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Data storage and search method based on numerical indexing of spatial data

A technology for spatial data and data storage, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as slow speed and poor retrieval performance, and achieve the effect of reducing speed and consumption.

Active Publication Date: 2013-04-03
COMP NETWORK INFORMATION CENT CHINESE ACADEMY OF SCI
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AI Technical Summary

Problems solved by technology

At present, the spatial data retrieval service based on the above-mentioned spatial data index, because the numerical value of the spatial index structure adopted by it is relatively slow, the retrieval performance is poor when the retrieval of spatial data with many coordinate points representing the position

Method used

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  • Data storage and search method based on numerical indexing of spatial data
  • Data storage and search method based on numerical indexing of spatial data
  • Data storage and search method based on numerical indexing of spatial data

Examples

Experimental program
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Embodiment Construction

[0062] The following takes the mod091 data product as an example to illustrate the process of indexing and retrieval services:

[0063] 1. Capture storage space data (such as Figure 5 shown)

[0064] The process of grabbing, parsing and storing mod091 data is as follows:

[0065] 1. Visit the website http: / / earthexplorer.usgs.gov / , select the product mod091 in the tab page Data set on the home page, set the search space range in the tab page path / row, and click the Results button to obtain the product mod091 Data page.

[0066] 2. The data information in the extraction page includes data id, maximum longitude, minimum longitude, maximum latitude, minimum latitude, center longitude, center latitude, average cloud cover, and start date.

[0067] 3. Insert all the extracted mod09a1 data into the data table mod09a1_metadata corresponding to the mod09a1 product (one product corresponds to one data table), and add the storage time for each record, which is used when generating t...

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Abstract

The invention discloses a data storage and search method based on numerical indexing of spatial data. The data storage and search method comprises the steps as follows: 1) automatically acquiring a page with the spatial data from the internet, analyzing and storing in a database; 2) selecting properties to be indexed from the database, converting the non-numerical type properties in the database into corresponding numerical values, and storing; 3) carrying out classified indexing on the spatial data according to spatial data types, creating a numerical indexing file for a data table of each data product, taking the numerical indexing file as a main index, creating an increment index according to the set time cycle, and periodically combining the increment index with the main index, wherein the numerical indexing file comprises an indexed property and inverted file mapping table and a plurality of numerical document inverted lists; 4) deploying the indexes to a search service end; and 5) searching the data table by the search service end according to a received search request. According to the data storage and search method, the search speed is increased, and incremental indexing is supported.

Description

technical field [0001] The invention relates to a data storage and retrieval method based on a spatial data numerical index, and is especially suitable for the establishment and retrieval of a numerical attribute index in spatial data, and relates to the field of spatial data retrieval services. Background technique [0002] With the rapid development of spatial data technology and Internet technology, the explosive growth of spatial data collection, Internet-related services based on spatial data have flourished from scratch, and are playing an increasingly important role in the research fields of related disciplines. role. [0003] In the service based on spatial data, the retrieval of spatial data is a basic service, and it is the main way for users to locate and obtain data. In the face of a large amount of collected spatial data, it is necessary to establish a suitable spatial data index to improve the retrieval speed, and provide a stable and reliable incremental inde...

Claims

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Application Information

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IPC IPC(8): G06F17/30
Inventor 李晓东黎建辉杨风雷沈志宏刘峰
Owner COMP NETWORK INFORMATION CENT CHINESE ACADEMY OF SCI
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