结合手机定位与数字地图传送功能,对J2ME开发平台下基于手机定位实现便携式移动导航系统进行了研究,提出了可行的解决实现方案。利用手机提供的基于位置服务功能LBS(Location Based Server),通过无线通信网络传送用户所在区域的数字地图...结合手机定位与数字地图传送功能,对J2ME开发平台下基于手机定位实现便携式移动导航系统进行了研究,提出了可行的解决实现方案。利用手机提供的基于位置服务功能LBS(Location Based Server),通过无线通信网络传送用户所在区域的数字地图,为用户提供定位、导航、服务等多种相关的信息。整个系统由无线移动终端、数字地图服务器、网关3部分组成,通过在手机中内嵌J2ME-MIDP,让手机端可以提供更新准确的定位服务,地图服务器和网关建立在传统的以太网络上,可以有效地减少网络通信的时间,降低系统复杂度。实验中以浙江大学校园地图为例,结合WAP Push技术和手机定位功能,成功地实现了手机导航的功能。展开更多
With the development of mobile technology, Internet and GIS, LBS plays an important role in various applications. From the perspective of LBS, it is one of the main tasks of matching 3-dimensional spatial-temporal tra...With the development of mobile technology, Internet and GIS, LBS plays an important role in various applications. From the perspective of LBS, it is one of the main tasks of matching 3-dimensional spatial-temporal trajectories. We present an interpoiation based Modified Hausdorff Distance algorithm for 3-dimensional spatial-temporal Trajectory Matching （IMHD-ST）. It adopts interpolation algorithm to shield the impact to the distance between trajectories due to different position updating porices, sampling granularity, initial position and so on in Moving Object Database （MOD）. Besides, it uses MHD to deal with the implicit spatial information and structural information of weighted position updating points in various trajectories and reflects the discrepancy of moving results through the spatial distance between trajectories. In addition, it adopts temporal distance corresponding to the spatial distance between trajectories to reflect the differences including direction, speed and so on during moving process. The experimental results show that the algorithrn can reflect the trajectory similarity between 3-dimensional mobile objects more correctly, accurately and robustly.展开更多
文摘结合手机定位与数字地图传送功能,对J2ME开发平台下基于手机定位实现便携式移动导航系统进行了研究,提出了可行的解决实现方案。利用手机提供的基于位置服务功能LBS(Location Based Server),通过无线通信网络传送用户所在区域的数字地图,为用户提供定位、导航、服务等多种相关的信息。整个系统由无线移动终端、数字地图服务器、网关3部分组成,通过在手机中内嵌J2ME-MIDP,让手机端可以提供更新准确的定位服务,地图服务器和网关建立在传统的以太网络上,可以有效地减少网络通信的时间,降低系统复杂度。实验中以浙江大学校园地图为例,结合WAP Push技术和手机定位功能,成功地实现了手机导航的功能。
文摘With the development of mobile technology, Internet and GIS, LBS plays an important role in various applications. From the perspective of LBS, it is one of the main tasks of matching 3-dimensional spatial-temporal trajectories. We present an interpoiation based Modified Hausdorff Distance algorithm for 3-dimensional spatial-temporal Trajectory Matching （IMHD-ST）. It adopts interpolation algorithm to shield the impact to the distance between trajectories due to different position updating porices, sampling granularity, initial position and so on in Moving Object Database （MOD）. Besides, it uses MHD to deal with the implicit spatial information and structural information of weighted position updating points in various trajectories and reflects the discrepancy of moving results through the spatial distance between trajectories. In addition, it adopts temporal distance corresponding to the spatial distance between trajectories to reflect the differences including direction, speed and so on during moving process. The experimental results show that the algorithrn can reflect the trajectory similarity between 3-dimensional mobile objects more correctly, accurately and robustly.
