Apparatus and Method for Watershed Extraction using Polygon and Digital Elevation Model

摘要

The present invention is actually using the DEM by minimizing the distortion of terrain when DEM modification and as matching is to provide an apparatus and method for extracting watershed boundary, DEM, vector hacheonmang and vector watershed boundary (polygon) extracted from a certified data that is utilized at the old and the storage unit to store the main data, the control and so burning processor for height changes less of DEM cells set in front through an existing vector hacheonmang and so burning method control the height of the DEM cells match stored in the storage unit, DEM analysis to analyze the DEM extracted from the aggregate burning processor together portion, and hacheonmang and watershed boundary extraction unit which extracts hacheonmang and watershed boundary based on DEM analysis from the DEM analysis unit, the hacheonmang and watershed boundary watershed boundaries extracted from the extractor and watershed boundaries stored in the storage unit compared, and watershed boundary error interval detector for selecting a watershed boundary interval for the difference, the current elevation of the DEM cell in error as the detection watershed boundary position in the watershed boundary error interval detector higher than before at the height of the set DEM cell There are comprising a watershed modified boundary error interval DEM is delivered to the DEM analysis of change. ;