Five-layer fifteen-level organization structure based remote sensing data mobile terminal rapid displaying method

Abstract

The invention discloses a five-layer fifteen-level organization structure based remote sensing data mobile terminal rapid displaying method. The displaying method includes: calculating a rank number range of a tile to be displayed according to the five-layer fifteen-level organization structure based remote sensing data mobile terminal interface displaying demand; circularly performing loading displaying on tiles in a tile list to be displayed, and executing a first level cache strategy and a second level cache strategy to cache tile data; and finally executing a delay deleting strategy so asto achieve dynamic management of memory. The displaying method can rapidly load and display the five-layer fifteen-level organization structure based remote sensing data on a mobile terminal, can solve the problem of memory overflow and poor map displaying continuity while the conventional quadtree tile pyramid structure based data loading manners are directly used to load five-layer fifteen-leveltiles, and can achieve a smooth displaying 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.

Images