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《Ship Engineering》 2004-06
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Study on the Way to Realize Real-time and Smooth Rotation of Electronic Chart

Wang Ruihua, Xu Zhaoxin and Jiang Yuezhi  
In the first, the method of dynamic la beling to several k inds of notes accompanying with rotation of electronic chart and the definition of arranging vector are given out, then, some approaches to real iz e real-time and smooth rotation of electronic chart in the ECDIS are in troduced. By combining t hree means of reducing needless drawing, separating plotting data from other cha r t data and not drawing directly onto destination showing windows, the r eal-time smooth rotation of electronic chart and showing can be ach ieved in high efficiency.
【CateGory Index】: U675.81
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