The Research Of Distributed Management Technology Of Urban Spatial Data

With the rapid development of 3S (GIS, GPS, RS) technology, the urban spatial data is also growing with the unprecedented speed. How to manage sea-large urban spatial data effectively and to realize the data sharing to provide an urban infrastructure geographical information platform for the society is a key problem during the construction of "Digital City" . The development of network and distributed database present a new solution for the management of urban spatial data.After researching on the status quo of managing modes of urban spatial data and distributed spatial database, this paper firstly analyses the characteristics of data managing modes and future trends. The author deems that relational spatial data managing mode based on the spatial data engine is the most mature mode in GIS, and object-oriented data managing, distributed data managing and spatial data warehouse are the development trends. Then the paper explores the characteristics, design principles and target of distributed database. The paper also presents a managing mode of incorporating multi databases into one to manage urban spatial data distributed through combing spatial data engine with distributed database. After analyzing characteristics of urban spatial data, this paper partly implements the integration of spatial data of multi sources and organization and management of sea-large spatial data. Finally, the spatial data managing system makes a uniform management, maintenance and updating on such data as digital linear graphic, digital elevation map, digital orthoimage, digital raster data, reference points and metadata.Based on the above theory and technology of distributed spatial data management, Xining Distributed Spatial Database Managing System is devised and developed. The system has been applied in Xining City, which validates the paper.