摘要: 根据基于位置的服务(LBS)系统中移动端地理空间数据的表达以及空间信息传输要求,分析可升级矢量图形(SVG)应用于LBS的优势,结合分级分块模型,提出SVG的五层结构组织模型,基于该模型实现空间数据的按需传输方法。实验结果证明,该系统能较好地适应客户端低内存弱处理能力的硬件环境,有效降低对无线网络带宽的要求。
关键词:
基于位置的服务,
可升级矢量图形,
移动导航系统,
五层结构模型,
Java2微型版
Abstract: For the problem of geospatial data expression in the mobile-side and transmission between server and client, this paper summarizes the advantages of Scalable Vector Graphic(SVG) used in Location Based Service(LBS), puts forward SVG five-layer structure organization model with grade block model, and the methods based on the five-layer model of on-demand transmission. Experimental results prove that this system can suit to the client hardware environment, and effectively reduce the bandwidth requirements of wireless networks.
Key words:
Location Based Service(LBS),
Scalable Vector Graphic(SVG),
mobile navigation system,
five-layer model,
J2ME
中图分类号:
徐财福, 刘厚泉, 谢婧, 韩陈寿. LBS图形文件组织与传输方法研究[J]. 计算机工程, 2011, 37(9): 273-275.
XU Cai-Fu, LIU Hou-Quan, XIE Jing, HAN Chen-Shou. Organization and Transmission Method Research of Graphic Document in Location Based Service[J]. Computer Engineering, 2011, 37(9): 273-275.