中文摘要：

针对移动GIS应用中无线互联网络的带宽限制、非对称、不稳定等问题,采用了移动智能体（Mobile Agent）分布式计算理论与方法,提出了一种基于Mobile Agent的移动GIS模型。该模型集成Mobile Agent、GPS、CDMA、TCP/IP、UDP等方法与技术,可以进行空间信息的移动计算、移动目标的实时监控、空间信息的实时采集与无线传输等,并且该模型从底层初步构建了Mobile Agent运行环境、移动GIS应用服务器、移动GIS客户端和服务器等模块。利用该模型在上海某区消防网格化调查与维护应用中进行了试验,结果表明所提出的模型与方法在无线互联网络环境下具有较好的灵活性和实用性。

英文摘要：

A new implementing method of mobile geographic information system （GIS） is studied based on personal digital assistant （PDA）. Key technologies are presented in the method, including mobile agent （MA） distributed computing, global positioning system （GPS）, code division multiple access （CDMA）, transfer control protocol/internet protocol （TCP/IP）, and user datagram protocol （UDP）. In view of the narrow bandwidth and instability of the wireless internet, a new mobile GIS model based on mobile agent is further proposed, which provides spatial information mobile computing, realtime monitoring of mobile target, realtime gathering and wireless transferring of spatial information. The mobile agent runtime environment, mobile GIS application server, mobile GIS client and server are built authorship by visual c＋＋ and embedded visual c＋＋. A field test of fire control gridding and maintenance is carried out with this model in Shanghai, and the results show that the proposed model and methods are feasible for mobile GIS.