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《Science of Surveying and Mapping》 2009-02
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Isoline tracing technique based on search-circle

CHANG Hui,CHAI Hua-bin, ZOU You-feng(School of Surveying&Land Information Engineering,Henan Polytechnic University,Jiaozuo 454000,China)  
Isoline Tracing is the key in the course of drawing isoline map, Good tracing arithmetic may draw more precise than before, at the same time, it may economize quantities of time.The article puts forward a new tracing arithmetic-search-circle method based on traditional arithmetic and introduces particularly the tracing steps. The search-circle method can implement quickly part-scan and can heighten largely tracing efficiency. What is more, the method has good reliability.
【Fund】: 国家自然基金项目(40672177);; 河南省教育厅科技攻关项目(2007440005);; 河南理工大学青年骨干教师资助计划(649031);; 河南理工大学SRTP项目(07-3-106)
【CateGory Index】: TP391.41
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