Mobile gis slice map display method based on concurrency control and double buffering technology
A double-buffering and slicing technology, applied in image data processing, image data processing, instruments, etc., can solve the problems of unsatisfactory mobile GIS map display, long slice loading time, and low slice download efficiency.
Active Publication Date: 2016-04-20
STATE GRID CORP OF CHINA +2
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Problems solved by technology
Due to the limitations of objective conditions such as the memory capacity and CPU performance of mobile devices are weaker than those of personal computers, and wireless network performance is unstable in some areas, in practical applications, the display effect of mobile GIS maps is often not ideal, and there is a download efficiency of slices. Low, repeated downloading of slices, long loading time of slices, etc.
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[0032] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific implementation examples.
[0033] The mobile GIS sliced map presentation method based on concurrency control and double buffer technology of the present invention. This method uses the slice calculator to calculate the slice information contained on the current screen of the mobile device through geometric relations, such as: slice number, slice geographic range, slice index, etc.; uses the slice download controller to adjust the number of concurrently downloaded slices through concurrency control technology The system resources of the mobile device can be fully utilized without causing excessive pressure on the server, thereby improving the download efficiency of slices; the slice loader uses memory and file double-buffering technology to avoid repeated downloading of slices and shorten the acquisition time of slices. Greatly imp...
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The invention relates to a mobile GIS (Geographic Information System) slice map showing method based on concurrent control and double-cache technologies. According to the method, the slice information such as slice amount, slice geographical range, slice index and the like on a current screen of mobile equipment is calculated by using a slice calculator according to a geometrical relationship; the concurrently downloaded slice amount is regulated by using a slice downloading controller through a concurrent control technology, so that the system resource of the mobile equipment is sufficiently utilized, meanwhile, no overhigh pressure is generated on a server, and furthermore, the slice downloading efficiency is increased; a slice loader adopts an internal storage and file double-cache technology, so that the repeated slice downloading is avoided, the slice acquiring time is shortened, and the slice showing efficiency is greatly increased. The invention provides a simple, convenient and effective mobile GIS slice map showing method for map developing personnel, the problem of poor map browsing fluency caused by objective condition limits such as the system resource of the mobile equipment, network environments and the like is solved, and the user experience is improved.
Description
technical field [0001] The present invention relates to a method for displaying a geographic information system (GIS) map, especially a method for displaying a mobile GIS (mobile device, such as a GIS system on a PDA, a tablet computer, or a smart phone) based on concurrency control and double buffering technology. The method for displaying the map. Background technique [0002] At present, with the development of wireless networks and the popularization of mobile devices such as smart phones, the application of Location-Based Service (LBS) is becoming more and more extensive. Opening location services, it can be said that LBS applications have penetrated into all aspects of our lives. [0003] As a support for LBS applications, the emergence of mobile GIS is precisely to meet the needs of using location services on mobile devices. The map is the foundation of mobile GIS and the core technology of mobile GIS system. Due to the limitations of objective conditions such as t...
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IPC IPC(8): G06T1/00H04L29/08
Inventor 曹海涛
Owner STATE GRID CORP OF CHINA