对系统用户特征和系统功能性需求进行了分析,并在系统需求分析的基础上提出了系统的总体设计框架,最后对多源数据的融合以及专题地图的动态生成等系统实现的关键技术进行了探讨.%The paper analyzed the users' characteristics and functional requirements of system, then set forth the framework of general system design,and lastly discussed the key technologies in the system implementation such as merging of multi-source data and dynamic creation of a thematic map.
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