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Visualization issues in the development of electronic atlas in China 被引量:2
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作者 WANGYingjie SUYing +2 位作者 CHENXiaogang YUZhuoyuan LiqiuMENG 《Journal of Geographical Sciences》 SCIE CSCD 2005年第1期87-96,共10页
In this paper, we discuss the development of electronic atlas in China, with focus on the issues of visualization. We particularly categorise this development into four periods, and then analyse the characters in each... In this paper, we discuss the development of electronic atlas in China, with focus on the issues of visualization. We particularly categorise this development into four periods, and then analyse the characters in each period and discuss the visualization issues. The four periods are highlighted: 1) Infant period (<1990) characterized as computer assisted mapping with products of screen maps; 2) Starting period (1991-1995) characterized as object-oriented mapping with products of interactive maps/atlases; 3) Advancing period (1996-2000) characterized as integrated mapping with products of multimedia cartographic maps; 4) New era (> 2001) characterized as web mapping and adaptive map design with products of Internet maps and atlas as well as adaptive maps. It is obvious that the development follows the logical way from static to dynamic, and even real time visualization, from single user to multiple users, from presentation to exploration for effective communication and knowledge construction. Current research and development projects are focused on customisation of atlas information systems for real-time tasks, Internet operability, small displays and mobile environments. The major challenges involved in each of such customisation processes are identified and commented in relation to the further development of visualization. 展开更多
关键词 computer-assisted mapping interactive maps multimedia maps Internet maps adaptive maps electronic atlas
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基于GIS的武汉市公共信息服务系统的研制
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作者 朱体高 於新国 罗苏 《地理空间信息》 2007年第5期4-5,共2页
介绍了武汉市公共服务系统项目研制的目的——通过网络电子地图、触摸屏电子地图、光盘电子地图搭建公共服务系统平台,服务于公众。阐述了系统的内容,并着重分析了系统功能实现中数据库和功能模块的设计。
关键词 地理信息系统 多媒体 数据库 电子地图 公共信息
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基于三维时空轨迹的拼车改进算法研究 被引量:1
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作者 张承德 别紫妮 《计算机工程与应用》 CSCD 北大核心 2019年第13期239-245,共7页
由于私家车数量剧增导致道路拥堵日益严重,拼车作为一种更加环保的出行方式成为人们出行的重要选择。为了提高拼车服务质量,轨迹匹配正成为一个新的研究热点。传统的基于Hausdorff距离的轨迹匹配存在两个问题:只考虑了路径上点的坐标信... 由于私家车数量剧增导致道路拥堵日益严重,拼车作为一种更加环保的出行方式成为人们出行的重要选择。为了提高拼车服务质量,轨迹匹配正成为一个新的研究热点。传统的基于Hausdorff距离的轨迹匹配存在两个问题:只考虑了路径上点的坐标信息,忽略了用户等待时间;直接计算整段路径的Hausdorff距离,无法体现特殊路段对匹配度量的影响。针对上述问题提出两点改进:提出带有时间约束的Hausdorff距离计算方法;提出了一种优化的轨迹匹配方法:用转向点分割原路径,将匹配度量细化到每个子路段。为了评估所提出框架的性能,从Google地图获取到大量中国湖北省武汉市的路线图,实证研究表明,相较于传统的最小完成时间在线模式调度(MCT)算法,所提出的方法能够帮助乘客找到更匹配的轨迹,减少等待时间,从而减少大气污染。 展开更多
关键词 时空多媒体分析 时间约束 谷歌地图 拼车
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