20241223121058001.0FALSEDFIRM_FLDHAZ_DEC24ArcSDE Connection52663.337400795131.68130056776.347900781589.2863001002ProjectedGCS_North_American_1983_HARNLinear Unit: Meter (1.000000)NAD_1983_HARN_Florida_GDL_Albers<ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.3.0'><WKT>PROJCS["NAD_1983_HARN_Florida_GDL_Albers",GEOGCS["GCS_North_American_1983_HARN",DATUM["D_North_American_1983_HARN",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Albers"],PARAMETER["False_Easting",400000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-84.0],PARAMETER["Standard_Parallel_1",24.0],PARAMETER["Standard_Parallel_2",31.5],PARAMETER["Latitude_Of_Origin",24.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3087]]</WKT><XOrigin>-19550100</XOrigin><YOrigin>-7526400</YOrigin><XYScale>10000</XYScale><ZOrigin>0</ZOrigin><ZScale>1</ZScale><MOrigin>0</MOrigin><MScale>1</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>3087</WKID><LatestWKID>3087</LatestWKID></ProjectedCoordinateSystem>20250122211408002025012221140800500005000FGDC5B47097C-9E10-4611-89BB-250DD71CF3BBdatasetFlood Map Service CenterFederal Emergency Management AgencyFederal Insurance and Mitigation Administration1-800-358-9616500 C Street SWWashingtonDC20472USwww.msc.fema.gov20241220ArcGIS Metadata1.00.000Florida Geographic Data Library (FGDL)431 Jonathan and Melanie Antevy Hall | PO Box 115706Web site: http://www.fgdl.orgGainesvilleFL32611-5706USNoneDOWNLOADABLE DATAhttps://www.fgdl.org/Enterprise Geodatabase Feature ClassFlood Hazard Zones of the Digital Flood Insurance Rate Map (DFIRM) in the State of Florida - December 20242024-12-20T00:00:00NFHL Florida Data Product ID: NFHL_12_20241220, ESRI FGDBFederal Emergency Management Agency500 C Street SW, Washington, DC, 20472, USFederal Emergency Management AgencyState of FloridaNational Flood Hazard Layer (NFHL)<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This dataset contains information about the flood hazards within the study area. 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). There is one polygon for each contiguous flood zone designated. This information is required for all draft Digital Flood Insurance Rate Maps. 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. FEMA NFHL Product ID: NFHL_12_20241220, Latest Study Effective Date: 12/20/2024, Latest LOMR Effective Date: 11/12/2024. This dataset is an update to the DFIRM_FLDHAZ_APR24 layer.</SPAN></P></DIV></DIV></DIV> This layer is the parent for Special Flood Hazard Area, which uses the following selection: DFIRM_FLDHAZ.SFHA_TF = 'T'. This layer is the parent for Special Flood Hazard Areas, which uses the following selection: DFIRM_FLDHAZ.FLD_ZONE = 'A' OR FLD_ZONE = 'AE' OR FLD_ZONE = 'V'. This layer is the parent for Other Areas of Flood Hazard, which uses the following selection: DFIRM_FLDHAZ.FLD_ZONE = 'X'.This dataset contains information about the flood hazards within the study area. 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). 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. FEMA NFHL Product ID: NFHL_12_20241220, Latest Study Effective Date: 12/20/2024, Latest LOMR Effective Date: 11/12/2024. This dataset is an update to the DFIRM_FLDHAZ_APR24 layer.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.govFlorida202412202024FEMA 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_20241220Latest Study Effective Date: 12/20/2024Latest LOMR Effective Date: 11/12/2024The 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.<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>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.</SPAN></P></DIV></DIV></DIV>NFHL Data-State (FL)2024-04-20T00:00:00Federal Emergency Management AgencyFederal Emergency Management Agency500 C Street SW, Washington, DC, 20472, USvector digital dataFEMA Flood Map Service Center https://msc.fema.gov/portal/advanceSearch FEMA FIRM Database Technical Reference (available in the FEMA Library at https://www.fema.gov/media-library/assets/documents/34519).publication date2001-06-06T00:00:002024-12-20T00:00:00-87.42904-79.87225124.49281530.983191State 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.
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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
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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: 62)
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) - 2006-09-29 (COUNT: 104)
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: 41)
HAMILTON COUNTY (12047C) - 2018-08-28 (COUNT: 5)
HAMILTON COUNTY (12047C) - 2020-09-04 (COUNT: 21)
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: 70)
JEFFERSON COUNTY (12065C) - 2014-02-05 (COUNT: 21)
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: 72)
MADISON COUNTY (12079C) - 2017-02-03 (COUNT: 5)
MADISON COUNTY (12079C) - 2020-09-04 (COUNT: 32)
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) - Null (COUNT: 6)
MARTIN COUNTY (12085C) - 2015-03-16 (COUNT: 32)
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!) + ")"
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** 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
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** 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 19045) ; Esri ArcGIS 13.3.0.526361-87.639270-79.86030431.04270024.456078VariesWhen 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.2024-12-20T00:00:00FEMAThe GeoPlan Center downloaded the Statewide National Flood Hazard Layer from the following FEMA website on December 23rd 2024.
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_20241220
Latest Study Effective Date: 12/20/2024
Latest LOMR Effective Date: 11/12/2024
DL:Download Product NFHL_12_20241220
NFHL_12_20241220.zip
NFHL_12_20241220.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_dec24.
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_20241220"
NOTES = Original Vertex Count Before Feature Was Diced.
VERTCNT = Total Number of Vertices.
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 = "12/23/2024"
-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.
Updated Metadata2024-12-23T00:00:00GeoPlanKate NorrisUniversity of Florida GeoPlan CenterGeospatial Data Manager & Senior GIS Specialistwww.fgdl.org131 Jonathan and Melanie Antevy Hall | PO Box 115706GainesvilleFL32611-5706USdata@fgdl.orgKate NorrisKate NorrisThis 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.0572371EPSG6.12(9.2.0)DFIRM_FLDHAZ_DEC24DFIRM_FLDHAZ_DEC24FEMAFeature Class572371OBJECTIDInternal feature number.EsriSequential unique whole numbers that are automatically generated.OBJECTIDOID4100ShapeSHAPEGeometry800Feature geometry.EsriCoordinates defining the features.DFIRM_IDFlood Risk Project Identifier. For a single-jurisdiction flood risk project, the value is composed of the 2-digit state FIPS code and the 4-digit FEMA CID code (e.g., 480001). For a countywide flood risk project, the value is composed of the 2-digit state FIPS code, the 3-digit county FIPS code, and the letter "C" (e.g., 48107C). Within each FIRM database, the DFIRM_ID value is identical.FEMAUnknownDFIRM_IDString600VERSION_IDVersion Identifier. Identifies the product version and relates the feature to standards according to which it was created.FEMA1.1.1.0UnknownProducer defined2.3.3.2UnknownProducer definedVERSION_IDString1100FLD_AR_IDPrimary key for table lookup. Assigned by table creator.FEMAUnknownFLD_AR_IDString3200STUDY_TYPStudy Type. This describes the type of flood risk project performed for flood hazard identification. Acceptable values for this field are listed in the D_Study_Typ table. "NP" = Not Populated. Please Note: For Shaded X the value should be SFHAS WITH HIGH FLOOD RISK, and for Unshaded X the value should be NP (Domain Table Technical Reference pg 49).FEMANPUnknownProducer definedSFHAS WITH HIGH FLOOD RISKUnknownProducer definedSFHAS WITH LOW FLOOD RISKUnknownProducer definedSTUDY_TYPString3800FLD_ZONEFlood 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.FEMA: https://www.fema.gov/frequently-asked-questions/insurance-professionals-lenders-frequently-asked-questionsAZone A is the flood insurance rate zone used for 1-percent-annual-chance (base flood) floodplains that are determined for the Flood Insurance Study (FIS) by approximate methods of analysis. Because detailed hydraulic analyses are not performed for such areas, no Base Flood Elevations (BFEs) or depths are shown in this zone. Mandatory flood insurance purchase requirements apply.Producer definedAEZone AE is the flood insurance rate zone that corresponds to the 1% annual chance floodplains. Base flood elevations derived from the hydraulic analyses are shown within this zone.Producer definedAHZone AH is the flood insurance rate zone used for 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. BFEs derived from detailed hydraulic analyses are shown at selected intervals within this zone. Mandatory flood insurance purchase requirements apply.Producer definedAOZone AO are areas of sheet-flow shallow flooding where the potential runup is less than 3.0 feet above an overtopped barrier crest (R<3.0 feet). The sheet flow in these areas will either flow into another flooding source (AE zone), result in ponding (AH zone) or deteriorate because of ground friction and energy losses and merge into the X zone. AO areas are designated with 1-, 2-, or 3-foot depths of flooding.Producer definedAREA NOT INCLUDEDUnknownProducer definedDThe 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. Flood insurance is optional and available and the flood insurance rates for properties in Zone D are commensurate with the uncertainty of the flood risk.Producer definedOPEN WATERUnknownProducer definedVZone V is the flood insurance rate zone that corresponds to the 1% annual chance coastal floodplains that have additional hazards associated with storm waves. Base flood elevations are not shown within this zone.Producer definedVEZone VE are coastal high hazard areas where wave action and/or high-velocity water can cause structural damage during the base flood. They are subdivided into elevation zones with BFEs assigned. VE zones are identified using one or more of the following criteria for the base flood conditions: [1] The wave runup zone occurs where the (eroded) ground profile is 3.0 feet or more below the 2-percent wave runup elevation. [2] The wave overtopping splash zone is the area landward of the crest of an overtopped barrier, in cases where the potential 2-percent wave runup exceeds the barrier crest elevation by 3.0 feet or more(R>3.0 feet). (See Subsection D.2.8.2.). [3] The breaking wave height zone occurs where 3-foot or greater wave heights could occur (this is the area where the wave crest profile is 2.1 feet or more above the total stillwater level). [4] The primary frontal dune zone, as defined in 44 CFR Section 59.1 of the NFIP regulations. For the Pacific Coast only: [5] The high-velocity flow zone is landward of the overtopping splash zone (or area on a sloping beach or other shore type), where the product of depth of flow times the flood velocity squared (hv2) is greater than or equal to 200 ft3/sec2.Producer definedXZone X is classified as Shaded or Unshaded. (1)Shaded Zone X: Areas of 0.2% annual chance flood hazards and areas of 1% annual chance flood hazards with average depths of less than 1 foot or with drainage areas less than 1 square mile. (2)Future Conditions: 1% Annual Chance Flood Hazard - Zone X: The flood insurance rate zone that corresponds to the 1% annual chance floodplains that are determined based on future-conditions hydrology. No base flood elevations or flood depths are shown within this zone. (3)Area with Reduced Flood Risk due to Levee: Areas where an accredited levee, dike, or other flood control structure has reduced the flood risk from the 1% annual chance flood. See Notes to Users for important information. (4)Area with Flood Risk due to Levee: Areas where a non-accredited levee, dike, or other flood control structure is shown as providing protection to less than the 1% annual chance flood. (5)Unshaded Zone X: Areas of minimal flood hazard.Producer definedFLD_ZONEString1700ZONE_SUBTYFlood Zone Subtype. This field captures additional information about the flood zones not related to insurance rating purposes. For example, insurance rate zone Shaded X could have "PROTECTED BY LEVEE" or "0.2 PCT ANNUAL CHANCE FLOOD HAZARD CONTAINED IN STRUCTURE." Types of floodways are also stored in this field. Floodways 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 floodways are specified as "FLOODWAY." 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_Subtype table.FEMA{Null Value / Empty Field Entry}UnknownProducer defined0.2 PCT ANNUAL CHANCE FLOOD HAZARDShaded Zone X: Areas of 0.2% annual chance flood hazards.Producer defined0.2 PCT ANNUAL CHANCE FLOOD HAZARD CONTAINED IN CHANNELShaded Zone X: Areas of 0.2% annual chance flood hazards.Producer definedZONE_SUBTYString76000.2 PCT ANNUAL CHANCE FLOOD HAZARD CONTAINED IN STRUCTUREShaded Zone X: Areas of 0.2% annual chance flood hazards.Producer defined0.2 PCT ANNUAL CHANCE FLOOD HAZARD IN COASTAL ZONEShaded Zone X: Areas of 0.2% annual chance flood hazards.Producer defined0.2 PCT ANNUAL CHANCE FLOOD HAZARD IN COMBINED RIVERINE AND COASTAL ZONEShaded Zone X: Areas of 0.2% annual chance flood hazards.Producer defined1 PCT DEPTH LESS THAN 1 FOOTShaded Zone X: 1% annual chance flood hazards with average depths of less than 1 foot. This zone is classified as being within the 500 year floodplain and not the 100 year floodplain because of the following: Flood zones AH and AO reference a base flood depth between 1 and 3 feet. This is in place of a Base Flood Elevation. An area that has a base flood depth below 1 foot is considered to be flood zone X, since the area affected by the 100 year flooding event would be too shallow or too small to identify on the Flood Insurance Rate Map. Please refer to the Shallow Flooding Analyses and Mapping technical document at https://www.fema.gov/media-library-data/1484865782763-4d150592d6eae9fdb5e2c2ab597928a6/Shallow_Flooding_Guidance_Nov_2016.pdf for more information on this classification.Producer definedAREA OF MINIMAL FLOOD HAZARDUnshaded Zone X: Areas of minimal flood hazard.Producer definedAREA WITH REDUCED FLOOD RISK DUE TO LEVEEArea with Reduced Flood Risk due to Levee: Areas where an accredited levee, dike, or other flood control structure has reduced the flood risk from the 1% annual chance flood.Producer definedCOASTAL FLOODPLAINUnknownProducer definedCOMBINED RIVERINE AND COASTAL FLOODPLAINUnknownProducer definedFLOODWAYUnknownProducer definedRIVERINE FLOODWAY IN COMBINED RIVERINE AND COASTAL ZONEUnknownProducer definedRIVERINE FLOODWAY SHOWN IN COASTAL ZONEUnknownProducer definedSFHA_TFSpecial 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.FEMAFFalseProducer definedTTrueProducer definedSFHA_TFString100STATIC_BFEStatic 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.FEMA-9999252.1STATIC_BFEDouble8388V_DATUMVertical 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.FEMA{Null Value / Empty Field Entry}UnknownProducer definedASVD02UnknownProducer definedNAVD88UnknownProducer definedNGVD29UnknownProducer definedNPUnknownProducer definedV_DATUMString1700DEPTHDepth 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.FEMA-99993DEPTHDouble8388LEN_UNITLength 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.FEMA{Null Value / Empty Field Entry}UnknownProducer definedCENTIMETERSUnknownProducer definedFEETUnknownProducer definedLEN_UNITString1600VELOCITYVelocity 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.FEMA-99990VELOCITYDouble8388VEL_UNITUnit 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.FEMA{Null Value / Empty Field Entry}UnknownProducer definedFEET / SECONDUnknownProducer definedVEL_UNITString2000AR_REVERTIf 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.FEMA{Null Value / Empty Field Entry}UnknownProducer definedAR_REVERTString1700AR_SUBTRVFlood Control Restoration Zones ? Zone AR Classification Zone Subtype. If this area is Zone AR in FLD_Zone field, this field would hold the zone subtype that area would revert to if the AR zone were removed. This field is only populated if the corresponding area is Zone AR. 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_Subtype_ table and must be one of the allowable subtypes for Zones AE, AO, AH, A, or X.FEMA{Null Value / Empty Field Entry}UnknownProducer definedAR_SUBTRVString5700BFE_REVERTIf 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.FEMA-9999-9999BFE_REVERTDouble8388DEP_REVERTIf 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.FEMA-9999-9999DEP_REVERTDouble8388DUAL_ZONEFlood Control Restoration Zones ? Dual Zone Classification. If the flood hazard areas shown on the effective FIRM shall be designated as ?dual? flood insurance rate zones (i.e., Zone AR/AE, Zone AR/AH, Zone AR/AO, Zone AR/A), this field will be coded as true. It should be false for any for AR Zones that revert to Shaded X. Acceptable values for this field are listed in the D_TrueFalse table. Dual zones (AR/AE) are flood zones with a risk of flooding from other water sources not protected by the flood protection system being restored. This means that despite the completion of a levee repair project, the area will continue to be in a high risk flood zone due to a flooding source other than the AR Zone source. In this situation, flood insurance purchase requirements apply.FEMA{Null Value / Empty Field Entry}UnknownProducer definedFUnknownProducer definedDUAL_ZONEString100SOURCE_CITSource 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.FEMAUnknownSOURCE_CITString2100GFIDGFIDString3600FEMA DFIRM GFID Number.FEMACOUNTYCOUNTYString2000CountyGeoPlanUPDATE_DATEUPDATE_DATEDate800FEMA status Update date based on the field DBREV_DT. The Study_Info table stores project wide information about the data contained in the FIRM Database such as the jurisdiction name, datum, and projection needed for the FIRM panel title blocks, FIRM legend and notes to user, FIS Report cover, and FIRM Index. The DBREV_DT field stores the date on which the FIRM Database was last updated. In the NFHL, this date will be either the effective date of the most recent LOMR or the effective study date, whichever is newer. For Flood Risk Projects, this is the effective date of the PMR or countywide study.GeoPlanPRODUCT_IDFEMA Flood Map Service Center Product ID. https://msc.fema.gov/portal/advanceSearchGeoPlanPRODUCT_IDString2000NOTESNotes on original vertex count for features that were Diced due to size.GeoPlanUnknownNOTESString5000VERTCNTFeature Vertex Count.GeoPlan4497819VERTCNTInteger4100FLOODPLAINFloodplain description based on FLD_ZONE field.GeoPlan100-YEAR FLOODPLAINThis is an area inundated by 100-year flooding.Producer defined500-YEAR FLOODPLAINThis is an area inundated by 500-year flooding.Producer definedOPEN WATERThis area is an open water body.Producer definedOUTSIDE FLOODPLAINThis is an area outside the 100 and 500-year flood plains.Producer definedUNDETERMINEDAreas 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.Producer definedFLOODPLAINString5000RISK_LEVELFloodplain area risk level based on FLD_ZONE field.GeoPlanHIGH RISK - COASTAL AREASIn communities that participate in the NFIP, mandatory flood insurance purchase requirements apply to all of these zones: V, VE, V1 - 30.Producer definedHIGH RISK AREASIn 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.Producer definedMODERATE RISK AREASIn communities that participate in the NFIP, flood insurance is available to all property owners and renters in these zones: 0.2 PCT ANNUAL CHANCE FLOOD HAZARDProducer definedMODERATE TO LOW RISK AREASIn 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.Producer definedOPEN WATERBody of open water that has no defined flood hazard.Producer definedUNDETERMINEDAreas 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.Producer definedRISK_LEVELString5000FHZ_LABELText description of flood zones for map legends based on the FLD_ZONE and ZONE_SUBTY fields. This field matches FEMA's National Flood Hazard Layer (Official) Map Viewer (http://fema.maps.arcgis.com/home/webmap/viewer.html) for the Flood Hazard Zones section of the Map's Legend. Please See: FIS Report Technical Reference, 5.3 Figure 3, Map Legend for FIRM (pg 67 of 85). Refer to the FIRM Panel Technical Reference for the font and symbology specifications of each of these elements in the Map Legend. https://www.fema.gov/media-library-data/1481731412602-a7d8526b8dde6d6e69ef3bbabf2bd68c/FIRM_Panel_Technical_Reference_Nov_2016.pdfGeoPlan0.2% ANNUAL CHANCE FLOOD HAZARD0.2% ANNUAL CHANCE FLOOD HAZARDFEMA (http://fema.maps.arcgis.com/home/webmap/viewer.html)1% ANNUAL CHANCE FLOOD HAZARD1% ANNUAL CHANCE FLOOD HAZARDFEMA (http://fema.maps.arcgis.com/home/webmap/viewer.html)AREA NOT INCLUDEDAREA NOT INCLUDEDFEMA (http://fema.maps.arcgis.com/home/webmap/viewer.html)AREA OF MINIMAL FLOOD HAZARDAREA OF MINIMAL FLOOD HAZARDFEMA (http://fema.maps.arcgis.com/home/webmap/viewer.html)AREA OF UNDETERMINED FLOOD HAZARDAREA OF UNDETERMINED FLOOD HAZARDFEMA (http://fema.maps.arcgis.com/home/webmap/viewer.html)AREA WITH REDUCED RISK DUE TO LEVEEAREA WITH REDUCED RISK DUE TO LEVEEFEMA (http://fema.maps.arcgis.com/home/webmap/viewer.html)OPEN WATEROPEN WATERFEMA (http://fema.maps.arcgis.com/home/webmap/viewer.html)REGULATORY FLOODWAYREGULATORY FLOODWAYFEMA (http://fema.maps.arcgis.com/home/webmap/viewer.html)FHZ_LABELString5000DESCRIPTBased on SFHA_TF field description.GeoPlanINSIDE SPECIAL FLOOD HAZARD AREA[SFHA_TF] - "T" value description.Producer definedOUTSIDE SPECIAL FLOOD HAZARD AREA[SFHA_TF] - "F" value description.Producer definedDESCRIPTString5000FGDLAQDATEThe date GeoPlan acquired the data from the source.GeoPlanFGDLAQDATEDate800AUTOIDAUTOIDInteger410Unique ID added by GeoPlan. This field is for historic tracking of features.0SHAPE.AREASHAPE.AREADouble00Area of feature in internal units0SHAPE.LENSHAPE.LENDouble00Length of feature in internal units0The 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.pdf/9j/4AAQSkZJRgABAQEAAAAAAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRofHh0a
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