#Flood insurance rate map upgrade

The spatial data displayed on the DFIRMs is incorporated into FEMA's National Flood Hazard Layer which can be viewed on DNR's mapping application. Light Detection and Ranging (LiDAR) elevation data is used for all current and future DFIRM production in Wisconsin.ĭFIRMs are available for download at FEMA's Map Service Center. In addition, the best available terrain data is used in the mapping process, which results in higher quality mapping products. The DFIRMs show areas at risk to flooding overlain on aerial photos. The newer maps are called Digital Flood Insurance Rate Maps (DFIRMs).

#Flood insurance rate map upgrade

In 2003, FEMA implemented a map modernization initiative to upgrade and distribute the maps in a digital format rather than on paper. In the past, Flood Insurance Rate Maps were produced by FEMA and distributed on paper. To learn more about using the maps visit FEMA's FIRM Tutorial and FIS Tutorial. Effective FIRMs and Preliminary FIRMs are available on FEMA's Map Service Center. Newer FIRMs use aerial photos as the base layer making it easier to determine if a structure or property is within a mapped floodplain. Using the mapsįlood Insurance Rate Maps (FIRMs) are maps of areas at risk to flooding also known as floodplains or Special Flood Hazard Areas (SFHA). The FIRMs can be changed through Letters of Maps Change (LOMCs). The FIRMs are based on engineering studies called Flood Insurance Studies (FIS). The Federal Emergency Management Agency (FEMA) produces Flood Insurance Rate Maps (FIRMs) that show areas at risk to flooding.