| Nowadays,Digital City has been in full swing in the various provinces and cities across the country,Digital City is not only to promote city informatization construction, more importantly, fundamentally promote more and more cities to set up their own urban basic geographic information database, geo-information public platform data sets are expended based on them, and set up geo-information public platform. In order to ensure that geo-information public platform data sets presents potential, it is necessary to maintain and update dynamic. Judging from the current situation in our country, geo-information public platform data sets updation is based on urban basic geographic information database updation, period and process of obtaining urban infrastructure geographical information have certain standards, it can be better able to achieve the infrastructure geographic information updation, which can basically meet public.However, with the acceleration of urban construction, urban infrastructure geographical information changes faster and faster, public demands present potential of geo-information public platform data has become increasingly. Conventional basic geographic information updation technology obviously can not meet the needs of users because of its lower efficiency, So it is more important that the new urban basic geographic information city can be updated to geo-information public platform data sets quickly and used in urban informatization construction, finding a good solution to geo-information public platform data sets updation low efficiency. This paper aimed at achieving geo-information public platform data sets online updation via analyzing the shortcomings of the domestic geo-information public platform data sets updation, and studying foreign geographic information online updation advanced technology and their key technologies, The contents of this paper are as follows:(1) Studying the realization principle of geographic information online editing, Define that the realization process of geographic information online editing combining with effects and advantages of it.(2) Studying popular Temporal data model, analyzing and comparing with each other, putting forward a temporal data model, which is combined with "continuous photos" and "modify by basic" according to the actual situation of this paper, solving temporal data model design of data source repository. (3) Designing the structure of data source repository, dividing the data source repository into status library, historical library and intermediate library, describing the relationship between the three libraries.(4) Sorting out the updation ideas, updation methods and historical backtracking mechanism for the three data sources combined with the actual situation of the three sources data via using the mode of geographic information changing and regional geographic information updation principle as a guide.Via studying the above contents in depth, designing the achievment process of geographic information online editing, ensure the whole design of the vector repository, put forward updated methods and historical backtracking mechanism for the three data sources, and develop geographic information online update system, verify the feasibility of the geographic information online updation methods proposed by the paper. |
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