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《Science of Surveying and Mapping》 2009-05
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New method of spiral curve coordinate calculation

YIN Hai-feng①,BAI Zheng-dong①,CHENG Bo-hui②(①The university of Tsinghua,Beijing 100084,China;②Chinese Academy of Surveying And Mapping,Beijing 100039,China)  
On highway construction in last few years,many kinds of complicated spiral curve are used more commonly,such as ramp,C-type curve,S-type curve,etc.It's very complicated in processing these curves with traditional calculation method and hard to apply actually.Through research,a kind of new calculation method is found now.Compared with the traditional calculation method,it has two major advantages.Firstly,it can start counting at random point,which is very convenient.Secondly,its number of terms can be extended flexibly to meet the accuracy.These advantages of the new method make it handling many kinds of complicated spiral curve easily and have some guide significance in actual calculation.
【CateGory Index】: U412.24
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【Citations】
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【Co-citations】
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