Differential updating method and system of map data, and server

Abstract

The invention provides a differential updating method and system of map data, and a server. The differential updating method of the map data comprises the following steps: dividing the map data into a plurality of display grid areas according to the state of road network; detecting map data with a new version number when a data updating request of a navigation client is received, comparing the map data with the new version number with map data with an original version number, and identifying the display grid area with data change; obtaining differential data according to the display grid area with data change; and sending the differential data to the navigation client in order to make the navigation client update the displayed map data according to the differential data, wherein the differential data is obtained according to increased data recording, deleted data recording and updated data recording of the display grid area with data change. The map data is updated only through updating the differential data without updating the whole data packet, so the volume of updated data is small, and the real time property is good.

Description

technical field [0001] The invention relates to the technical field of car navigation, in particular to a map data differential update method, system and server. Background technique [0002] With the development of the Global Positioning System (Global Positioning System, referred to as GPS), navigation devices using GPS have been installed on various vehicles that require navigation. The GPS antenna of the car navigation device terminal receives the data information indicating latitude and longitude transmitted by the GPS satellite, combined with the electronic map stored in the car navigation device, the position coordinates determined by the GPS satellite signal are matched with this, and the navigation is determined. The exact position of the object in the electronic map. Its appearance has brought a lot of convenience to people's travel. The driver only needs to input the destination into the car navigator, and the system will automatically calculate the most suitable...

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a method, system and server for differential update of map data, which are used to solve the problems of large amount of updated data and poor real-time performance when updating map data in the prior art

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