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《Acta Geodaetica et Cartographica Sinica》 2008-04
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An Algorithm for Detecting the Geometric Difference between the Road Networks

ZHANG Yun1,LI Qing-quan2,CAO Xiao-hang1,XU Jin-hui11.NavInfo Co.,Ltd.,Beijing 100088,China;2.Transportation Research Center,Wuhan University,Wuhan 430072,China  
Detecting the geometric difference between the road networks has a realistic significance on the data update,data compression and quality check in navigation map.Considering the feature of the problem in question,we propose an algorithm based on sweep-line paradigm that can find the geometric difference between the road networks efficiently.Its computational complexity is O((n+s)logn),where n is the input data size and s is the intersections.The practical application has demonstrate that the proposed algorithm achieves a good performance in terms of efficiency and robustness,which meets the requirement.
【Fund】: 国家自然科学基金项目(40571134);; 国家973计划项目(2006CB705500)
【CateGory Index】: TP391.41
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