網(wǎng)格計算環(huán)境下GML空間分析關(guān)鍵技術(shù)研究
[Abstract]:GML is an international standard for spatial data coding, transmission, storage and distribution. The emergence of GML provides a unified standard and framework for GIS spatial data modeling, integration and sharing. With the emergence of large numbers of spatial data in GML format, the single machine environment has been unable to adapt to the needs of these massive, semi-structured GML data organization and management. It is urgent to study the technology of effective organization and management of GML data. The powerful computing and data management ability of grid computing environment provides an effective and intelligent solution for the organization and management of massive data. Therefore, how to process GML data in high performance parallel computing in grid computing environment is the original intention. Based on the theory of GML spatial analysis in a single computer, this paper studies the key problems of GML spatial analysis in grid computing environment, including the following aspects: (1) topological representation and editing of GML spatial data. According to the characteristics of GML semi-structured data, the topological representation method of basic primitive is proposed, and the topological editing of GML is explained from the expression of points, lines and surfaces. Finally, the topology editing of GML is realized in AE (ArcGIS Engine). (2) Research on GML parallel spatial analysis task scheduling in grid computing environment. Considering the characteristics of GML data, a GML data partition strategy based on Hilbert space filling curve is proposed to partition GML data, and the parallel query of GML data is realized in grid environment. Based on grid computing scheduling model and algorithm and load balancing problem, a task scheduling strategy for GML parallel space analysis is designed. (3) parallel computing of GML space analysis in grid computing environment. In order to improve the efficiency of parallel computing, the distributed parallel computing based on grid environment is studied, and the parallel computing model, algorithm and strategy based on grid are proposed, and the parallel algorithm of GML spatial analysis is proposed for different problems of spatial analysis. (4) performance verification of GML spatial analysis in grid computing environment. Based on the grid computing platform Globus Toolkit, the parallel computing flow of GML space analysis is designed to test the efficiency of GML spatial analysis parallel computing in grid computing environment. It is concluded that the efficiency of spatial analysis of massive GML data in grid computing environment is better than that in single computer environment. Finally, through the in-depth study of GML spatial analysis in grid computing environment, the interoperability of GML in grid computing environment is realized, and the GIS application system in grid computing environment is further enriched and improved.
【學(xué)位授予單位】:江西理工大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2012
【分類號】:P208;TP338.6
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