Internal TFHC designation.Īn area inundated by flooding, for which BFEs or average depths have not been determined. Internal TFHC designation.Īn area that is located within a community or county that is not mapped on any published FIRM (Usually a community not participating in NFIP). An arbitrary channel width of 3 meters is shown.Īreas subject to inundation by the 1-percent-annual-chance flood event determined by detailed methods., for which base flood elavations have been established.Ĭoastal area inundated by 100-year flooding with velocity hazard (wave action) no BFEs have been determined.Īn area of Data Discrepancy or an Unclaimed Area. This is an area inundated by 500-year flooding an area inundated by 100-year flooding with average depths of less than 1 foot or with drainage areas less than 1 square mileĪ body of open water, such as a pond, lake ocean, etc., located within a community’s jurisdictional limits, that has no defined flood hazard.Īn area inundated by 100-year flooding with velocity hazard (wave action) no BFEs have been determined.Īn area inundated by 100-year flooding with velocity hazard (wave action) BFEs have been determined.ĥ00-year Flood Discharge Contained in ChannelĪn area where the 500-year flooding is contained within the channel banks and the channel is too narrow to show to scale. BFEs are not shown in this area, although they may be reflected on the corresponding profileĪn area designated as outside a “Special Flood Hazard Area” (or SFHA) on a FIRM. An arbitrary channel width of 3 meters is shown. This is an area to be protected from the 100-year flood by a Federal flood protection system under construction.Īn area inundated by 100-year flooding, for which BFEs have been determined.Īn area inundated by 100-year flooding (usually an area of ponding), for which BFEs have been determined flood depths range from 1 to 3 feet.Īn area that is located within a community or county that is not mapped on any published FIRM.Īn 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.Īn area inundated by flooding, for which BFEs or average depths have been determined.Īn area inundated by 500-year flooding an area inundated by 100-year flooding with average depths of less than 1 foot or with drainage areas less than 1 square mile or an area protected by levees from 100-year flooding.Īn area that is determined to be outside the 100- and 500-year floodplains.Īn area of undetermined but possible flood hazards.Īn area that includes the channel of a river or other watercourse (Usually adjacent to Zone AE).Īn area where the floodway is contained within the channel banks and the channel is too narrow to show to scale. An arbitrary channel width of 3 meters is shown.Īn area inundated by 100 year flooding, for which no BFEs have been established.Īn area inundated by 100-year flooding, for which no BFEs have been determined. No distinctions are made between the different flood hazard zones that may be included within the SFHA.ġ00-year Flood Discharge Contained in ChannelĪn area where the 100-year flooding is contained within the channel banks and the channel is too narrow to show to scale. For more information on using the data in Google Earth™, please see Using the National Flood Hazard Layer Web Map Service (WMS) in Google Earth™.This is an area inundated by 100-year flooding for which BFEs or velocity may have been determined. To do so, you will need GIS or mapping software that can read data in shapefile format.įEMA also offers a download of a KMZ (keyhole markup file zipped) file, which overlays the data in Google Earth™. This data can be used in most GIS applications to perform spatial analyses and for integration into custom maps and reports. Using the “Search All Products” on the MSC, you can download the NFHL data for a County or State in a GIS file format. You can also use the address search on the FEMA Flood Map Service Center (MSC) to view the NFHL data or download a FIRMette. For more information on available services, go to the NFHL GIS Services User Guide. Technical GIS users can also utilize a series of dedicated GIS web services that allow the NFHL database to be incorporated into websites and GIS applications. In the NFHL Viewer, you can use the address search or map navigation to locate an area of interest and the NFHL Print Tool to download and print a full Flood Insurance Rate Map (FIRM) or FIRMette (a smaller, printable version of a FIRM) where modernized data exists. Or you you may view, download, and print current local digital effective flood hazard data in an ArcGIS map. Shaded Zone X: Area of moderate flood hazard usually depicted on FIRMs as between the limits of the base and 500-year floods of the primary source of flooding.
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