Image tile map service method based on triple bidirectional index and optimized cache

Abstract

The invention discloses an image tile map service method based on triple bidirectional index and optimized cache, and relates to the field of remote sensing image organization management and retrieval browsing. Including: establishing a multi-level geographic grid system and numbering the geographic grids; extracting remote sensing image metadata and storing them in the database; processing remote sensing image slices according to the multi-level geographic grid system and optimizing the cache strategy to generate core-level tiles, And store it in the database; establish a bidirectional index of triples; when receiving a user request, search the database according to the index, if the requested tile exists, directly return the tile and related metadata; if the tile does not exist, then Generate tiles in real time on demand, and return and save the generated tiles and related metadata to the database. It solves the indexing problem of remote sensing image map service lacking metadata support, and the unbalanced coordination problem of full cache and real-time cache in terms of response speed and occupied space.

Description

technical field [0001] The present invention relates to the field of organization management, retrieval and browsing of remote sensing images, and more specifically relates to a remote sensing image tile map based on {geographical grid, metadata, tile} triple mutual bidirectional indexing and optimized caching technology service method. Background technique [0002] With the rapid development of remote sensing technology, remote sensing image data has exploded. How to efficiently organize, manage, retrieve and browse these massive remote sensing data, so as to serve disaster emergency response, environment, resources, agriculture and other industries more conveniently and quickly, has become a very urgent common business demand and technical demand. [0003] The traditional organization, management and use of remote sensing images with "scene" as the unit has many problems such as various data formats, cumbersome files, and the need for professional software to open them, w...

AI Technical Summary

Problems solved by technology

[0007] In view of the urgent need for portable remote sensing image map services in the field of remote sensing monitoring and the shortcomings of the above-mentioned current remote sensing image map service technologies, research is conducted on the establishment of a mutual bidirectional index and Optimize the remote sensing image tile map service method of caching technology, focusing on solving the problem of unbalanced coordination between the response speed and occupied space of the current remote sensing image map service that lacks the support of rich and convenient metadata and full cache and real-time cache

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