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《Science of Surveying and Mapping》 2006-01
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A new method for automatic extracting terrain feature lines from digitized terrain data

ZHANG Weijun~ ①,② KONG Jinling~ ① WANG Wenke~ ② WENG Xiaopeng~ ② (①Shool of Earth Science and Resources Management,Chang’an University,Xi’an 710054; ②Shool of Enviroment Science and Engineering, Chang'an University, Xi'an 710054)  
The usual method for extracting ridge line and valley line is based on geometric and physical character which is difficult to use the information hiding in the digital data.This paper proposes a method to extract terrain feature points by Douglas-Peuker by combining sketch dispart and collection waterline of the region.We identify and classify character points using dispart and collection waterline ,finally extract Ridge and Valley line.the method combining geometry and physics of Ridge or Valley line. The results show coicidence of Ridge and Valley line with terrain.
【Fund】: 国家自然科学基金资助项目(40472131)
【CateGory Index】: P282
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