EPA Environmental Dataset Gateway


Open/Close section Identification Information
Abstract: 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, the 0.2-percent-annual-chance flood event, 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 the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the UTM projection and coordinate system.The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000. The EPA region 2 extracted the s_FLD_Haz_ar shapefile which contains the location and attributes flood insurance risk zones, reprojected into r2 projection and converted into oracle spatial layer.
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 DFIRM Database presents the flood risk information depicted on the FIRM in a digital format suitable for use in electronic mapping applications. The DFIRM database is a subset of the Digital FIS database that serves to archive the information collected during the FIS.
Open/Close section Distribution Information
Download URL: www.fema.gov
Open/Close section Time Period of Content
Publication Date: 20050930
Progress: Completed
Frequency: Irregular
Open/Close section Single Date
Date: 20050930
Currentness: FIRM and FIS effective date
Open/Close section Spatial Domain
West Bounding Longitude: -74.3797
East Bounding Longitude: -73.8665
North Bounding Latitude: 41.2516
South Bounding Latitude: 40.622
Zoom to the metadata envelope
Open/Close section Constraints
License 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. FEMA will warrant the delivery of this product in a computer-readable format, and will offer appropriate adjustment of credit when the product is determined unreadable by correctly adjusted computer input peripherals, or when the physical medium is delivered in damaged condition. Requests for adjustment of credit must be made within 90 days from the date of this shipment from the ordering site.
Access: None.
Use: The hardcopy FIRM and DFIRM and the accompanying FISs are the official designation of SFHAs and
Open/Close section Theme Keywords
Theme Topics: Environment and Conservation, FEMA Flood Hazard Zone, DFIRM, Digital Flood Insurance Rate Map, NFIP, SFHA, Flood Insurance Rate Map, FIRM, Floodway
Open/Close section Contact Information
Originator: Federal Emergency Management Agency
Open/Close section Metadata Reference Information
Metadata Date Stamp: 2008-03-19
Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998