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《Science of Surveying and Mapping》 2006-04
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The auto-extraction and batch-assignment of contours based on brown edition of topographic maps

ZHANG Bao-lei~(①②),SONG Meng-qiang~①,ZHOU Wan-cun~①(①Institute of Mountain Hazards and Environment,Chinese Academy of Sciences & Ministry of Water Conservancy,Chengdu 610041;②Graduate School of Chinese Academy of Sciences,Beijing 100039)  
Topographical contours have important meanings in geographical study,and their automatic extraction and assignment are important subjects in geographical information system.This paper introduces image segmentation technology in the extraction process to extract the contours on the segmented brown editions of topographic maps,through setting up the average attribute range on the red,green and blue wave band respectively and taking the unique shape of contours as reference.Different types of spoilt parts are rejoined through image treatment technology.The interactive batch assignment to the contours is down through programming.Finally,such problems as spoilt parts,crossed and adhesive lines during the extraction of contour were well solved.
【Fund】: 国务院三峡建设委员会办公室资助项目“三峡工程生态环境动态与实时监测(SX[2002]004)”子课题“三峡地区1:5万生态环境监测(SX[2002]00401)”;; 中科院知识创新方向性项目“长江中下游土地利用覆被变化和信息系统”(KZCX2-SW-319-01)部分成果
【CateGory Index】: P283.1
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