Abstract: The background and definition of mobile geographic information service are introduced. The solutions for server are analyzed in detail, and seven tiers architecture, including client tier, connection tier, gateway, the platform for mobile business and Location, service provider, GIS service and database, is presented. Four key technologies including wireless location, map buffer, multi-scale representation of spatial data and spatial data model of mobile terminal oriented are discussed. The solution based on J2ME/J2EE and its prospective are presented.

Key words: Wireless Location, Geographic Information Service, Java, Mobile Terminal

摘要： 本文阐述了基于Java的移动地理信息服务出现的背景和定义。在详细分析移动地理信息服务当前解决方案的基础上，提出了包括表现层、接入层、网关、移动运营商平台和定位平台、服务提供商平台、GIS服务层以及数据层的移动地理信息服务的七层体系结构，并分别对每层功能作了进行了阐述。分析了适于移动地理信息服务的无线定位、服务端地图缓冲、空间数据的多尺度表达以及面向移动终端的空间数据模型四种关键技术，并提出了具体解决方案。实现了移动地理信息服务基于J2ME和J2EE解决方案及给出具体实例,并分析了其应用前景。

关键词: 无线定位, 地理信息服务, Java, 移动终端