RIVER NETWORK GENERATING METHOD USING A DIGITAL ELEVATION MODEL, CAPABLE OF BUILDING A WATER RESOURCE GEOGRAPHICAL INFORMATION SYSTEM USING HEIGHT DATA OF A NUMERICAL MAP

摘要

PURPOSE: A river network generating method using a digital elevation model is provided to calculate flow accumulation using a flow direction grid according to a fixed condition.;CONSTITUTION: A DEM(Digital Elevation Model) passes through smoothing, dent filling or dent filling or removing and flat area removing procedures. The DEM is built using the height data of a numerical map. The DEM is converted into a DEM proper in a water resource field. The DEM simulates surface water flow by determining flow direction about each cell.;COPYRIGHT KIPO 2010