{ "currentVersion": 10.71, "id": 0, "name": "DFIRM Flood Zones", "type": "Feature Layer", "description": "Flood Hazard Zones: A - An area inundated by 100 year flooding, for which no BFE's (Base Flood Elevations) have been established. AE - An area inundated by 100 year flooding, for which BFE's have been determined.AH - An area inundated by 100 year flooding (usually an area of ponding), for which BFE's have been determined; flood depths range from 1 to 3 feet.AO - An area inundated by 100 year flooding (usually sheet flow on sloping terrain), for which average depths have been determined: flood depths range from 1 to 3 feet.D - An area of undetermined but possible flood hazards.X - An area that is determined to be between the 100- and 500-year floodplains. The National Flood Hazard Layer (NFHL) data incorporates all Flood Insurance Rate Map (FIRM) databases published by the Federal Emergency Management Agency (FEMA), and any Letters of Map Revision (LOMRs) that have been issued against those databases since their publication date. It is updated on a monthly basis. The FIRM Database is the digital, geospatial version of the flood hazard information shown on the published paper FIRMs. The FIRM 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, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The FIRM Database is derived from Flood Insurance Studies (FISs), previously published 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. The NFHL is available as State or US Territory data sets. Each State or Territory data set consists of all FIRM Databases and corresponding LOMRs available on the publication date of the data set. The specification for the horizontal control of FIRM Databases is consistent with those required for mapping at a scale of 1:12,000. 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