Flood prone areas were delineated using both njdep flood prone and fema q3 flood area. Edgematching errors, overlaps and deficiencies in coverage, and similar problems are not corrected during digitizing or postprocessing. The fema digital q3 flood data displayed on this web site is. Sourcewater protection areas kygeonet 305b program. Interpreting federal emergency management agency flood. This document is intended to provide the user of q3 flood data with detailed information regarding the contents of the q3 flood data files. The information on this page is intended for members of the general public and anyone looking to obtain fema flood hazard mapping products or information. As technology advanced, fema then created digital flood insurance rate maps dfirms.
Njdep flood prone areas were derived from usgs 100year floodplain coverage and include usgs documented and undocumented flood prone areas. The q3 flood data are derived from the flood insurance rate maps firms published by the federal emergency management agency fema. The nfhl is a computer database that contains fema s flood hazard map data. Specifications for the horizontal control of q3 flood data files are consistent with those required for mapping at a scale of 1. The specifications for the horizontal control of q3 flood data files are consistent with those. Dfirms provide more data than the q3 data and supply all the data that was previously available only on paper maps. The simplest way for you to access the flood hazard data, including the nfhl, is. For much of the us, gis flood data is available from fema in either dfirm database format or as q3 digital flood data from the fema map service center. More recent flood map products include digital firms, which are created using digital methods and can be incorporated into a communitys geographic information system gis. Gov for questions regarding fema flood map data please contact the fema flood map service center. The federal emergency management agency fema has produced two flood map products using geographic information system gis technology in support.
This flyer explains the change and transition from using q3 flood data to the production and use of dfirms. For much of the us, gis flood data is available from fema in either dfirm database format or as q3 digital flood data from. Choose a county using the filter button to the right. These data represent a subset of the data available on the paper flood insurance rate maps firm as provided by the federal emergency management agency fema. As part of flood map modernization, fema will only update or produce dfirms. Therefore all web service requests should use s protocols and arcgisrest url string. Femas q3 flood maps data may be downloaded from nc dot. The federal emergency management agency, or fema, is responsible for mapping flood zone areas in the us for the national flood insurance program. The data is georeferenced to the earth surface using the epsg. Q3 data is used where neither effective or preliminary data is available for a given community. In its continuing efforts to perform hazards mitigation and to improve customer service by expanding the availability of flood risk data, the federal emergency management agency fema has released the q3 flood data product. State hydrology series, kentucky geological survey site. Flood hazard mapping web site receives aawm gold award. Connect ncdot resources gis zfema flood data fema flood data by county.
Fema flood data nc state university libraries ncsu libraries. This map service is a composite of effective and preliminary floodplain data. Dogami statewide hazards viewer hazards and assets. The q3 flood data are derived from the flood insurance rate maps firms. Maptitude includes a free country package with a tremendous amount of nationwide geographic, census, and demographic data so that you can get started as soon as you install the software. Digital q3 flood zone data the q3 flood data are derived from the flood insurance rate maps firms published by the federal emergency management agency fema. The purpose of this page is to define available data, a commonly used term in floodplain management. Download fema q3 flood data specifications pdf file file size. The file is georeferenced to earths surface using geographic projection and decimal degree coordinate system.
This data set is a historical version of fema flood zone data. Statewide 100year floodplain polygons for west virginia. Windows version of the national flood frequency program. Fema provides access to the national flood hazard layer nfhl through web mapping services. Flood data fema q3 kygeonet sourcewater protection areas. Federal emergency management agency q3 tnris texas.
Q3 flood data files convey certain key features from the existing hard copy firm. The national flood hazard layer nfhl is a geospatial database that contains current effective flood hazard data. From the nfhl viewer, you may view, download, and print flood maps for. The specifications for the horizontal control of q3 flood data files are consistent with those required for mapping at a. The following is extracted from fema metadata the q3 flood data are derived from the flood insurance rate maps firms published by the federal emergency management agency fema. If you are unable to access the gis web services using the legacy. Instead of incorporating all data in a single layer, dfirms feature multiple layers and coverages that can be more easily combined with local data on features, such as vacant parcels, critical infrastructure, demography, and. The federal emergency management agency fema has produced two flood map products. Download this layer 66 mb shapefiles with arcgis 10.
Shows floodplain areas for 100 zonea and 500 zoneb year floods as identified by flood insurance rate firm maps. Dfirms can be accessed via maptitude by downloading the an xml file and then using the map imagery fema flood hazard zones command. Fema provides the flood hazard data to support the national flood. The q3 data layer available through massgis is a digital representation of the paper firms. Appendices these include a sample metadata file, femas dfirm and q3 product sheets, a list of the q3 flood data counties, and a glossary of terms and acronyms. The file is georeferenced to the earths surface using the universal transverse mercator utm projection and a zonal coordinate system units in meters. Fema floodplains bayfield county, wi official website. New york political boundary data obtained from the nys geographic information systems. The data was digitized from paper maps in the early 1990s. Fema q3 100 year floodplain fema q3 100 year flood plain fema q3 floodway r 12 e r e note. Q3 flood data, west virginia west virginia university. You can use the information to better understand your level of flood risk and type of flooding. Tmdl data from ky dow kygeonet usgs surface water monitoring sites. An overview of the q3 flood data product maybe found in the q3 flood data user guide.
The primary risk classifications used are the 1percentannualchance flood event, the 0. See the fema q3 page for important information about flood data for nc which is superseding q3, access to the original q3 data nc, sc, and va as part of the libraries geodata collection and q3 data documentation. This page provides an overview of the fema flood map service center msc, points to some of fema s flood mapping products, and provides a link to the full list of mapping products. Fema q3 100 year flood map skagit county slidelegend. Caliper provides an amazing amount of useful data with its maptitude mapping software and transcad transportation planning software. Flood zones, or special flood hazard areas sfhas get depicted on flood insurance rate maps firms. Q3 flood data files are intended to convey certain key features from the existing hard copy firm to provide users with automated flood risk data.
The q3 flood data files are intended to provide users with automated flood risk data that may be used to locate sfhas. Njdep flood prone areas were delineated by readily available information on past floods rather than from detailed surveys and. Fema provides the flood hazard data to support the national flood insurance program. Usgs peak flow stream data kygeonet about fema q3 flood data. Rivernet downloads, rivernet software, rivernet tutorials. In addition to the identification of special flood hazard areas, the risk zones shown on the firms are the basis for the establishment of premium rates for flood coverage offered through the nfip.
These maps blank out federal and state owned lands so the flood hazard in for instance state or national parks is not properly represented. Nys gis clearinghouse us federal emergency management. Gis web services for the fema national flood hazard layer. Attribute accuracy was tested by manual comparison of source graphic with hardcopy plots and a symbolized display. The first digital product fema created is called q3 flood data. Because of the scale of the digital q3 flood data, it cannot be used to determine. The first product is called q3 flood data and corresponds to fema s 1999 firm flood maps, and is available for over 0 counties in the u. Other new jersey political boundary data obtained from the new jersey department of environmental protections gis website. The q3 flood data will be distributed through femas internet server and on cd rom as the files become available. The fema q3 data is a digital version of existing fema firm flood insurance rate map maps. The simplest way for you to access the flood hazard data, including the. Specifications for the horizontal control of q3 flood data files are consistent with.
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