National Flood Hazard Layer (NFHL)

ISO-19139 Metadata

Metadata Information

Metadata character set: utf8

Last update:

Metadata contact:

Scope of the data described by the metadata: dataset

Scope name: dataset

Name of the metadata standard used: ISO 19139 Geographic Information - Metadata - Implementation Specification

Version of the metadata standard: 2007

Metadata identifier: 299e82ea31b94f77a326a9300052daff

Data Identification Information

Resource citation:

Title: National Flood Hazard Layer (NFHL)

Date:

Reference date - creation: 2020-02-10T21:41:36

Date:

Reference date - revision: 2024-10-31T12:32:26

Descriptive keywords:

Keyword type not provided

Keywords: nfhl, nfip, flood, risk, fema, National Flood Hazard

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 National Flood Hazard Layer (NFHL) is a compilation of GIS data that comprises a nationwide digital Flood Insurance Rate Map.

Dataset language:

Dataset character set: utf8

Resource extent:

Credits: Federal Emergency Management Agency (FEMA)

Reference System Information

Reference system identifier:

Value: 4269

Code space: EPSG

Distribution Information

Distribution format:

Format name: Map Service

Format version:

Transfer options:

Online distribution information:

Online location: https://hazards.fema.gov/arcgis/rest/services/public/NFHL/MapServer