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2Q==C6C6830C-2DCE-4CF0-BF9B-9E912ADA9C74datasetFlood Map Service CenterFederal Emergency Management AgencyFederal Insurance and Mitigation Administration1-800-358-9616500 C Street SWWashingtonDC20472USwww.msc.fema.gov20260409ArcGIS Metadata1.00.000Florida Geographic Data Library (FGDL)Jonathan and Melanie Antevy Hall1480 Inner Road, Room 431PO Box 115706GainesvilleFL32611-5706UShttps://fgdl.org/info/contact/NoneDOWNLOADABLE DATAhttps://www.fgdl.org/Raster DatasetFlood Hazard Zones of the Digital Flood Insurance Rate Map (DFIRM) in the State of Florida - 100/500-Year Floodplain - April 20262026-04-09T00:00:00NFHL Florida Data Product ID: NFHL_12_20260409, ESRI FGDBFederal Emergency Management Agency500 C Street SW, Washington, DC, 20472, USFederal Emergency Management AgencyState of FloridaNational Flood Hazard Layer (NFHL)vector digital data<DIV STYLE="text-align:Left;"><P><SPAN>This is a raster data set with a 10-meter cell size based on the DFIRM_FLDHAZ vector layer. This layer represents area within or outside 100-year or 500-year floodplain.</SPAN></P></DIV>This is a raster data set with a 10-meter cell size based on the DFIRM_FLDHAZ vector layer. This layer represents area within or outside 100-year or 500-year floodplain.FEMA National Flood Hazard Layer (NFHL) Status https://www.floodmaps.fema.gov/NFHL/status.shtml FEMA Flood Map Service Center: Search All Products https://msc.fema.gov/portal/advanceSearch Federal Emergency Management AgencyFederal Insurance and Mitigation Administration(202) 646-2500500 C Street SWWashingtonDC20472USwww.msc.fema.govFlorida202604092026FEMA Flood Hazard ZoneNFIPinlandWatersDigital Flood Insurance Rate MapRiverine floodingSpecial Flood Hazard AreaFlood Insurance Rate MapFLOODSFHADFIRM DatabaseDFIRMFEMAenvironmentFLOOD HAZARDFloodwayFIRMISO 19115 Topic CategoryinlandWatersFEMA Flood Hazard ZoneNFIPinlandWatersFloridainlandWatersDigital Flood Insurance Rate MapRiverine floodingSpecial Flood Hazard AreaFlood Insurance Rate MapFLOODSFHADFIRM DatabaseDFIRMFEMAenvironmentFLOOD HAZARDFloodwayFIRMFEMA NFHL Product ID: NFHL_12_20260409Latest Study Effective Date: 11/14/2025Latest LOMR Effective Date: 04/10/2026The 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.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. The hardcopy FIRM and FIRM Database and the accompanying FIS are the official designation of SFHAs and Base Flood Elevations (BFEs) for the NFIP. For the purposes of the NFIP, changes to the flood risk information published by FEMA may only be performed by FEMA and through the mechanisms established in the NFIP regulations (44 CFR Parts 59-78). These digital data are produced in conjunction with the hardcopy FIRMs and generally match the hardcopy map exactly. Acknowledgement of FEMA would be appreciated in products derived from these data.publication date2001-06-06T00:00:002026-04-09T00:00:00-87.42904-79.87225124.49281530.983191State of FloridaThe 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 FIRM Database presents the flood risk information depicted on the FIRM in a digital format suitable for use in electronic mapping applications. The FIRM Database serves to archive the information collected during the Flood Risk Project. -------------------------------------------------------------------------------- What Is an LFD? A Letter of Final Determination (LFD) is a letter the Federal Emergency Management Agency (FEMA) sends to the Chief Executive Officer of a community stating that a new or updated Flood Insurance Rate Map (FIRM) or Digital Flood Insurance Rate Map (DFIRM) will become effective in 6 months. The letter also notifies each affected flood prone community participating in the National Flood Insurance Program (NFIP) that it must adopt a compliant floodplain management ordinance by the map effective date to remain participants in good standing in the NFIP. DFIRM [S_FIRM_Pan] Panel Summary Table of Effective Date -------------------------------------------------------------------------------- COUNTY - DFIRM ID - EFFECTIVE DATE - COUNT ALACHUA COUNTY (12001C) - 2006-06-16 (COUNT: 91) ALACHUA COUNTY (12001C) - 2018-11-02 (COUNT: 12) ALACHUA COUNTY (12001C) - 2021-09-24 (COUNT: 9) BAKER COUNTY (12003C) - 2008-06-17 (COUNT: 75) BAY COUNTY (12005C) - 2009-06-02 (COUNT: 22) BAY COUNTY (12005C) - 2024-10-24 (COUNT: 147) BRADFORD COUNTY (12007C) - 2012-05-02 (COUNT: 23) BRADFORD COUNTY (12007C) - 2018-11-02 (COUNT: 16) BREVARD COUNTY (12009C) - 2014-03-17 (COUNT: 59) BREVARD COUNTY (12009C) - 2021-01-29 (COUNT: 90) BROWARD COUNTY (12011C) - 2014-08-18 (COUNT: 36) BROWARD COUNTY (12011C) - 2024-07-31 (COUNT: 67) CALHOUN COUNTY (12013C) - 2013-06-18 (COUNT: 35) CALHOUN COUNTY (12013C) - 2025-11-14 (COUNT: 27) CHARLOTTE COUNTY (12015C) - 2003-05-05 (COUNT: 5) CHARLOTTE COUNTY (12015C) - 2022-12-15 (COUNT: 118) CITRUS COUNTY (12017C) - 2014-09-26 (COUNT: 108) CITRUS COUNTY (12017C) - 2021-01-15 (COUNT: 46) CLAY COUNTY (12019C) - 2014-03-17 (COUNT: 60) COLLIER COUNTY (12021C) - 2012-05-16 (COUNT: 74) COLLIER COUNTY (12021C) - 2024-02-08 (COUNT: 82) COLUMBIA COUNTY (12023C) - 2009-02-04 (COUNT: 84) COLUMBIA COUNTY (12023C) - 2018-11-02 (COUNT: 35) DESOTO COUNTY (12027C) - 2013-11-06 (COUNT: 78) DESOTO COUNTY (12027C) - 2021-10-07 (COUNT: 10) DIXIE COUNTY (12029C) - 2006-09-29 (COUNT: 29) DIXIE COUNTY (12029C) - 2018-04-18 (COUNT: 26) DIXIE COUNTY (12029C) - 2019-01-18 (COUNT: 80) DIXIE COUNTY (12029C) - 9999-09-09 (COUNT: 1) DUVAL COUNTY (12031C) - 2013-06-03 (COUNT: 76) DUVAL COUNTY (12031C) - 2018-11-02 (COUNT: 104) ESCAMBIA COUNTY (12033C) - 2025-08-19 (COUNT: 111) FLAGLER COUNTY (12035C) - 2018-06-06 (COUNT: 67) FRANKLIN COUNTY (12037C) - 2014-02-05 (COUNT: 52) FRANKLIN COUNTY (12037C) - 2024-10-10 (COUNT: 7) GADSDEN COUNTY (12039C) - 2009-02-04 (COUNT: 87) GILCHRIST COUNTY (12041C) - 2006-09-29 (COUNT: 45) GILCHRIST COUNTY (12041C) - 2018-01-19 (COUNT: 28) GLADES COUNTY (12043C) - 2014-09-26 (COUNT: 39) GLADES COUNTY (12043C) - 2020-03-06 (COUNT: 37) GLADES COUNTY (12043C) - 2022-03-22 (COUNT: 9) GULF COUNTY (12045C) - 2021-03-09 (COUNT: 93) HAMILTON COUNTY (12047C) - 2010-06-04 (COUNT: 33) HAMILTON COUNTY (12047C) - 2018-08-28 (COUNT: 4) HAMILTON COUNTY (12047C) - 2020-09-04 (COUNT: 21) HAMILTON COUNTY (12047C) - 2025-04-23 (COUNT: 9) HARDEE COUNTY (12049C) - 2013-11-06 (COUNT: 96) HENDRY COUNTY (12051C) - 2015-07-06 (COUNT: 45) HENDRY COUNTY (12051C) - 2020-05-15 (COUNT: 15) HERNANDO COUNTY (12053C) - 2012-02-02 (COUNT: 115) HERNANDO COUNTY (12053C) - 2021-01-15 (COUNT: 36) HIGHLANDS COUNTY (12055C) - 2015-11-18 (COUNT: 159) HILLSBOROUGH COUNTY (12057C) - 2008-08-28 (COUNT: 143) HILLSBOROUGH COUNTY (12057C) - 2013-09-27 (COUNT: 1) HILLSBOROUGH COUNTY (12057C) - 2021-10-07 (COUNT: 99) HOLMES COUNTY (12059C) - 2010-12-17 (COUNT: 44) INDIAN RIVER COUNTY (12061C) - 2012-12-04 (COUNT: 22) INDIAN RIVER COUNTY (12061C) - 2023-01-26 (COUNT: 54) JACKSON COUNTY (12063C) - 2010-12-17 (COUNT: 57) JACKSON COUNTY (12063C) - 2025-11-14 (COUNT: 13) JEFFERSON COUNTY (12065C) - 2014-02-05 (COUNT: 9) JEFFERSON COUNTY (12065C) - 2025-04-23 (COUNT: 12) LAFAYETTE COUNTY (12067C) - 2006-09-29 (COUNT: 56) LAFAYETTE COUNTY (12067C) - 2017-10-05 (COUNT: 18) LAKE COUNTY (12069C) - 2012-12-18 (COUNT: 94) LEE COUNTY (12071C) - 2008-08-28 (COUNT: 39) LEE COUNTY (12071C) - 2018-12-07 (COUNT: 7) LEE COUNTY (12071C) - 2022-11-17 (COUNT: 157) LEON COUNTY (12073C) - 2009-08-18 (COUNT: 86) LEVY COUNTY (12075C) - 2012-11-02 (COUNT: 55) LEVY COUNTY (12075C) - 2017-02-03 (COUNT: 5) LEVY COUNTY (12075C) - 2019-01-18 (COUNT: 50) LEVY COUNTY (12075C) - 2022-01-28 (COUNT: 20) LIBERTY COUNTY (12077C) - 2013-06-18 (COUNT: 16) LIBERTY COUNTY (12077C) - 2022-08-02 (COUNT: 10) MADISON COUNTY (12079C) - 2010-05-03 (COUNT: 26) MADISON COUNTY (12079C) - 2017-02-03 (COUNT: 5) MADISON COUNTY (12079C) - 2020-09-04 (COUNT: 31) MADISON COUNTY (12079C) - 2025-04-23 (COUNT: 47) MANATEE COUNTY (12081C) - 2014-03-17 (COUNT: 75) MANATEE COUNTY (12081C) - 2021-08-10 (COUNT: 78) MARION COUNTY (12083C) - 2008-08-28 (COUNT: 148) MARION COUNTY (12083C) - 2017-04-19 (COUNT: 64) MARION COUNTY (12083C) - 2017-04-19 (COUNT: 64) MARION COUNTY (12083C) - Null (COUNT: 6) MARTIN COUNTY (12085C) - 2020-02-19 (COUNT: 46) MIAMI-DADE COUNTY (12086C) - 2009-09-11 (COUNT: 251) MONROE COUNTY (12087C) - 2005-02-18 (COUNT: 183) NASSAU COUNTY (12089C) - 2010-12-17 (COUNT: 62) NASSAU COUNTY (12089C) - 2017-08-02 (COUNT: 61) OKALOOSA COUNTY (12091C) - 2002-12-06 (COUNT: 2) OKALOOSA COUNTY (12091C) - 2021-03-09 (COUNT: 72) OKEECHOBEE COUNTY (12093C) - 2015-07-16 (COUNT: 42) ORANGE COUNTY (12095C) - 2009-09-25 (COUNT: 44) ORANGE COUNTY (12095C) - 2018-06-20 (COUNT: 6) ORANGE COUNTY (12095C) - 2021-09-24 (COUNT: 12) OSCEOLA COUNTY (12097C) - 2013-06-18 (COUNT: 66) PALM BEACH COUNTY (12099C) - 2017-10-05 (COUNT: 155) PALM BEACH COUNTY (12099C) - 2024-12-20 (COUNT: 60) PASCO COUNTY (12101C) - 2014-09-26 (COUNT: 145) PASCO COUNTY (12101C) - 2020-06-05 (COUNT: 31) PINELLAS COUNTY (12103C) - 2003-09-03 (COUNT: 26) PINELLAS COUNTY (12103C) - 2009-08-18 (COUNT: 1) PINELLAS COUNTY (12103C) - 2021-08-24 (COUNT: 108) POLK COUNTY (12105C) - 2012-09-28 (COUNT: 16) POLK COUNTY (12105C) - 2016-12-22 (COUNT: 108) PUTNAM COUNTY (12107C) - 2012-02-02 (COUNT: 105) ST. JOHNS COUNTY (12109C) - 2018-12-07 (COUNT: 128) ST. LUCIE COUNTY (12111C) - 2012-02-16 (COUNT: 38) ST. LUCIE COUNTY (12111C) - 2020-02-19 (COUNT: 43) SANTA ROSA COUNTY (12113C) - 2006-12-19 (COUNT: 40) SANTA ROSA COUNTY (12113C) - 2021-11-19 (COUNT: 103) SARASOTA COUNTY (12115C) - 2016-11-04 (COUNT: 61) SARASOTA COUNTY (12115C) - 2024-03-27 (COUNT: 90) SEMINOLE COUNTY (12117C) - 2007-09-28 (COUNT: 38) SUMTER COUNTY (12119C) - 2013-09-27 (COUNT: 115) SUMTER COUNTY (12119C) - 2020-06-05 (COUNT: 40) SUWANNEE COUNTY (12121C) - 2007-09-28 (COUNT: 113) SUWANNEE COUNTY (12121C) - 2013-04-16 (COUNT: 12) SUWANNEE COUNTY (12121C) - 2017-02-03 (COUNT: 10) SUWANNEE COUNTY (12121C) - 2018-08-28 (COUNT: 3) TAYLOR COUNTY (12123C) - 2009-05-04 (COUNT: 50) TAYLOR COUNTY (12123C) - 2019-02-01 (COUNT: 79) UNION COUNTY (12125C) - 2009-02-04 (COUNT: 34) UNION COUNTY (12125C) - 2018-11-02 (COUNT: 8) VOLUSIA COUNTY (12127C) - 2014-02-19 (COUNT: 59) VOLUSIA COUNTY (12127C) - 2017-09-29 (COUNT: 66) WAKULLA COUNTY (12129C) - 2014-09-26 (COUNT: 27) WAKULLA COUNTY (12129C) - 2022-08-02 (COUNT: 2) WALTON COUNTY (12131C) - 2010-09-29 (COUNT: 95) WALTON COUNTY (12131C) - 2020-12-30 (COUNT: 63) WASHINGTON COUNTY (12133C) - 2011-07-04 (COUNT: 37) Please Note: Previously this table was created by adding the Study_info table's CNTY_NM field to the S_FIRM_Pan field via a table join based on DFIRM_ID. EFF_DATE_SUM = !DFIRM_ID! + " " + str(!EFF_DATE!) + " " + !COUNTY! !FIRST_COUNTY! + " (" + !FIRST_DFIRM_ID! + ") - " + !FIRST_EFF_DATE!.strftime('%Y-%m-%d') + " (COUNT: " + str(!FREQUENCY!) + ")" -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- ** What is a "100-year flood" and how is it different from a "1-percent-annual-chance flood" or a "base flood?" ** The term "100-year flood" is misleading. It is not the flood that will occur once every 100 years. Rather, it is the flood that has a 1-percent chance of being equaled or exceeded each year. Thus, the 100-year flood could occur more than once in a relatively short period of time or even within the same month. Because this term is misleading, FEMA has also defined it as the "1-percent-annual-chance flood." The "1-percent-annual-chance flood" is the term that is now used by most federal and state agencies and by the National Flood Insurance Program. SOURCE: https://www.fema.gov/frequently-asked-questions/insurance-professionals-lenders-frequently-asked-questions -------------------------------------------------------------------------------- ** 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 Source: https://www.fema.gov/sites/default/files/2020-02/FIRM_Database_Technical_Reference_Feb_2019.pdf --------------------------------------------------------------------------------Microsoft Windows 10 Version 10.0 (Build 26200) ; Esri ArcGIS 13.5.3.573661-87.639377-79.86028531.04276424.471771VariesWhen 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 NFHL reflects 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. Generally, regulatory water surface elevations and/or regulatory floodways are published only for developed or developing areas of communities. For areas where little or no development is expected to occur, FEMA may generate flood risk data without published water surface elevations. Typically, only drainage areas that are greater than one square mile and with an average of one foot of flood depth or greater are studied. Note: The NFHL reflects the most current information available when the distribution data set was created. Currently, not all areas of a State or Territory have effective FIRM Database data. As a result, users may need to refer to the effective FIRM for effective flood hazard information.The NFHL consists of vector files and associated attributes produced in conjunction with the hardcopy FEMA FIRM. The published effective FIRM and FIRM Database 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 Standards for Flood Risk Analysis and Mapping. 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 the individual FIRM Database components of the NFHL was also performed.The NFHL consists of vector files and associated attributes produced in conjunction with the hardcopy FEMA FIRM. The published effective FIRM and FIRM Database 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 Standards for Flood Risk Analysis and Mapping. The reliability of the floodplain boundary delineation is quantified by comparing the computed flood elevation to the ground elevation at the mapped floodplain boundary. The tolerance for how precisely the flood elevation and the ground elevation must match varies based on the flood risk class, which is a function of population, population density, and/or anticipated growth in floodplain areas. A horizontal accuracy of +/- 38 feet is used to determine the compliance with the vertical tolerances defined for each risk class. The range of differences between the ground elevation (defined from the topographic data used for the Flood Risk Project) and the computed flood elevation is between +/- 1.0 foot at the 95% confidence interval for areas with high population within the floodplain and/or high anticipated growth and Special Flood Hazard Areas (SFHAs) with high flood risk to +/- one-half the contour interval at the 85% confidence interval for areas with low population and densities within the floodplain and small or no anticipated growth and SFHAs with low flood risk. Independent quality control testing of the individual FIRM Database components of the NFHL was also performed.Spatial and Attribute InformationThe NFHL dataset is a compilation of effective FIRM Databases (a collection of the digital data that are used in GIS systems for creating new Flood Insurance Rate Maps) and Letters of Map Change (Letters of Map Amendment and Letters of Map Revision only) that create a seamless GIS data layer for a State or Territory. It is updated on a monthly basis. The FIRM Databases are compiled in conjunction with the hardcopy FIRMs and the final FIS reports. The specifics of the hydrologic and hydraulic analyses performed are detailed in the FIS reports available for each jurisdiction. 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 FIRM publication and checked for accuracy and compliance with FEMA standards. As new FIRM Databases are received the individual FIRM layers are sewn into the nationwide layers of the NFHL. LOMRs for the FIRM Databases in the NFHL are cut directly into the NFHL data layers as they are being produced and finalized.2026-04-09T00:00:00FEMAThe GeoPlan Center downloaded the Statewide National Flood Hazard Layer from the following FEMA website on April 13th , 2026. FEMA Flood Map Service Center https://msc.fema.gov/portal Search All Products https://msc.fema.gov/portal/advanceSearch Choose one of the three search options below and optionally enter a posting date range. https://msc.fema.gov/portal/advanceSearch State -FLORIDA County - ALACHUA Community - ALACHUA Search Effective Products NFHL Data-State(1) Product ID Product ID: NFHL_12_20260409 Latest Study Effective Date: 11/14/2025 Latest LOMR Effective Date: 04/10/2026 DL:Download Product NFHL_12_20260409 NFHL_12_20260409.zip NFHL_12_20260409.gdb Feature Layer: S_Fld_Haz_Ar The S_Fld_Haz_Ar was originally in the following projection: GCS_North_American_1983 WKID: 4269 Authority: EPSG Angular Unit: Degree (0.0174532925199433) Prime Meridian: Greenwich (0.0) Datum: D_North_American_1983 Spheroid: GRS_1980 Semimajor Axis: 6378137.0 Semiminor Axis: 6356752.314140356 Inverse Flattening: 298.257222101 The dataset was projected to the FGDL Albers HARN projection using the following Transformation: NAD_1983_To_HARN_Florida The dataset was renamed to dfirm_fldhaz_apr26. Next the following fields were added and populated: COUNTY = County Name UPDATE_DATE = FEMA status Update date based on the field DBREV_DT in the Study_Info table. PRODUCT_ID = "NFHL_12_20260409" NOTES = Original Vertex Count Before Feature Was Diced. VERTCNT = Total Number of Vertices. FLD_ZONE_ZONE_SUBTY = !FLD_ZONE! + " - " + !ZONE SUBTY! FLOODPLAIN = See Crosswalk Table Below RISK_LEVEL = See Crosswalk Table Below FHZ_LABEL = See Crosswalk Table 2 Below DESCRIPT = [SFHA_TF] field Description [SFHA_TF] = "T" : INSIDE SPECIAL FLOOD HAZARD AREA [SFHA_TF] = "F" : OUTSIDE SPECIAL FLOOD HAZARD AREA FGDLAQDATE = "4/13/2026" -Upper case all text fields before starting Crosswalk Process Steps below. --------------------------- Crosswalk Process Steps: Using Previous Version of FGDL Dataset, create a text combination field called FLD_ZONE_SUBTY containing the FLD_ZONE + ZONE SUBTY fields: !FLD_ZONE! + " - " + !ZONE SUBTY! - Where !ZONE SUBTY! is Null or Blank, just calculate field to !FLD_ZONE! Next Summarized on that newly added field with the following: - FIRST_FLOODPLAIN - FIRST_RISK_LEVEL - FIRST_FHZ_LABEL name table: dfirm_fldhaz_olddate_StatisticsFldZoneSub Using the New Version of the Dataset, create a text combination field called FLD_ZONE_SUBTY containing the FLD_ZONE + ZONE SUBTY fields: !FLD_ZONE! + " - " + !ZONE SUBTY! - Where !ZONE SUBTY! is Null or Blank, just calculate field to !FLD_ZONE! Join the dfirm_fldhaz_olddate_StatisticsFldZoneSub table to the new dataset based on the field: FLD_ZONE_SUBTY. Calculate the following fields in the new dataset based on the information in the join table: FLOODPLAIN, RISK_LEVEL, and FHZ_LABEL. * Note: Do Not Calculate DESCRIPT from this summary and table join, Only use the SFHA_TF field to calculate the DESCRIPT field. * Crosswalk Table Information and Crosswalk Table 2 Information are additional information and are not needed to complete the update of this dataset. Advance to next step below (Repair Geometry...) --------------------------- Crosswalk Table Information 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 OPEN WATER OPEN WATER OPEN WATER A second calculation was done for the following where FLD_ZONE = X and field ZONE_SUBTY combinations existed, see below. 0.2 PCT* MODERATE RISK AREAS 500-YEAR FLOODPLAIN 1 PCT DEPTH LESS THAN 1 FOOT MODERATE RISK AREAS 500-YEAR FLOODPLAIN AREA WITH REDUCED FLOOD RISK DUE TO LEVEE MODERATE RISK AREAS 500-YEAR FLOODPLAIN Crosswalk Table 2 Information This crosswalk table was used to populate the FHZ_LABEL field. Text description of flood zones for map legends based on the FLD_ZONE and ZONE_SUBTY fields Calculated Zone Descriptions for field FLD_ZONE = A, AE, AH, AO, AR, A99, V and VE as 1% ANNUAL CHANCE FLOOD HAZARD Calculated Zone Descriptions for field FLD_ZONE = AREA NOT INCLUDED as AREA NOT INCLUDED Calculated Zone Descriptions for field FLD_ZONE = D as AREA OF UNDETERMINED FLOOD HAZARD Calculated Zone Descriptions for field FLD_ZONE = OPEN WATER as OPEN WATER Next Calculated Zone Descriptions for field ZONE_SUBTY = 0.2 PCT ANNUAL CHANCE FLOOD HAZARD as 0.2% ANNUAL CHANCE FLOOD HAZARD 0.2 PCT ANNUAL CHANCE FLOOD HAZARD CONTAINED IN CHANNEL as 0.2% ANNUAL CHANCE FLOOD HAZARD 1 PCT DEPTH LESS THAN 1 FOOT as 0.2% ANNUAL CHANCE FLOOD HAZARD AREA OF MINIMAL FLOOD HAZARD as AREA OF MINIMAL FLOOD HAZARD AREA WITH REDUCED FLOOD RISK DUE TO LEVEE as AREA WITH REDUCED RISK DUE TO LEVEE FLOODWAY as REGULATORY FLOODWAY RIVERINE FLOODWAY SHOWN IN COASTAL ZONE as REGULATORY FLOODWAY --------------------------- - Ran Repair Geometry 3x. - It was noted that sliver polygons existed. 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. - Next Summarized on the field FLD_AR_ID to search for Duplicate data issues. - Next Deleted the following 3 features due to spatial errors: * 12059C_235984 (Duplicate Polygon), * 12111C_1676 (Zero Area), * 12097C_1170 (Negative Area). - It was noted that over 100 features had vertex counts greater than 350,000. Features with large vertex counts are known to cause database analysis crashes and errors. The ArcGIS Dice Tool subdivides a feature into smaller features based on a specified vertex limit. This tool is intended as a way to subdivide extremely large features that cause issues with drawing, analysis, editing, and/or performance but are difficult to split up with standard editing and geoprocessing tools. This tool should not be used in any cases other than those where tools are failing to complete successfully due to the size of features. Source: https://desktop.arcgis.com/en/arcmap/latest/tools/data-management-toolbox/dice.htm -The features were subdivided using the ArcGIS Dice Tool with a vertex limit of 350,000. - Ran Repair Geometry 3x. - Checked for duplicate records, none found. Previous duplicate records process steps can be found in the 2022 metadata version. * Please Note: During the QAQC process, it was determined that 16 records were still missing in the Sarasota area (absence first noted in NFHL_12_20260129 that was not processed in Feb due to this issue). Because these missing records still exist and cover a very large area, the following update has been made. Appended the missing records from the previous version; these records have their original December 2024 PRODUCT_ID (NFHL_12_20241220) number and information. It was determined that these records were associated with a polygon that had previously had to be diced; the original polygon size might have been a factor in its absence in this 2026 version. Updated Metadata2026-04-13T00:00:00GeoPlanKate NorrisUniversity of Florida GeoPlan CenterGeospatial Data Manager & Senior GIS Specialistwww.fgdl.org131 Jonathan and Melanie Antevy Hall | PO Box 115706GainesvilleFL32611-5706USdata@fgdl.orgKate NorrisKate NorrisCreated using the con command where conditional raster is dfirm_100 (dfirm_100 is true and dfirm_500 is false). reclass: No data to 0; Add DESCRIPT: (0: OUTSIDE FLOODPLAIN; 1: 100 YEAR FLOODPLAIN; 2: 500 YEAR FLOODPLAIN).2026-05-13T00:00:00external786dcbb2ef2a12674391f92d21d5616b2e69f87eUniversity of Florida GeoPlan CenterTrueUniversity of Florida GeoPlan CenterThis data is provided 'as is'. GeoPlan relied on the integrity of the original data layer's topology.This data is provided 'as is' by GeoPlan and is complete to our knowledge.GeoPlan relied on the integrity of the attribute information within the original data.This data is provided 'as is' and its horizontal positional accuracy has not been verified by GeoPlan.This data is provided 'as is' and its vertical positional accuracy has not been verified by GeoPlan.0021052653.337400 58516.34790052653.337400 781596.347900795133.337400 781596.347900795133.337400 58516.347900423893.337400 420056.3479007424810.0000007230810.000000EPSG6.12(9.2.0)DFIRM_FLOODPLAINS_APR26DFIRM_FLOODPLAINS_APR26FEMATable3OIDOIDOID400Internal feature number.EsriSequential unique whole numbers that are automatically generated.ValueValueInteger10100Value based on 100 or 500 year floodplain. 0 = OUTSIDE FLOODPLAIN. 1 = 100 YEAR FLOODPLAIN 2 = 500 YEAR FLOODPLAINGeoPlanCountCountDouble1900Count of cells with same valueGeoPlanDESCRIPTText description based on valueGeoPlanDESCRIPTString25400The 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. Table containing attribute information associated with the data set. FEMA FIRM Database Technical Reference https://www.fema.gov/sites/default/files/2020-02/FIRM_Database_Technical_Reference_Feb_2019.pdfAppendix 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 Attribute Definition Information can be found in the following reference: FEMA FIRM Database Technical Reference https://www.fema.gov/sites/default/files/2020-02/FIRM_Database_Technical_Reference_Feb_2019.pdfBand_12.0000000.0000008