IEMIS (Integrated Emergency Management Information System) Floodplain Mapping Based on a Lidar Derived Data Set

摘要

The LIDAR demonstration project has shown that ground elevation data required by FIA for FISs can be collected digitally, and rapidly, through the application of laser ranging technology. LIDAR technology offers some clear advantages in flexibility, speed, and data quantity over conventional surveying. Laser ranging technology is mature and precise; however, the ability to maintain aircraft position control at all times within accuracy limits that allow LIDAR data to be applied to FISs remains a challenge. The analysis of the test data indicates that, with due care and planning, this objective can be achieved. IEMIS, with GIS, modeling, and networking capabilities, can be used to automate the revision, update, and analysis of flood hazard maps produced by FIA. The major constraint to the development of digital floodplain analyses is the lack of digital topographic data. Through application of FAST software, WES has demonstrated that digital LIDAR can make the automation of flood hazard analysis and mapping, and the exploitation of IEMIS for NFIP applications, feasible.