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 State Plane 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 Division of Forestry has been managing forest resources for many years in the Matunuska-Susitna Valley (Mat-Su) area. The purpose of this GIS layer, is to create a spatial coverage of vegetation on state lands to aid in forest management.

Right of way and easements derived from the Mat-Su Borough Tax Maps. This is not an all-inclusive dataset and does not represent every ROW and easement in the Mat-Su Borough.