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Remote sensing image metadata-based storage method, retrieval method, equipment and medium

A remote sensing image and metadata technology, which is applied in still image data retrieval, metadata still image retrieval, still image data indexing, etc. , delete the problem of long response time of mobile operations, and achieve the effect of solving low query efficiency, narrowing the retrieval scope, and improving the response time too long.

Pending Publication Date: 2021-11-30
中科星通(廊坊)信息技术有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. At present, the amount of original remote sensing image data is large, and the utilization rate is low
[0006] 2. The traditional method of storing remote sensing image metadata in a single table is faced with the data storage and management of super large data tables in the context of millions or even tens of millions of original image data, and there is deletion of old data The long response time of mobile operations and low retrieval efficiency when searching in large areas or complex conditions will seriously affect the storage management efficiency and query efficiency of remote sensing image metadata
[0007] 3. Traditional remote sensing image data retrieval methods In the context of massive remote sensing image data, querying large tables of metadata will cause the data table to respond too long, thus affecting the retrieval efficiency of original image data

Method used

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  • Remote sensing image metadata-based storage method, retrieval method, equipment and medium
  • Remote sensing image metadata-based storage method, retrieval method, equipment and medium
  • Remote sensing image metadata-based storage method, retrieval method, equipment and medium

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Experimental program
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Effect test

Embodiment 1

[0048] Please refer to image 3 , this embodiment provides a storage method based on remote sensing image metadata, the metadata includes several feature data of remote sensing images; the method includes:

[0049] S10: Create a metadata storage table;

[0050] According to the metadata information of the original remote sensing image data, create a data table about the attributes of these metadata information, and set the auto-increment ID as the primary key.

[0051] For example, the database table dataTableA contains 1 million pieces of data information, and the auto-increment ID of the database table is the data attribute information automatically arranged according to the sequence of inserted data. If there is a deletion operation on the data during the data insertion process, the auto-increment ID of the data will not be dynamically updated, and the deleted data auto-increment ID will be vacant. For example: 1 million pieces of data, delete the data whose auto-incremen...

Embodiment 2

[0115] On the basis of embodiment 1, this embodiment also includes the following steps:

[0116] S51: Using the second characteristic data as the secondary partition key, divide each of the primary metadata partitions into several secondary metadata partitions; in this embodiment, the second characteristic data is a sensor type.

[0117] Correspondingly, when inserting new metadata, execute according to the following steps:

[0118] S52: extracting second feature data from the inserted metadata;

[0119] S53: Determine the corresponding secondary metadata partition in the determined primary metadata partition according to the second feature data of the remote sensing image metadata;

[0120] S54: Store the inserted metadata, that is, the corresponding auto-increment ID, into the corresponding secondary metadata partition.

[0121] For example, based on the metadata storage table in Table 3 above, for example, when it is necessary to insert a piece of metadata information: sa...

Embodiment 3

[0127] Corresponding to Embodiment 2, this embodiment provides a remote sensing image metadata retrieval method based on the above storage method, including the following steps:

[0128] Sa: obtain the query condition, the query condition includes several retrieval fields corresponding to the characteristic data;

[0129] Users can extract search conditions such as image start time, satellite type, sensor type, target area, and cloud cover percentage according to their needs.

[0130] For example, the query condition input by the user is GF1, PMS1; the search method is organized according to the query condition. Splicing and organizing query statements according to the retrieval conditions: select*from tableName where'satellite'='GF1'and'sensor'='PMS1'.

[0131] Sb: When judging that the retrieval field contains the first feature data and is within the partition range of the metadata storage table, determine the first-level metadata partition corresponding to the query condit...

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Abstract

The invention discloses a remote sensing image metadata-based storage method, a retrieval method, equipment and a medium. The metadata comprises a plurality of feature data of the remote sensing image. The storage method comprises the following steps: creating a metadata storage table; dividing the metadata storage table into a plurality of first-level metadata partitions by taking the first feature data as a first-level partition key; each first-level metadata partition has the same partition granularity; and establishing an index of the feature data. According to the method and the device, the storage of the remote sensing metadata is classified according to the first feature and is subjected to primary partition storage, so that when the data is managed, the data area can be locked firstly, and the application of the table partition technology directly positions the storage management, deletion, movement and other management operations of the existing data to the metadata storage area; The problem that the response time is too long when database management operation is carried out in a traditional database storage management mode is solved. The management efficiency is improved.

Description

technical field [0001] The present disclosure generally relates to the technical field of data storage, and in particular to a storage method, retrieval method, device and medium based on remote sensing image metadata. Background technique [0002] With the rapid development of satellite remote sensing technology, the achievements of my country's aerospace industry system have become increasingly prominent, and a complete range of communication, navigation, remote sensing and other satellite systems have been built, forming a military and civilian application system with a certain scale. At present, my country's earth observation remote sensing satellites are launched intensively, and the collected satellite remote sensing images are transmitted to the ground exponentically. Only the high-resolution series of satellite remote sensing image data has reached millions or even tens of millions. It can be seen that the data volume of Gaofen series satellite remote sensing images ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/51G06F16/58G06F16/587
CPCG06F16/51G06F16/58G06F16/587
Inventor 杨静静王栋黄祥志余涛王更科赵亚萌臧文乾
Owner 中科星通(廊坊)信息技术有限公司