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Storage method and reading method for mass tile data
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A data storage and data technology, applied in the field of data processing, can solve the problems of difficult attribute data organization, large storage space, and long response time for massive data transfer, so as to reduce storage and reading time, high-speed migration, and improve Effects of I/O Processing Efficiency
Inactive Publication Date: 2013-11-27
SATELLITE SURVEYING & MAPPING APPL CENTSASMAC NAT ADMINISTATION OF SURVEYING MAPPING & GEOINFORMATION OF CHINANASG
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This results in defects such as large data storage, difficult query and retrieval, long response time for massive data transfer, and difficult attribute data organization.
The management method of the spatial database adopts the pyramid data organization form, and stores massive satellite images and topographical data in large spatial databases such as SQLServer and Oracle, which makes the scientific data organization, data retrieval and transfer speed, etc. improved to a certain extent. , but due to the shortcomings of the above-mentioned large-scale spatial databases such as data redundancy, large storage space, and difficult data migration, it still cannot meet the requirements for massive data storage and reading.
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Embodiment 1
[0033] see figure 1 , Embodiment 1 of the present invention provides a method for storing massive tile data (that is, a data modeling method), including the following steps:
[0034] Step S100, according to the attribute information of the tile data to be stored, obtain the hierarchical information of the tile data; generate the data blocks of the primary index file according to the hierarchical information of the tile data;
[0035] Step S200, further divide the data block of the first-level index file into data grids to obtain the position coordinates of each cell in the data block; generate the corresponding tile data according to the position coordinates and block information secondary index file;
[0036] Step S300, storing tile data in a preset file in a first-come, first-served manner;
[0037] Step S400: Store the corresponding generated primary index file and secondary index file each time the target tile data is stored and written.
[0038] Wherein, the preset fil...
Embodiment 2
[0067] see Figure 5 , Embodiment 2 of the present invention also provides a method for reading massive tile data, including the following steps:
[0068] Step S600, receiving the reading request information of the target tile data;
[0069] Step S700, according to the read request information of the target tile data, determine the primary index value of the primary index file corresponding to the target tile data; find the data block to which the target tile data belongs according to the primary index file storage location;
[0070] Step S800, determine the secondary index value of the secondary index file according to the primary index value; determine the initial storage location and data length of the target tile data in the preset file according to the secondary index value of the secondary index file;
[0071] Step S900, performing a read operation on the target tile data according to the storage location of the target tile data.
[0072] In the second implementation ...
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Abstract
The invention discloses a storage method and a reading method for mass tile data. The storage method comprises the following steps: generating a data block of a primary index file according to hierarchy information of acquired tile data; further partitioning the data block of the primary index file into data grids to obtain the position coordinate of each unit grid in the data block; generating a secondary index file which corresponds to the tile data according to the position coordinate and blocking information; storing the tile data according to a first-in-first-storage way; storing the primary index file and the secondary index file which are generated correspondingly every time target tile data are stored and written in. According to the storage method and the reading method for mass tile data provided by the invention, a hierarchy and blocking access strategy is adopted, so that the storage position of tile data can be described accurately, scientific organization of data structures and data storage space are guaranteed, storage, reading and writing of super large volume of data are supported, the I / O (Input / Output) processing efficiency of data files is increased, and the data retrieval time is reduced greatly.
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IPC IPC(8): G06F17/30
Inventor 雷兵甘宇航胡轶之徐畅张晓田林刘克
Owner SATELLITE SURVEYING & MAPPING APPL CENTSASMAC NAT ADMINISTATION OF SURVEYING MAPPING & GEOINFORMATION OF CHINANASG
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