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The meteorological network database for Qinghai is based on the B/S structure and developed with the “.NET” platform. The system consists of meteorological database, management website, and spatial information platform. The functions of this system include automatic data storage, base map rendering, data query and statistics, graphic plotting， and so on. The system is convenient to display query results on the electronic map, has been put to operational use at the Qinghai Meteorological Observatory since 2009. It enhanced the data sharing capability and improved the services of the Qinghai Meteorological Observatory. SharpMap is used to provide the WebGIS function and advanced technologies such as Ajax， to increase the system efficiency.