An automatic aggregation method of spatial science data metadata for global change research

A space science, global change technology, applied in the field of global change research and information technology, to achieve the effect of solving the problem of automatic aggregation of metadata

Active Publication Date: 2011-12-21
COMP NETWORK INFORMATION CENT CHINESE ACADEMY OF SCI
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Problems solved by technology

[0006] In view of the above-mentioned problem that requires automatic aggregation of global change space science data metadata resources, th

Method used

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  • An automatic aggregation method of spatial science data metadata for global change research
  • An automatic aggregation method of spatial science data metadata for global change research
  • An automatic aggregation method of spatial science data metadata for global change research

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Embodiment Construction

[0032] The implementation of the present invention will be described below by taking landsat data as an example.

[0033] First, organize the address of the data website for the specific data source that needs to be aggregated (for example, the address of landsat’s data website is http: / / glovis.usgs.gov / ) and the type of data product that needs to be aggregated (such as LANDSAT-7 SLC_off).

[0034] Next, the server generates a list of potentially valid data product ids based on the landsat data product type, year, and number of days. The landsat data product id is a string in the format: LXSPPPRRRRYYYYDDDGSIVV, where the meaning of each bit is:

[0035] L- indicates Landsat data.

[0036] X- indicates the product type (M for MSS, T for TM, E for ETM+).

[0037] S- means satellite (1, 2, 3, 4, 5, 7).

[0038] PPP-Indicates WRS channel. The global range is 001-251, and the Chinese range is 114-151.

[0039] RRR - Indicates the WRS column. The global range is 001-248, and th...

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Abstract

The invention discloses a method for automatically gathering metadata of space science data facing a global change research and belongs to the technical field of information. The method comprises the following steps of: 1) selecting a data source, and regularly accessing the data source by a server to generate a download list and a download task; 2) accessing a data source server according to thecurrent download list and the download task to download a metadata file, and storing the metadata file to the server; 3) checking the quality of the downloaded metadata file, extracting a metadata item from the qualified metadata file, and calculating and converting; 4) storing a metadata file route and the metadata item into a metadata item database, and establishing an index; and 5) establishing a one-to-one corresponding mapping relation among the metadata file, the data of the metadata item database and the index data according to the file route, an id value of the metadata item database and an id value of an index item. By the method, massive global change space science data metadata resources which are distributed around the world can be queried in a one-stop manner.

Description

technical field [0001] The invention belongs to the fields of information technology and global change research, in particular to a method for automatically gathering metadata of distributed, multi-source and heterogeneous spatial scientific data by using information technology in the field of global change-oriented research. Background technique [0002] With the negative impact of global change becoming more and more serious and global environmental problems becoming more and more prominent, the research on global change is receiving unprecedented attention. This can be seen from the four major global environmental change research programs launched successively by international scientific organizations such as the International Council of Scientific Unions (ICSU): the World Climate Research Program (WCRP) was launched in 1980, and the International Geosphere-Biosphere Program (IGBP) was launched in 1987. IGBP), launched the Biodiversity Program (DIVERSITAS) in 1991, and la...

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Application Information

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IPC IPC(8): G06F17/30
Inventor 杨风雷林青慧黎建辉沈志宏胡良霖周园春
Owner COMP NETWORK INFORMATION CENT CHINESE ACADEMY OF SCI
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