Digital Flood Maps: From Q3 Flood Data to DFIRMs
The Federal Emergency Management Agency (FEMA) has produced two flood map products using Geographic Information System (GIS) technology in support of the National Flood Insurance Program. The first digital product FEMA created is called Q3 Flood Data. As technology advanced, FEMA then created Digital Flood Insurance Rate Maps (DFIRMs). As part of Flood Map Modernization, FEMA will only update or produce DFIRMs. This flyer explains the change and transition from using Q3 flood data to the production and use of DFIRMs.