The Design And Implementation Of Dynamicup Dating Technology Of Map Data

Nowadays, digital city has been in full swing in the national various provinces and municipalities to carry out, digital city will not only promote the construction of the city information, more important is fundamentally promote more and more cities have set up basic geographic information database, and as a data base extension geographic information public platform for data collection, set up geographic information public platform, in order to ensure that the geographic information public platform processing. Along data sets, it is necessary to carry on the dynamic maintenance and update.From the point of the current situation in our country, the geographic information public platform update of data set is based on the urban basic geographic information database update and update, the city’s basic geographic information acquisition cycle and the process has a certain standard, can better realize the basic geographic information update, basic can satisfy the application of the public. But with the speeding up of the urban construction, urban basic geographic information change is becoming more and more fast, the public urban geographic information public platform data processing. Along demand is higher and higher, the regular basic geographic information update technology because of its low obviously unable to meet the needs of users, so quickly to a new urban basic geographic information update to the urban geographic information public platform of data set and applied to the construction of city information, very good solution to urban geographic information public platform data set to update the timeliness of problem is the research emphasis in this paper. By analyzing the disadvantages of domestic geographic information public platform update data sets, and study the foreign advanced geographic information online update technology and the key technologies involved, to achieve geographic information public platform for data collection online updates.The content of the study are as follows:(1) Study the principle of geographic information online editing and combining its function and advantages, the implementation of geographic information online editing process is determined.(2) The time and space of several common data model, compared and analyzed, according to the actual situation, this paper proposes a combination of "snapshot" continuously and spatio-temporal data model of "ground state correction", has solved the data repository model design of space and time.(3) The design of data repository architecture, data source repository is divided into current situation, history and middle library, library and expounds the relationship between the three libraries.(4) To change patterns of geographic information updated and regional principle as the guidance, combined with the actual situation of three kinds of data sources, sort out for three kinds of data updating ideas, and put forward the three methods of data updates and historical back mechanism.Through the in-depth study of the above content, this paper puts forward the design of the geographic information online editing process, determine the overall design of vector repository, is put forward in view of the three methods of data updates and history back mechanism, and thus developed a geographic information update system online, to verify the proposed in this paper the feasibility of the method of geographic information update online.