Description: This dataset contains information about the FIRM Panel areas. The spatial entities representing FIRM panels are polygons. The polygon for the FIRM panel corresponds to the panel neatlines. Panel boundaries are generally derived from USGS DOQQ boundaries. As a result, the panels are generally rectangular. FIRM panels must not overlap or have gaps within a study. In situations where a portion of a panel lies outside the jurisdiction being mapped, the user must refer to the S_Pol_Ar table to determine the portion of the panel area where the FIRM Database shows the effective flood hazard data for the mapped jurisdiction. This information is needed for the FIRM Panel Index and the following tables in the FIS report: Listing of NFIP Jurisdictions, Levees, Incorporated Letters of Map Change, and Coastal Barrier Resources System Information. 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.
Description: This dataset contains information about the Base Flood Elevations (BFE) within a study area. BFE lines indicate the rounded whole-foot water surface elevation of the 1-percent-annual-chance flood. The spatial elements representing BFE features are lines extending from Special Flood Hazard Area (SFHA) boundary to SFHA boundary. The BFE lines will have no visible gaps or overshoots between the SFHA boundary and the end of the BFE line at the publication scale of the DFIRM. However, the ends of the BFE lines are not necessarily snapped precisely to the SFHA boundary. Each BFE is represented by a single line. The Base Flood Elevation (BFE) information is required for any digital data where BFE lines will be shown on the corresponding Flood Insurance Rate Map (FIRM). Normally if there are any riverine AE zones, BFE lines are required. While BFE lines are depicted as wavy lines on the hardcopy FIRM, they should be primarily straight lines in the spatial data, although they may bend consistent with procedures described in Volume 1 of these Guidelines. The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event (100 year), the 0.2-percent-annual-chance flood event (500 year), and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by FEMA.
Description: 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.
Copyright Text: 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
Description: 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 floodplain
Copyright Text: 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
Description: This is a raster data set with a 10-meter cell size based on the DFIRM_FLDHAZ vector layer. This layer includes breakdown of all 100-year flood zones (A, AE, AH, AO, V, VE).
Copyright Text: 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
Description: 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 500-year floodplain.
Copyright Text: 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