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Global change research-oriented automatic space science data gathering method

A space science and global change technology, applied in the fields of information technology and global change research, can solve problems such as methods and platforms that have not yet been discovered, and achieve the effect of solving the problem of automatic data aggregation

Active Publication Date: 2011-11-23
COMP NETWORK INFORMATION CENT CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After searching the literature, no methods and platforms that can solve the above problems have been found so far

Method used

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  • Global change research-oriented automatic space science data gathering method
  • Global change research-oriented automatic space science data gathering method
  • Global change research-oriented automatic space science data gathering method

Examples

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Embodiment Construction

[0036] The implementation of the present invention will be described below by taking landsat data as an example.

[0037] First, sort out 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-7SLC_off).

[0038]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:

[0039] L- indicates Landsat data.

[0040] X- indicates the product type (M for MSS, T for TM, E for ETM+).

[0041] S- means satellite (1, 2, 3, 4, 5, 7).

[0042] PPP-Indicates WRS channel. The global range is 001-251, and the Chinese range is 114-151.

[0043] RRR - Indicates the WRS column. The global range is 001-248, and the ...

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Abstract

The invention discloses a global change research-oriented automatic space science data gathering method, belonging to the field of information technologies. The method comprises the steps of: (1) periodically accessing data sources and generating downloading tasks by a server; (2) according to current downloading tasks, downloading metadata files and storing in the server and carrying out qualityinspection, metadata item extraction, computation and conversion on the downloaded files; (3) storing metadata file routes and metadata items in a metadata item database and setting up indexes; (4) setting up a mapping relation among the metadata files, metadata item database data and index data and providing a retrieving interface; and (5) querying whether solid data to be queried exists or not according to a querying condition by the server, if not, generating a solid data downloading task to download according to a data reservation application and carrying out the quality inspection and metadata item updating on the downloaded data. The method can be used for querying and acquiring mass global change space science data resources which are distributed at all parts of the world in a single-stop-type 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 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 launched the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 黎建辉杨风雷林青慧沈志宏胡良霖周园春
Owner COMP NETWORK INFORMATION CENT CHINESE ACADEMY OF SCI
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