| GIS (Geographic Information System) is the extremely popular research topic recently. On the one hand, it must present the geography information through the virtual reality technology; on the other hand, it must have the geography information data which expresses the correct geography information.GIS is an key technology related to the national development and the national production and life, which has the vital role in the global change dynamic monitor, the national foundation industry, the urban construction, the enterprise, the trade, the military and the project construction and so on.The topic of this paper is the GIS second aspect-how the data is constructed to express geography information. By one kind of new pattern proposed in this paper, Adding XML between the customer end and the information server, the information server and the database respectively, unifying visit form, causes the mutual independence between the customer end and the information server, the information server and the database respectively, thus enhancing the extension of the system and making it easy to add additional information. |
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