Map automatic updating method in GPS navigation

Abstract

The invention relates to a map automatic updating method in GPS navigation. The method comprises the steps that: (1) a destination is set in an electronic map of a GPS navigation system; (2) according to a current location information of a navigation object, a navigation module searches an electric map database for navigation data for guiding the navigation object to arrive at the set destination; (3) when the navigation object moves, a dynamic trace of the current movements of the navigation object is recorded by a module generated by road network data updating, and is adopted as current road network data; and step (4), the current road network data is compared with original road network data in the electric map, such that a comparison result is obtained; if the result is that the data are not constant, namely the current road network data is novel, the current road network data is stored in the electric map database, such that electric map road network data amount in the electric map database is increased; if the result is that the data are constant, a navigation task is accomplished under the guidance of the navigation module. When the navigation object moves, automatic updating of electric map road network data is realized, such that on-spot situations can be more completely and precisely reflected by the map with more details, and an optimal navigation path can be found.

Description

technical field [0001] The invention relates to a navigation method, in particular to a method for automatically updating map information in GPS navigation. Background technique [0002] The Global Positioning System (GPS) utilizes the navigation satellite system for timing, positioning and ranging, and can provide real-time and high-precision three-dimensional space for users at sea, land and air continuously in all weathers and in all directions around the world. , speed and time information. The system is mainly composed of three parts, namely the space part, the ground control part and the user device part. The space part is composed of 24 satellites, which are distributed in 6 track planes. The ground control part consists of the main control station responsible for managing and coordinating the entire ground control system, the ground antenna that injects the search message into the satellite under the control of the main control station, the monitoring station as th...

AI Technical Summary

Problems solved by technology

[0004] However, most of the update methods of electronic maps used in the current GPS navigation system are passive. Generally, the updated map information is transmitted to the carrier equipped with electronic maps by a third party in a wireless or wired manner. Independently do regular software updates on the electronic map. Under normal circumstances, the original information of the electronic map is already very large, which can basically mark most of the roads and building information in the big city, basically satisfying people's needs in the city. However, for some low-level roads in rural areas and suburbs, as well as some remote paths or roads under construction, complete and detailed geographical data are often not marked in electronic maps to help people complete navigation tasks

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