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A grid retrieval method and device

A technology of grid and grid graph, which is applied in the direction of digital data information retrieval, still image data retrieval, still image data indexing, etc., can solve the problems of inability to quickly retrieve remote sensing image data, and achieve the effect of increasing speed

Active Publication Date: 2021-05-07
北京国星宇航科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, this application provides a grid retrieval method and device to solve the problem that the remote sensing image data cannot be quickly retrieved in the prior art

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  • A grid retrieval method and device
  • A grid retrieval method and device

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Embodiment Construction

[0073] In order to make the above objects, features and advantages of the present application more obvious and understandable, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0074] In the embodiment of this application, it can be divided into two parts: grid index and grid retrieval. Grid index refers to determining which grid in the queried level grid the index rectangle belongs to. Grid retrieval refers to determining the retrieval range matrix Intersect those meshes.

[0075] For ease of understanding, the grids at all levels in the spatial grid system are described first.

[0076] In the embodiment of this application, a set of spatial grid system can be established first, and the spatial grid system can include 2 n Level grid, n is an integer greater than 3.

[0077] see figure 1 As shown, in the first way to establish a spatial grid system, in the...

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Abstract

This application discloses a method and device for grid retrieval. In this application, a new coordinate system is firstly provided, that is, the start and end point coordinate system, and a rectangle can be mapped to the start and end point coordinate system to form two points. In this application The grid retrieval method provided by the application can map each grid of each level in the spatial grid system to the starting and ending point coordinate system in the first dimension and the second dimension respectively, then the first dimension grid map generated and Geographic grids can be represented by points in the second-dimensional grid diagram. Similarly, the index rectangle or the retrieval range matrix can be mapped to the starting and ending point coordinate system on the first dimension and the second dimension respectively, so that the index rectangle Or the comparison between the retrieval range matrix and the grid can be converted from the comparison between rectangles to the comparison between points and lines, which greatly improves the speed of grid indexing and retrieval.

Description

technical field [0001] This application relates to the technical field of remote sensing image processing, in particular to a grid retrieval method and device. Background technique [0002] With the rapid development of remote sensing image acquisition methods, the era of remote sensing big data has come. Remote sensing images generally refer to satellite remote sensing images and aerial photography images, which have the characteristics of huge amount of data, complex and diverse data formats and coordinate systems. The current remote sensing image data is based on the file organization mode of strips, map frames, bands, etc. In this mode, the remote sensing image data cannot be quickly retrieved, and it takes a long time and tedious processing to continuously browse, which severely limits the application of remote sensing image data. As a result, the due value of remote sensing image data cannot be reflected and mined. [0003] Therefore, how to realize the rapid retriev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F16/583G06F16/51G06T17/20
CPCG06T17/20G06F16/51G06F16/583
Inventor 李振宇柳益民代雪峰周青王成龙郑承迅
Owner 北京国星宇航科技有限公司