Method for navigating data in local caching, system and customer terminal device

Abstract

The present invention discloses a method, a system and a customer terminal device for buffer memorizing the local navigation data, which aims at resolving the problems of the prior navigation device that the downloading speed is slow causing poor experience of the user. The method comprises the steps: the navigation data is stored in the server end in different layers and in different blocks, and each layer corresponds to different map scale, and the navigation data is classified into different sub-blocks in each layer, and an exclusive ID is calculated according to the layer level and the position of the sub-block at each layer; the downloaded navigation data is memorized at the navigation terminal in order, and the index for the navigation data is established according to the ID; the navigation terminal responds to the request of the user and calculates the ID according to the layer level and the position information in the request; the ID is searched in the local index, and if the index is found, the navigation data corresponding to the ID is obtained in the local area, and if the index is not found, the navigation data corresponding to the ID is downloaded from the server and is buffer memorized. The buffer memory method effectively resolves the problems of the communication navigation area that the bandwidth is limit, and the speed for the navigation terminal to download the navigation data from the server is slow, and improves the responding speed, and improves the application experience of the user.

Description

technical field [0001] The present invention relates to data caching technology, in particular to a method system for caching navigation data locally, and a client device. Background technique [0002] Satellite navigation system (GPS) is based on global satellite positioning technology, and is equipped with high-tech comprehensive application systems such as geographic information technology (commonly known as "electronic map" or GIS), computer technology, database technology and multimedia technology. It has a wide range of applications in many fields such as surveying and mapping, navigation, flight, and road traffic. In the field of communication and navigation, navigation equipment can provide drivers with humanized intelligent navigation services. For example, in a vehicle equipped with a navigation device, the driver can use the navigation device to determine the current geographic location, obtain detailed geographic information around it, including surrounding stre...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method, system and client device for caching navigation data locally, so as to solve the problem that the download speed of current navigation equipment is slow and cannot meet the real-time requirements of data download, resulting in poor user experience. question

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