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《Journal of Engineering Graphics》 2005-01

## Automatic Drawing of Clothoid Curve for Railway or Highway Based on AutoCAD

QIU Rong-mao1, WANG Da-ming2, ZHOU Qiao-yong1 (1.College of Civil Engineering, Shijiazhuang Railway Institute, Shijiazhuang 050043, China;2.College of Mechanical Engineering, Shijiazhuang Railway Institute,Shijiazhuang 050043, China)
This paper Introduces the concept of formation, primary points and synthetic elements of the clothoid curve in line engineering drawing for Railway or Highway. The equation describing clothoid curve and formula calculating primary points coordinate of clothoid curve are presented by means of geometry, calculus and progression. Multiple alternations of user coordinate make the user coordinate of AutoCAD is identical with that of clothoid curve. On the basis of this, by programming of AutoLISP, automatic drawing of clothoid curve along with circular is achieved.
【CateGory Index】： TP391.72
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 【References】
 Chinese Journal Full-text Database 2 Hits
 1 WANG Ming-sheng, YAN Xiao-yong ( College of Transportation Engineering, Shijiazhuang Railway Institute, Shijiazhuang Hebei 050043, China );Study on Drawing Method of Transition Curve in GIS[J];Journal of Engineering Graphics;2010-01 2 PAN Xiao-ming1,2,ZHANG Yong3,KONG Juan1,2(1.Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;2.Key Laboratory of Geotechnical and Underground Engineering,Tongji University,Shanghai 200092,China;3.Public Works Department of Jinan Railway Bureau,Jinan Shandong 250001,China);Development and Implementation of Asymmetric Clothoid Curve Based on AutoCAD[J];Journal of Engineering Graphics;2010-03
 【Co-references】
 Chinese Journal Full-text Database 10 Hits
 1 I Jian-jun,XU Guo—hua,HE Min,SONG Yan (Transportation Research Center,Beijing University of Technology,Beijing 100022,China);search Progress on GIS-T Data Models[J];Journal of Beijing Polytechnic University;2004-03 2 Liu Chaoyang; Ren Futian(Department of Civil Engineering,Beijing Polytechnic University, 100022);The Automatic Design of Highway Profile by Computer[J];JOURNAL OF BEIJING POLYTECHNIC UNIVERSITY;1994-01 3 LEI Wei-gang①,LIU Da-jie②,TONG Xiao-hua②(①Guangdong Electric Power Design Institute,Surveying Department,Guang Zhou,510600;②Department of Surveying and Geo-informatics,Tongji University,Shanghai 200092);Research on adjustment models for curve generalization in GIS[J];Science of Surveying and Mapping;2005-03 4 WEN Chang-ping (Urban Construction Departure of Shaoyang University, ShaoYang 422000);Application of hermite interpolating function to the design of highway’s horizontal alignment[J];Science of Surveying and Mapping;2007-03 5 JIANG Jian guo;A Study of Connecting Curve Drawing in Computer-aid Cartography[J];Bulletin of Surveying and Mapping;2003-04 6 ZHANG Fu-rong,JIAO Guang-yan;Coordinate Calculation of Points on Medial Transition of Ovum-shaped Curve Using Re-building Method[J];Bulletin of Surveying and Mapping;2004-01 7 TONG Xiao hua 1,2 ,SHI Wen zhong 2, LIU Da jie 1 (1. Department of Surveying and Geomatics, Tongji University, Shanghai,200092; 2. Department of Land Surveying & Geo Informatics, The Hong Kong Polytechnic University,HongKong);Uncertainty Model of Circular Curve Features in GIS[J];ACTA GEODAETICA ET CARTOGRAPHIC SINICA;1999-04 8 ZHONG Jing~(1) WANG Wei~(2) XIONG Hanjiang~(2) PENG Xiaoyuan~(1)(School of Resource and Environment Science,Wuhan University, State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,129 Luoyu Road,Wuhan 430079,China);DESIGN AND IMPLEMENTATION OF 3D SPATIAL OBJECT MODEL COMPONENT LIBRARY BASED ON COM[J];Journal of Geomatics;2006-02 9 HE Yi, LI Jin bao, GONG De jun (Changsha Communications University, Changsha 410076, China);The Research on Application of Cubic NURBS Curves in Highway Alignment Design[J];JOURNAL OF CHANGSHA COMMUNICATIONS UNIVERSITY;1999-04 10 Li QuanXin,Ye Gang (Zhengzhou Planning & Survey Research Institute,Zhengzhou 450052,China);Precise Displaying of Complete and Incomplete Easement on AutoCAD[J];Urban Geotechnical Investigation & Surveying;2007-01
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