The WebGIS development has some own limits by the map servers of ArcGIS Sever or SuperMapiServer, which causes that the map server cannot be customized flexibly. We used the information exchange based on XML to construct own map servers, and proposed the general design of the map servers for realizing the function models, such as Socket correspondence, XML analysis, map object pool, multithread processing, core GIS processing and so on. The article realizes to customize the map services flexibly to develop WebGIS by using XML information exchange.
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