National Flood Hazard Layer (NFHL)


Metadata
File Identifier:
Metadata Language: eng; USA
: utf8
Resource Type: Dataset
Responsible Party:
Individual Name: Flood Map Service Center
Organisation Name: Federal Emergency Management Agency
Role: Point Of Contact
Contact Info:
Voice: 1-877-336-2627
Delivery Point: 500 C Street, S.W.
City: Washington
Administrative Area: District of Columbia
Postal Code: 20472
Country: USA
E-Mail Address: FEMAMapSpecialist@riskmapcds.com
Metadata Date: 2016-05-16
Metadata Standard Name: ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
Metadata Standard Version: ISO 19115-2:2009(E)
Data Identification
Abstract: The National Flood Hazard Layer (NFHL) is a compilation of GIS data that comprises a nationwide digital Flood Insurance Rate Map. The GIS data and services are designed to provide the user with the ability to determine the flood zone, base flood elevation, and floodway status for a particular location. It also has information about the NFIP communities, map panels, cross sections, hydraulic structures, Coastal Barrier Resource System, and base maps such as road, stream, and public land survey data. Through flood studies, FEMA produces Flood Insurance Study Reports, FIRM Panels, and FIRM Databases. FIRM Databases that become effective are incorporated into the NFHL. Updates to the NFHL are issued through Letters of Map Revision (LOMRs) and Letters of Map Amendment (LOMAs). Continuously updated, the NFHL serves as a Digital Flood Insurance Rate Map representing the current effective flood data for those communities where maps have been digitized. NFHL data can be viewed with widely available GIS software, including freely available programs that work with GIS shapefiles. For more information on the NFHL, see the online resources referenced herein. ___Using base maps:___ The minimum horizontal positional accuracy for base map hydrographic and transportation features used with the NFHL is the NSSDA radial accuracy of 38 feet. ___Letter of Map Amendment (LOMA) point locations___ are approximate. The location of the LOMA is referenced in the legal description of the letter itself. LOMA points can be viewed in the NFHL Interactive Map on the FEMA GeoPlatform.
Purpose: The 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.
Language: eng; USA
Citation:
Title: National Flood Hazard Layer (NFHL)
Date:
Date: 2015-01-30
Date Type: Publication Date
Edition: Version 1.1.1.0
Organisation Name: Federal Emergency Management Agency
Role: Publisher
Contact Info:
City: Washington
Administrative Area: D.C.
Organisation Name: Federal Emergency Management Agency
Role: Originator
Point Of Contact:
Organisation Name: Federal Emergency Management Agency
Role: Point Of Contact
Contact Info:
Voice: 1-877-336-2627
Delivery Point: 500 C Street, S.W.
City: Washington
Administrative Area: District of Columbia
Postal Code: 20472
Country: USA
E-Mail Address: FEMAMapSpecialist@riskmapcds.com
Topic Category:
Keyword Collection:
Keyword: NGDA
Keyword: National Geospatial Data Asset
Keyword: Elevation Theme
Associated Thesaurus: NGDA Portfolio Themes
Keyword: FIRM
Keyword: FEMA Flood Hazard Zone
Keyword: FIRM Database
Keyword: Special Flood Hazard Area
Keyword: Flood Insurance Rate Map
Keyword: CBRS
Keyword: Coastal Barrier Resources System
Keyword: Riverine Flooding
Keyword: Coastal Flooding
Keyword: NFIP
Keyword: Base Flood Elevation
Keyword: SFHA
Keyword: Floodway
Associated Thesaurus: FEMA NFIP Topic Category
Keyword: Alabama
Keyword: Alaska
Keyword: American Samoa
Keyword: Arizona
Keyword: Arkansas
Keyword: California
Keyword: Colorado
Keyword: Connecticut
Keyword: Delaware
Keyword: District of Columbia
Keyword: Federated State of Micronesia
Keyword: Florida
Keyword: Georgia
Keyword: Guam
Keyword: Hawaii
Keyword: Idaho
Keyword: Illinois
Keyword: Indiana
Keyword: Iowa
Keyword: Kansas
Keyword: Kentucky
Keyword: Louisiana
Keyword: Maine
Keyword: Marshall Islands
Keyword: Maryland
Keyword: Massachusetts
Keyword: Michigan
Keyword: Minnesota
Keyword: Mississippi
Keyword: Missouri
Keyword: Montana
Keyword: Nebraska
Keyword: Nevada
Keyword: New Hampshire
Keyword: New Jersey
Keyword: New Mexico
Keyword: New York
Keyword: North Carolina
Keyword: North Dakota
Keyword: Northern Mariana Islands
Keyword: Ohio
Keyword: Oklahoma
Keyword: Oregon
Keyword: Palau
Keyword: Pennsylvania
Keyword: Puerto Rico
Keyword: Rhode Island
Keyword: South Carolina
Keyword: South Dakota
Keyword: Tennessee
Keyword: Texas
Keyword: Utah
Keyword: Vermont
Keyword: U.S. Minor Islands
Keyword: Virgin Islands
Keyword: Virginia
Keyword: Washington
Keyword: West Virginia
Keyword: Wisconsin
Keyword: Wyoming
Associated Thesaurus: None
Spatial Extent:
West Bounding Longitude: -172
East Bounding Longitude: 147
North Bounding Latitude: 72
South Bounding Latitude: -15
Constraints: 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.
Legal Constraints:
Use Constraints: Other Restrictions
Other Constraints: Use Constraints: 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.
Legal Constraints:
Access Constraints: Other Restrictions
Other Constraints: Access Constraints: None
Distribution
Distribution Format:
Format Name: NFHL Status Page
Format Version:
Distribution Format:
Format Name: NFHL Interactive Map (FEMA GeoPlatform)
Format Version:
Distribution Format:
Format Name: Fact Sheet: National Flood Hazard Layer (NFHL)
Format Version:
Distribution Format:
Format Name: Get Flood Maps and Data from FEMA
Format Version:
Distribution Format:
Format Name: Download Seamless Nationwide NFHL GIS data
Format Version:
Distribution Format:
Format Name: FIRM Database Technical Reference
Format Version:
Distribution Format:
Format Name: Using NFHL GIS Web Services
Format Version:
Transfer Options:
URL: http://www.floodmaps.fema.gov/NFHL/status.shtml
Name:
Description:
Function:
Transfer Options:
URL: http://fema.maps.arcgis.com/home/item.html?id=cbe088e7c8704464aa0fc34eb99e7f30
Name:
Description:
Function:
Transfer Options:
URL: http://www.fema.gov/media-library/assets/documents/13424
Name:
Description:
Function:
Transfer Options:
URL: http://msc.fema.gov
Name:
Description:
Function:
Transfer Options:
URL: https://content.femadata.com/FIMA/Risk_MAP/NFHL/
Name:
Description:
Function:
Transfer Options:
URL: http://www.fema.gov/media-library-data/1449862521789-e97ed4c7b7405faa7c3691603137ec40/FIRM_Database_Technical_Reference_Nov_2015.pdf
Name:
Description:
Function:
Transfer Options:
URL: https://hazards.fema.gov/femaportal/wps/portal/NFHLWMS
Name:
Description:
Function:
Distributor:
Distributor Contact:
Organisation Name: FEMA, Flood Map Service Center
Role: Distributor
Contact Info:
Voice: 1-877-336-2627
Delivery Point: P.O. Box 3617
City: Oakton
Administrative Area: Virginia
Postal Code: 22124
Country: USA
E-Mail Address: FEMAMapSpecialist@riskmapcds.com
Quality
Scope: Dataset