Computer Engineering and Applications ›› 2007, Vol. 43 ›› Issue (27): 26-27.
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MENG Liang,FANG Jin-yun
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孟 亮,方金云
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Abstract: A contour tree has found many important applications in map generalization,terrain analysis,etc.with respect to generating contour tree,this paper has proposed a scan-line based method,this method translates intersection point pair of scan-line and contour line as range,explains containment relation between range as containment relation between contour lines,determines “one-many” direct containment relations between parent contour and child contour by this method.Compared with other methods,this method has the advantage of easy understanding and realization,has quick execution speed.
Key words: contour tree, spatial relations of contour lines, scan line
摘要: 等高线树在地图的产生、地形分析等应用中具有较重要的应用。对于产生等高线树,提出了一种基于扫描线的方法,该方法把扫描线和等高线之间的交点对解释为区域,利用区域之间的包含关系对应等高线之间的包含关系,以这种方式来确定父等高线与子等高线之间的“一对多”直接包含关系。与其他方法相比,该方法较容易理解与实现,且执行速度较快。
关键词: 等高线树, 等高线空间关系, 扫描线
MENG Liang,FANG Jin-yun. Scan-line based contour tree generation method[J]. Computer Engineering and Applications, 2007, 43(27): 26-27.
孟 亮,方金云. 基于扫描线的等高线树生成法[J]. 计算机工程与应用, 2007, 43(27): 26-27.
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http://cea.ceaj.org/EN/Y2007/V43/I27/26