date
Source_Citation_Abbreviation: STUDY1
Source_Contribution: Spatial and Attribute Information
Source_Information:
Source_Citation:
Citation_Information:
Originator: National Geodetic Survey
Publication_Date: 20070928
Title: Geodetic bench mark positions and descriptions
Geospatial_Data_Presentation_Form: Vector digital data
Publication_Information:
Publication_Place: Silver Spring, MD
Publisher: National Geodetic Survey
Other_Citation_Details:
Scale of source 24000 The National Geodetic Survey (NGS) serves as the Nation's depository for geodetic data in the National Spatial Reference System. These geodetic data include bench marks and other control points that provide the base of reference for latitude, longitude, height, scale, orientation, and gravity measurements used throughout the United States.
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20070928
Source_Currentness_Reference: Publication date
Source_Citation_Abbreviation: NGS1
Source_Contribution: Spatial and Attribute Information
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 1994
Title: FLORIDA, Base Map
Geospatial_Data_Presentation_Form: Vector digital data
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
On selected FIRM panels, planimetric base map information was provided in digital format. These files were compiled at scales of 1:12,000 from aerial photography dated 1994 or later. Additional information was derived from U.S. Geological Survey (USGS) Digital Line Graphs.
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1994
Source_Currentness_Reference: Ground conditions
Source_Citation_Abbreviation: BASE1
Source_Contribution: Spatial and Attribute Information
Source_Information:
Source_Citation:
Citation_Information:
Originator: Federal Emergency Management Agency
Publication_Date: 20070928
Title: FLORIDA, Digital Flood Insurance Rate Map
Geospatial_Data_Presentation_Form: Vector digital data
Publication_Information:
Publication_Place: Washington, D.C.
Publisher: Federal Emergency Management Agency
Other_Citation_Details:
Scale of source data 12000.
Base map surface water features digitized from U.S. Geological Survey Digital Orthophoto Quadrangles.
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20070928
Source_Currentness_Reference: Effective date
Source_Citation_Abbreviation: STUDY2
Source_Contribution: Spatial and Attribute Information
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 1999
Title: 7.5-Minute Quadrangle Grid
Geospatial_Data_Presentation_Form: Vector digital data
Publication_Information:
Publication_Place: Redlands, CA
Publisher: ESRI
Other_Citation_Details:
Scale of source data 24000
Grid of USGS 7.5-Minute Series Topographic Maps.
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1999
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: USGS1
Source_Contribution: Spatial and Attribute Information
Process_Step:
Process_Description:
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.
Source_Used_Citation_Abbreviation: DOQ1, FIS1, STUDY1, NGS1, BASE1, STUDY2, USGS1
Process_Date: 20060616
Process_Step:
Process_Description:
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 - (NOTE: No BFE Data Available) 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) Base Flood Elevations (BFE) Databases were originally called: S_BFE.shp
The data was reprojected from various UTM projections to the FGDL Albers HPGN NAD83 projection.
GeoPlan then added the following fields. COUNTY DESCRIPT SOURCEDATE FGDLAQDATE AUTOID
The final process step involved the merging of the 19 counties to create one partial coverage statewide layer.
Source_Used_Citation_Abbreviation: GeoPlan
Process_Date: 20071210
Process_Step:
Process_Description: Data imported to ArcSDE and exported as a Shapefile.
Source_Used_Citation_Abbreviation: GeoPlan
Process_Date: 20080125
Process_Step:
Process_Description:
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) Base Flood Elevations (BFE) Database was originally called: S_BFE.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. COUNTY DESCRIPT SOURCEDATE FGDLAQDATE AUTOID
The final process step involved the merging of the Baker County information with the existing SDE layer DFIRM_BFE_DEC07, creating a partial coverage statewide layer consisting of 20 counties.
Source_Used_Citation_Abbreviation: GeoPlan
Process_Date: 20080425
Process_Step:
Process_Description: Data imported to ArcSDE and exported as a Shapefile.
Source_Used_Citation_Abbreviation: GeoPlan
Process_Date: 20080521
Process_Step:
Process_Description:
GeoPlan Center downloaded the DFIRM database for the following six Florida counties on 20090415.
Columbia County Record Count: 248 NAD_1983_HARN_StatePlane_Florida_North_FIPS_0903_Feet
Gadsden County Record Count: 436 NAD_1983_HARN_StatePlane_Florida_North_FIPS_0903_Feet
Hillsborough County Record Count: 3168 NAD_1983_StatePlane_Florida_West_FIPS_0902_Feet
Lee County Record Count: 632 NAD_1983_StatePlane_Florida_West_FIPS_0902_Feet
Marion County Record Count: 42 NAD_1983_StatePlane_Florida_West_FIPS_0902_Feet
Union County Record Count: 34 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) Base Flood Elevations (BFE) Database was originally called: S_BFE.shp
The data was reprojected to the FGDL Albers HPGN NAD83 HARN projection.
GeoPlan then added the following fields. COUNTY DESCRIPT SOURCEDATE FGDLAQDATE AUTOID

The final process step involved the merging the information for the six counties with the existing SDE layer DFIRM_BFE_APR08, creating a partial coverage statewide layer consisting of 26 counties.
Source_Used_Citation_Abbreviation: GeoPlan
Process_Date: 20090204
Process_Step:
Process_Description:
GeoPlan Center downloaded the DFIRM database for the following two Florida counties on 20090910.
Orange County Record Count: 760 NAD_1983_StatePlane_Florida_East_FIPS_0901_Feet
Taylor County Record Count: 229 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) Base Flood Elevations (BFE) Database was originally called: S_BFE.shp
The data was reprojected to the FGDL Albers HPGN NAD83 HARN projection.
GeoPlan then added the following fields. COUNTY DESCRIPT SOURCEDATE FGDLAQDATE
The final process step involved the merging the information for the two counties with the existing SDE layer DFIRM_BFE_FEB09, creating a partial coverage statewide layer consisting of 28 counties.
Source_Used_Citation_Abbreviation: GeoPlan
Process_Date: 20090910
Process_Step:
Process_Description:
GeoPlan Center downloaded the DFIRM database for the following two Florida counties on 20100301.
Hamilton County Record Count: 253 NAD_1983_HARN_StatePlane_Florida_North_FIPS_0903_Feet
Madison County Record Count: 176 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) Base Flood Elevations (BFE) Database was originally called: S_BFE.shp
The data was reprojected to the FGDL Albers HPGN NAD83 HARN projection.
GeoPlan then added the following fields. COUNTY DESCRIPT SOURCEDATE FGDLAQDATE
The final process step involved the merging the information for the two counties with the existing SDE layer DFIRM_BFE_SEP09, creating a partial coverage statewide layer consisting of 30 counties.
Source_Used_Citation_Abbreviation: GeoPlan
Process_Date: 20100301
Process_Step:
Process_Description:
GeoPlan Center downloaded the DFIRM database for the following four Florida counties on 20110110.
Holmes County Record Count: 733 NAD_1983_HARN_StatePlane_Florida_North_FIPS_0903_Feet
Jackson County Record Count: 518 NAD_1983_HARN_StatePlane_Florida_North_FIPS_0903_Feet
Nassau County Record Count: 7 NAD_1983_StatePlane_Florida_East_FIPS_0901_Feet
Walton County Record Count: 470 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) Base Flood Elevations (BFE) Database was originally called: S_BFE.shp
The data was reprojected to the FGDL Albers HPGN NAD83 HARN projection.
GeoPlan then added the following fields. COUNTY DESCRIPT SOURCEDATE FGDLAQDATE
The final process step involved the merging the information for the four counties with the existing SDE layer DFIRM_BFE_MAR10, creating a partial coverage statewide layer consisting of 34 counties.
Source_Used_Citation_Abbreviation: GeoPlan
Process_Date: 20110110
Process_Step:
Process_Description:
GeoPlan Center Process Steps: On June 8th, 2011 it was noted that there was a projection issue with the DFIRM layer for Okaloosa County. The DFIRM FEMA Okaloosa County layer was compared with another DFIRM layer available for download from the county. Upon comparison it was noted that there was a shift in the dataset. The layer was then extensively reviewed and it was determined that the layer in FGDL was not properly projected due to an incompatibility issue between the original projection file and ESRI software. More specifically, ESRI ArcGIS software does not properly recognize the original DFIRM projection file, and hence does not perform both transformations necessary to project from the DFIRM projection (NAD27 UTM) to the FGDL Albers projection (NAD83 HARN Florida).
To solve the projection file incompatibility issue, GeoPlan first redefined the originally downloaded, non-projected DFIRM layer to a matching projection file supplied by ESRI. Upon reprojecting with this new projection file, the two transformations properly occurred and the layer then accurately aligned with the data Okaloosa County has available for download.
Please note: redefining a layer's original projection is not part of GeoPlan's normal QAQC procedures and is only done when a layer does not have an associated projection file (which is rare).
Because of this projection issue, GeoPlan reviewed the projections and spatial accuracy of all BFE DFIRM county layers distributed in FGDL. Upon review, it was noted that the following counties had the same incompatibility issue with their original projection files, resulting in a shift of spatial features: Bay County, Charlotte County, Lake County, Osceola County, and St Johns County.
Using the incompatible projection files, the average shift measurements for these counties is as follows:
Bay County [county-wide average shift = 0.39 meters] - Original Projection: NAD27 UTM, Zone 16 North, Meter
Charlotte County [county-wide average shift = 0.39 meters] - Original Projection: NAD83 UTM, Zone 17 North, Meter
Lake County [county-wide average shift = 37 meters] - Original Projection: NAD27 UTM, Zone 17 North, Meter
Okaloosa County [county-wide average shift = 21 meters] - Original Projection: NAD27 UTM, Zone 16 North, Meter
Osceola County [county-wide average shift = 37 meters] - Original Projection: NAD27 UTM, Zone 17 North, Meter
St. Johns County [county-wide average shift = 0.39 meters] - Original Projection: NAD83 UTM, Zone 17 North, Meter
For Bay County, it was later determined that while their projection file indicated a datum of NAD27, the data was actually in NAD83 projection, which resulted in a much smaller shift. Please note that Bay County was still re-downloaded and re-projected.
------------------------------------------------------ Okaloosa Projection Example: ------------------------------------------------------
Original Projection File:
PROJCS["NAD27 UTM, Zone 16 North, Meter", GEOGCS["North_American_Datum_1927", DATUM["D_North_American_1927", SPHEROID["Clarke - 1866",6378206.4,294.978698213901]], PRIMEM["Greenwich",0], UNIT["degree",0.0174532925199433]], PROJECTION["Transverse_Mercator"], PARAMETER["latitude_of_origin",0], PARAMETER["central_meridian",-87], PARAMETER["scale_factor",0.9996], PARAMETER["false_easting",500000], PARAMETER["false_northing",0], UNIT["METER",1]]
------------------------------------------------------
Redefined Projection File:
PROJCS["NAD_1927_UTM_Zone_16N", GEOGCS["GCS_North_American_1927", DATUM["D_North_American_1927", SPHEROID["Clarke_1866",6378206.4,294.9786982]], PRIMEM["Greenwich",0.0], UNIT["Degree",0.0174532925199433]], PROJECTION["Transverse_Mercator"], PARAMETER["False_Easting",500000.0], PARAMETER["False_Northing",0.0], PARAMETER["Central_Meridian",-87.0], PARAMETER["Scale_Factor",0.9996], PARAMETER["Latitude_Of_Origin",0.0], UNIT["Meter",1.0]] ------------------------------------------------------
Source_Used_Citation_Abbreviation: GeoPlan
Process_Date: 20110608
Process_Step:
Process_Description:
GeoPlan Center downloaded the DFIRM database for the following seven Florida counties on 20110609.
Bay County Record Count: 615 NAD_1983_HARN_StatePlane_Florida_North_FIPS_0903_Feet
Dixie County Record Count: 60 NAD_1983_StatePlane_Florida_North_FIPS_0903_Feet
Gulf County Record Count: 60 NAD_1983_HARN_StatePlane_Florida_North_FIPS_0903_Feet
Leon County Record Count: 701 NAD_1983_HARN_StatePlane_Florida_North_FIPS_0903_Feet
Pinellas County Record Count: 434 NAD_1927_UTM_Zone_17N
St. Johns County Record Count: 560 NAD_1983_StatePlane_Florida_East_FIPS_0901_Feet
Washington County Record Count: 1235 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) Base Flood Elevations (BFE) Database was originally called: S_BFE.shp
The data was reprojected to the FGDL Albers HPGN NAD83 HARN projection.
GeoPlan then added the following fields. COUNTY DESCRIPT SOURCEDATE FGDLAQDATE
The final process step involved the merging the information for the new and updated counties with the existing SDE layer DFIRM_BFE_DEC10, creating a partial coverage statewide layer consisting of 35 counties.
Source_Used_Citation_Abbreviation: GeoPlan
Process_Date: 20110609
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 15671
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Albers Conical Equal Area
Albers_Conical_Equal_Area:
Standard_Parallel: 24.000000
Standard_Parallel: 31.500000
Longitude_of_Central_Meridian: -84.000000
Latitude_of_Projection_Origin: 24.000000
False_Easting: 400000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.002048
Ordinate_Resolution: 0.002048
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: D_North_American_1983_HARN
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: NAVD88
Altitude_Resolution: 0.03
Altitude_Distance_Units: feet
Altitude_Encoding_Method: Attribute values
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: DFIRM_BFE_JUL11
Entity_Type_Definition: DFIRM_BFE_JUL11.DBF
Entity_Type_Definition_Source: FEMA
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: BFE_LN_ID
Attribute_Definition: Primary key for table lookup. Assigned by table creator.
Attribute_Definition_Source: FEMA
Attribute:
Attribute_Label: ELEV
Attribute_Definition:
BFE. The rounded, whole-foot elevation of the 1-percent-annual-chance flood. This is the value of the BFE that is printed next to the BFE line on the FIRM.
Attribute_Definition_Source: FEMA
Attribute:
Attribute_Label: LEN_UNIT
Attribute_Definition:
BFE Units. This unit indicates the measurement system used for the BFEs. Normally this would be feet. Acceptable values for this field are listed in the D_Length_Units table.
Attribute_Definition_Source: FEMA
Attribute:
Attribute_Label: V_DATUM
Attribute_Definition:
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. Acceptable values for this field are listed in the D_V_Datum table.
Attribute_Definition_Source: FEMA
Attribute:
Attribute_Label: SOURCE_CIT
Attribute_Definition:
Source Citation. Abbreviation used in the metadata file when describing the source information for the S_BFE table.
Attribute_Definition_Source: FEMA
Attribute:
Attribute_Label: COUNTY
Attribute_Definition: The county name.
Attribute_Definition_Source: GeoPlan
Attribute:
Attribute_Label: DESCRIPT
Attribute_Definition: Based on fields [ELEV] and [LEN_UNIT].
Attribute_Definition_Source: GeoPlan
Attribute:
Attribute_Label: SOURCEDATE
Attribute_Definition: The date the Source created the data.
Attribute_Definition_Source: GeoPlan
Attribute:
Attribute_Label: FGDLAQDATE
Attribute_Definition: The date FGDL acquired the data from the Source.
Attribute_Definition_Source: GeoPlan
Attribute:
Attribute_Label: AUTOID
Attribute_Definition: Unique ID added by GeoPlan
Attribute_Definition_Source: GeoPlan
Attribute:
Attribute_Label: SHAPE.LEN
Attribute_Definition: Length in meters
Attribute_Definition_Source: GeoPlan
Overview_Description:
Entity_and_Attribute_Overview:
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.
Entity_and_Attribute_Detail_Citation:
Appendix L of FEMA's Guidelines and Specifications for FEMA Flood Hazard Mapping Partners contains a detailed description of each attribute code and a reference to other relevant information. The following tables are included in this data set:
l_comm_info l_stn_start study_info s_bfe s_base_index s_firm_pan s_fld_haz_ar s_fld_haz_ln s_gen_struct s_label_ld s_perm_bmk s_pol_ar s_pol_ln s_quad_index s_wtr_ln s_xs s_label_pt
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Florida Geographic Data Library (FGDL)
Contact_Address:
Address_Type: mailing address
Address: 431 Architecture PO Box 115706
City: Gainesville
State_or_Province: Florida
Postal_Code: 32611-5706
Country: United States
Contact_Electronic_Mail_Address: Web site: <http://www.fgdl.org>
Contact_Electronic_Mail_Address: Technical Support: <http://www.fgdl.org/fgdlfeed.html>
Contact_Electronic_Mail_Address: For FGDL Software: <http://www.fgdl.org/software.html>
Contact_Electronic_Mail_Address:
FGDL Frequently Asked Questions: <http://www.fgdl.org/fgdlfaq.html>
Contact_Electronic_Mail_Address: Mailing list for FGDL: <http://www.fgdl.org/fgdl-l.html>
Resource_Description: DOWNLOADABLE DATA
Distribution_Liability:
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>
Standard_Order_Process:
Non-digital_Form:
Printed FIRMs and Raster DFIRMs that match this data set are available from FEMA at the Map Service Center, cited above.
Fees: Contact Distributor
Technical_Prerequisites:
This data is intended for use with a Geographic Information Systems or Remote Sensing software package.
Metadata_Reference_Information:
Metadata_Date: 20110827
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Federal Emergency Management Agency
Contact_Position: Federal Insurance and Mitigation Administration
Contact_Address:
Address_Type: mailing address
Address: 500 C Street, S.W.
City: Washington
State_or_Province: District of Columbia
Postal_Code: 20472
Country: USA
Contact_Voice_Telephone: 1-800-358-9616
Contact_Electronic_Mail_Address: www.msc.fema.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.6 on Sat Aug 27 13:11:44 2011