Method of DEM Data´s Processing in Flood Simulation System

Flood simulation and forecasting is a hot topic of flood disaster research. DEM as the basic data plays a crucial role in the field. High resolution grid DEM data is able to supply exact terrain model to this work, but it brings on a bothering problem that the data is too big to reduce running efficiency in computer. Facing the issue, the paper tries to solve the problem of high resolution DEM data¿s processing and transferring. A new flood simulation method is introduced first. It brings a simple and efficient simulate method to simulate flood on high resolution DEM data. And then, a WebGIS based system is designed as flood simulation function¿s running platform. Advanced WebGIS technologies lead an efficient transferring way to DEM data and other relative images.