City Geographic Information System Applied Research

This article has studied in the related technology of the urban geographic information system application.Discussed the goal, the principle and the content of the urban geographic information system. Has studied the network and the software platform construction of the data exchange center of city geographic information system. Has produced the data exchange center interior logic structure drawing, Proposed the sandwich construction unifies mixed style system structure:the fat client/Server (C/S) two structures and thin client (browser)/Intermediate level/Server (B/S). Has carried on the discussion to the software realization technology. Has produced the data exchange center and the application system relations; To the data exchange center logical organization, the network deployed, the software platform construction as well as the subsystem turned on the way to conduct the research.Has discussed the public foundation data and the space model data design, proposed divides the GIS platform management data object into the public foundation database, the specialized sharing database, the work database three big kinds, has studied the public foundation database frame, the principle of design, the lamination design thought, the DEM data set and the phantom data set design, the number with emphasis constructs the storehouse according to the design as well as the vector data and the phantom data.Has discussed GIS in the flood prevention decision support system application and the development, proposed based on the model storehouse flood prevention decision support system three systems structure, to needed the spatial data, the attribute data, the image data based on the GIS flood prevention decision support system carries on has discussed and proposes its database realization way. Has discussed based on the GIS city emergency command system essential technology, has conducted the research to its system structure and the composition, proposed the emergency command system by the application system, the data and the database, supports the platform, the standard and the connection, the systematic security and so on five parts is composed, application system including the emergency direction dispatch system, the leader assistance decision system, based on the WEB GIS emergency information issued the system, 110/119/120/122 system and so on compose Studied the emergency command system data composition, the connection has designed and supports the platform.Has discussed GIS in the digital community's application.Finally proposed the Guiyang geographic information system construction pattern.