The FIRM is the basis for floodplain management, mitigation, and insurance activities for the National Flood Insurance Program (NFIP). The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12000. The file is georeferenced to earth's surface using the UTM projection and coordinate system. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA).
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 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 Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. Identification_Information: Citation: Citation_Information: Originator: Federal Emergency Management Agency Publication_Date: 20100927 Title: DCGIS.FldPlnPly Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Washington, DC Publisher: Federal Emergency Management Agency Other_Citation_Details: Metadata_File_Name: 110001_20100927_metadata.txt Online_Linkage: Larger_Work_Citation: Citation_Information: Originator: Federal Emergency Management Agency Publication_Date: 20100927 Title: FEMA CASE MICS_12682 Description: Abstract: