APPARATUS AND METHOD FOR WATERSHED EXTRACTION USING POLYGON AND DIGITAL ELEVATION MODEL

摘要

The present invention actually uses through the DEM for the deformation for minimizing landform when DEM is modified and is to provide a kind of extraction watershed boundary as matching,DEM ,From one in the master data for being used for the less DEM cell groups of height change in front storage by an existing vector hacheonmang,Control is so the vector hacheonmang and vector watershed boundary that the data of the verified qualification old and that storage unit is utilized of burning processor are extracted(Polygon)So the height for the DEM cell match that burn method control is stored in a storage unit,The DEM analysis for analyzing the DEM extracted from comprehensive burning processor distributes together,Hacheonmang and watershed boundary air-extractor,Wherein extract hacheonmang and watershed boundary,It is based on the DEM analysis from DEM analysis unit,The hacheonmang and watershed boundary watershed boundary for the extraction being stored in a storage unit from extractor and watershed boundary compare,Watershed boundary error interval detector,It is used for the basin profiled spaces for selecting to be used for difference,The current rising of the DEM units in mistake as the detection basin outline position in watershed boundary error interval detector is higher than before combination DEM units peak time there includes the boundary error interval D EM of basin change is sent to the DEM analysis of change.