Data organization requires high efficiency for large amount of data applied in the digital mine system. A new method of storing massive data of block model is proposed to meet the characteristics of the database, incl...Data organization requires high efficiency for large amount of data applied in the digital mine system. A new method of storing massive data of block model is proposed to meet the characteristics of the database, including ACID-compliant, concurrency support, data sharing, and efficient access. Each block model is organized by linear octree, stored in LMDB（lightning memory-mapped database）. Geological attribute can be queried at any point of 3D space by comparison algorithm of location code and conversion algorithm from address code of geometry space to location code of storage. The performance and robustness of querying geological attribute at 3D spatial region are enhanced greatly by the transformation from 3D to 2D and the method of 2D grid scanning to screen the inner and outer points. Experimental results showed that this method can access the massive data of block model, meeting the database characteristics. The method with LMDB is at least 3 times faster than that with etree, especially when it is used to read. In addition, the larger the amount of data is processed, the more efficient the method would be.展开更多
The development of spatio-temporal data model is introduced.According to the soil characteristic of reclamation land,we adopt the base state with amendments model of multi-layer raster to organize the spatio-temporal ...The development of spatio-temporal data model is introduced.According to the soil characteristic of reclamation land,we adopt the base state with amendments model of multi-layer raster to organize the spatio-temporal data,using the combined data structure on linear quadtree and linear octree to code.The advantage of this model is that it can easily obtain the information of certain layer and integratedly analyze the data with other methods.Then,the methods of obtain and analyses are introduced.The method can provide a tool for the research of the soil characteristic change and spatial distribution in reclamation land.展开更多
基金Projects(41572317,51374242)supported by the National Natural Science Foundation of ChinaProject(2015CX005)supported by the Innovation Driven Plan of Central South University,China
文摘Data organization requires high efficiency for large amount of data applied in the digital mine system. A new method of storing massive data of block model is proposed to meet the characteristics of the database, including ACID-compliant, concurrency support, data sharing, and efficient access. Each block model is organized by linear octree, stored in LMDB（lightning memory-mapped database）. Geological attribute can be queried at any point of 3D space by comparison algorithm of location code and conversion algorithm from address code of geometry space to location code of storage. The performance and robustness of querying geological attribute at 3D spatial region are enhanced greatly by the transformation from 3D to 2D and the method of 2D grid scanning to screen the inner and outer points. Experimental results showed that this method can access the massive data of block model, meeting the database characteristics. The method with LMDB is at least 3 times faster than that with etree, especially when it is used to read. In addition, the larger the amount of data is processed, the more efficient the method would be.
文摘The development of spatio-temporal data model is introduced.According to the soil characteristic of reclamation land,we adopt the base state with amendments model of multi-layer raster to organize the spatio-temporal data,using the combined data structure on linear quadtree and linear octree to code.The advantage of this model is that it can easily obtain the information of certain layer and integratedly analyze the data with other methods.Then,the methods of obtain and analyses are introduced.The method can provide a tool for the research of the soil characteristic change and spatial distribution in reclamation land.
