A rapid display method of mobile terminals for remote sensing data with a five-layer and fifteen-level organizational structure

Abstract

The invention discloses a mobile terminal rapid display method of remote sensing tile data with a five-layer and fifteen-level organizational structure. According to the display needs of the mobile terminal interface of remote sensing tile data with a five-layer and fifteen-level organizational structure, this method first calculates the range of row and column numbers of the tiles to be displayed, and then loads and displays the tiles in the tile list to be displayed in a loop, and executes the first level , The secondary cache strategy caches the tile data, and finally implements the delayed deletion strategy to realize dynamic management of memory. This method realizes the rapid loading and display of massive remote sensing tile data on the mobile terminal based on the five-layer and fifteen-level tile organization structure, and solves the problem of loading five-level and fifteen-level tile data directly by applying the traditional quadtree tile pyramid structure. When leveling tiles, there are problems such as memory overflow and poor continuity in map display, which achieves a smooth display effect.

Description

technical field [0001] The invention relates to the field of remote sensing applications, in particular to a method for quickly displaying remote sensing data at a mobile terminal with a five-layer and fifteen-level organizational structure. Background technique [0002] In recent years, with the intensive launch of a series of remote sensing satellites such as the Fengyun series, the Environmental Star series, the Resource series, and the Gaofen series, my country's remote sensing satellite technology has flourished, and the amount of remote sensing image data generated every day has also continued to grow at the terabyte level. We have accumulated long-term series of earth observation data, which have been widely used in fields such as meteorology, land, transportation, environmental protection, and disaster reduction. At the same time, the rapid development of mobile Internet technology has become a main direction of Internet development. Mobile map service applications in...

AI Technical Summary

Problems solved by technology

Although 1000×1000 image tiles are much larger in capacity than 256×256 tiles, with the rapid development and construction of mobile Internet infrastructure, network speed no longer constitutes a development bottleneck for mobile map applications. In the case of limited mobile RAM and ROM capacity, the rapid display of massive remote sensing image data has become the main bottleneck of mobile map applications; and there is still a technical gap in the loading and display of massive remote sensing data based on the five-layer and fifteen-level organizational structure on the mobile terminal. When directly applying the traditional quadtree tile pyramid structure data loading method to load five-layer fifteen-level tiles, there are problems such as memory overflow and poor continuity in map display.

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