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自发地理信息兴趣点数据在线综合与多尺度可视化方法
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自发地理信息兴趣点数据在线综合与多尺度可视化方法
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Journal Article
自发地理信息兴趣点数据在线综合与多尺度可视化方法
2015
Overview
移动及Web环境下,集成各种自发地理信息POI数据与地理框架背景数据的混搭式地图应用,越来越多地出现在主流地理信息平台及LBS 服务中.由于缺乏适宜的在线多尺度可视化机制,这种POI数据表达上通常出现拥挤、压盖等冲突现象.针对该问题,本研究将传统的尺度变换方法与在线环境相结合,提出一种面向城市设施POI数据的多尺度可视化策略.即由服务器端通过预处理方式对POI数据进行多层次结构化组织;在此基础上,客户端依据显示比例尺导出对应层次的POI目标,并通过移位操作解决局部存在的符号表达冲突现象.试验表明,该方法符合数字化网络应用的在线实时需求,同时也能获得较高质量的多尺度表达效果.
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