The Data Organization And Application Systems Development Of Basic Geographic Cities Conditions Monitoring

Geographic cities conditions monitoring is part of the geographical situation monitoring, the basic geographic cities monitoring database is an important content of cities general investigation work, which there are the multi-source, massive, multi-scale and multi-temporal characteristics. If these data could be organized reasonably and managed effectively, it will be helpful to organize and manage the basic geographic cities conditions data, and build the basic geographical cities conditions monitoring database, which can establish fundamental data for the geographical cities monitoring service, and strengthen the service function of digital cities.Basic geographic cities conditions monitoring database includes topography database, land cover database, the geographical boundaries database. In this paper, data contents, data characteristics and relationship between different types of data were analyzed. Relationship among Basic city geographic conditions monitoring database、Basic geographic information database and digital city geospatial framework database was initially established. And application service overall structure of Basic city geographic conditions monitoring based on Digital City was designed.The associations and matching of multiple version geographical cities monitoring data is the key technical problems of basic geographical cities monitoring database data organization and management. Research the matching technology between multiple versions elements from coarse and fine two aspects. Version data will mapped to a uniform grid according to certain rules, To achieve multiple version elements coarse matching by the grid connection, analysis the effect of mesh size on the coarse matching accuracy, Study the determination method of the optimal grid cell. Analysis the matching methods of multiple version basic geographical city monitoring elements respectively from three aspects as dot, line, surface, judge the coarse matching result, achieve fine match of elements. For example, a certain area multiple version resident elements for example, through the coarse matching and fine matching processing, established relationship between the multiple version resident elements, combined with the application, extract the change information through the multiple version resident elements, Verify the elements associate and matching method.Based on the study of the basic geographic cities monitoring database content, characteristics, data relationship, construct the basic geographical cities monitoring database structure, construct the basic geographic cities monitoring database with the application of geodatabase.The basic geographical cities monitoring application system has carried on the overall design, gave out application system structure and development technique route. Develop the basic geographic cities monitoring application system in ArcGIS environment with the application of the ArcGIS Engine, Realize database management, data loading, eagle eye display functions, etc, and realize the basic geographical city surveillance data query and statistical functions.Paper studied organization and management the geographic cities monitoring data of the local database and development application system from geographical cities monitoring data content, characteristics, background database, multiple versions of the data relationship, relevance and match, basic geographic cities monitoring database and application system. Geographical conditions census has certain reference value.