Database-oriented GIS (Geographic Information System) client data interface implementation method and data access method

The invention discloses a database-oriented GIS (Geographic Information System) client data interface implementation method and a data access method. The database-oriented GIS client data interface implementation method adopts IIS (Internet information service) as GIS platform service to serve as user database conversion service for converting the data called by a client into the standard XML (Extensible Markup Language) format and transmitting the data to the client. By means of the methods, developers can directly access a user database in the client and integrate the user database into the GIS, so that the access speed is greatly increased, moreover, aimed at specific industries, such as power transmission and distribution, the invention provides specialized calling interfaces, and consequently, while the access speed is increased, the mass data of enterprises can be more rapidly processed.